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51
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COP .
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71:114111:1:1111RIANS
12 01418 6 9939
COMPACT
105
.E55
no .516
rev .1979
cop•9-
Hyslop Field Laboratory
Microstation Climate Survey
'vire
c'ea6u.0
Special Report 516
Revised March 1979
Agricultural Experiment Station
Oregon State University, Corvallis
•
CONTENTS
Page
Probability of First Fall Frost 1
Probability of Last Spring Frost
2
Average Daily Solar Radiation 3
Average Daily Evaporation 4
Wind Frequency, Salem 5
Wind Frequency, Eugene
.
.
7
Daily Normal Temperatures Extreme Values of Temperature and Precipitation Weekly Mean Soil Temperature
Average Relative Humidity 6
11
23
25
•
Authors: Jim M. Crane and Wheeler Calhoun, Crop Science Department,
Oregon State University; Earl M. Bates, National Weather Service,
United States Department of Commerce, National Oceanic and
Atmospheric Administration.
S
S
PROBABILITY DATES OF
FIRST FALL OCCURRENCE OF VARIOUS FREEZING
TEMPERATURES
Ten Per Cent Chance of:
32°
Albany
Corvallis
Eugene
Forest Grove
Portland
Salem
October 13
October 11
October 9
September 25
November 3
October 9
28°
October 31
October 25
October 25
October 19
December 2
October 22
24°
November 9
November 12
November 7
November 4
December 9
November 7
Twenty Per Cent Chance of:
32°
•
Albany
Corvallis
Eugene
Forest Grove
Portland
Salem
October 20
October 18
October 16
October 3
November 10
October 16
28°
November 6
November 1
November 1
October 26
December 9
October 29
24°
November 20
November 23
November 18
November 15
December 20
November 18
Fifty Per Cent Chance of:
Albany
Corvallis
Eugene
Forest Grove
Portland
Salem
32°
28°
24°
November 3
November 1
October 30
October 17
November 24
October 30
November 22
November 17
November 17
November 11
December 25
November 14
December 14
December 17
December 12
December 9
January 13
December 12
Data for these tables extracted from OAES, Station Bulletin 581
•
PROBABILITY DATES OF
LAST SPRING OCCURRENCE OF VARIOUS FREEZING
TEMPERATURES
WILLAMETTE VALLEY
Fifty Per Cent Chance of:
Albany
Corvallis
Eugene
Forest Grove
Portland
Salem
24°
28°
32°
January 21
January 28
January 21
February 10
January 15
February 1
February 20
February 27
March 6
March 29
January 24
March 9
April 2
April 15
April 8
April 26
February 28
April 19
Twenty PerCent Chance of:
24°
Albany
Corvallis
Eugene
Forest Grove
Portland
Salem
February
February
February
March 5
February
February
28°
13
20
13
March 12
March 19
March 28
April 18
February 13
March 28
7
24
32°
April 17
April 30
April 23
May 11
March 15
May 4
Ten Per Cent Chance of:
Albany
Corvallis
Eugene
Forest Grove
Portland
Salem
24°
28°
February 25
March 4
February 25
March 17
February 19
March 8
March 21
March 28
April 6
April 27
February 22
April 7
32°
April 26
May 9
May 2
May 20
March 24
May 13
Data for these tables extracted from OAES, Station Bulletin 581
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AVERAGE DAILY EVAPORATION
From Standard Weather Bureau Open Pan
Hyslop Farm, Corvallis, Oregon
(1961 - 1978)
Day
April
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
.091
.071
.098
.107
.093
.097
.096
.116
.095
.065
.107
.119
.109
.099
.114
.098
.105
.116
.129
.095
.082
.125
.101
.099
.106
.113
.107
.140
.119
.120
May
June
.124
.125
.158
.136
.128
.132
.145
.155
.158
.137
.124
.165
.155
.167
.154
.147
.174
.199
.196
.174
.173
.188
.142
.144
.174
.172
.170
.175
.195
.175
.197
.187
.195
.205
.192
.191
.196
.182
.197
.167
.181
.202
.163
.202
.205
.227
.219
.223
.229
.248
.233
.226
.217
.189
.218
.222
.202
.217
.213
.225
.251
Inches
July
August
.243
.212
.250
.223
.254
.249
.233
.234
.237
.226
.207
.245
.264
.270
.261
.273
.261
.270
.274
.240
.281
.275
.299
.293
.297
.265
.266
.284
.276
.299
.293
4
.281
.260
.275
.257
.219
.254
.247
.266
.266
.303
.301
.270
.251
.224
.224
.234
.242
.238
.235
.206
.220
.198
.197
.195
.198
.210
.207
.198
.205
.216
.180
September
.194
.214
.190
.206
.208
.186
.196
.194
.185
.189
.191
.188
.227
.205
.165
.168
.172
.161
.162
.161
.139
.128
.139
.174
.157
.138
.132
.146
.138
.128
October
.134
.127
.113
.124
.129
.110
.100
.096
.091
.066
.067
.071
.080
.082
.089
.068
.071
.062
.071
.056
.053
.051
.042
.053
.053
.040
.054
.039
.034
.039
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ESSA-WEATHER BUREAU
AGRICULTURAL SERVICE OFFICE
OREGON STATE UNIVERSITY
Daily normal temperatures for Corvallis, Oregon, Hyslop Farm,
extrapolated from normals at Eugene and Salem, Oregon.
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
January
Temperature
Max Min Avg
45 33 39
45 33 39
45 33 39
44 32 38
44 32 38
44 32 38
44 32 38
44 32 38
44 32 38
44 32 38
44 32 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
44 31 38
45 31 38
45 31 38
45 31 38
45 31 38
45 32 39
46 32 39
46 32 39
46 32 39
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
February
Temperature
Max Min Avg
46 32 39
46 32 39
46 32 39
46 32 39
46 33 40
47 33 40
47 33 40
47 33 40
47 33 40
47 33 40
48 33 41
48 33 41
49 34 42
49 34 42
49 34 42
49 34 42
50 34 42
50 34 42
50 34 42
50 35 43
51 35 43
51 35 43
51 35 43
51 35 43
51 35 43
52 35 44
52 35 44
52 36 44
52 36 44
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
March
Temperature
Max Min Avg
52 36 44
52 36 44
52 36 44
53 36 45
53 36 45
53 36 45
53 37 45
53 37 45
53 37 45
53 37 45
53 37 45
54 37 46
54 37 46
54 37 46
54 37 46
54 37 46
54 37 46
55 37 46
55 37 46
55 37 46
55 37 46
55 37 46
55 37 46
55 37 46
55 37 46
56 37 47
56 37 47
56 37 47
56 37 47
56 37 47
56 37 47
•
NATIONAL WEATHER SERVICE
AGRICULTURAL SERVICE OFFICE
OREGON STATE UNIVERSITY
Daily normal temperatures for Corvallis, Oregon, Hyslop Farm,
extrapolated from normals at Eugene and Salem, Oregon.
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
April
Temperature
Max Min Avg
57 38 48
57 38 48
57 38 48
58 38 48
58 38 48
58 39 49
58 39 49
58 39 49
58 39 49
59 39 49
59 40 50
60 40 50
60 40 50
61 40 51
61 40 51
62 40 51
62 41 52
62 41 52
62 41 52
63 41 52
63 41 52
63 41 52
63 42 53
63 42 53
63 42 53
64 42 53
64 42 53
64 43 54
65 43 54
65 43 54
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
May
Temperature
Max Min Avg
65 43 54
65 43 54
65 43 54
65 43 54
65 43 54
66 44 55
66 44 55
66 . 44 55
66 44 55
66 44 55
66 44 55
66 44 55
67 45 56
67 45 56
67 45 56
67 45 56
67 45 56
67 45 56
67 45 56
68 46 57
68 46 57
68 46 57
68 46 57
68 46 57
68 46 57
68 46 57
69 47 58
69 47 58
69 47 58
69 47 58
69 47 58
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
June
Temperature
Max Min Avg
69 47 58
69 47 58
69 47 58
70 47 59
70 48 59
70 48 59
70 48 59
70 48 59
70 48 59
71 48 60
71 48 60
71 48 60
72 49 61
72 49 61
72 49 61
72 49 61
73 49 61
73 49 61
73 49 61
73 49 61
74 49 62
74 49 62
74 49 62
75 50 63
75 50 63
75 50 63
76 50 63
76 50 63
76 50 63
77 50 64
•
•
NATIONAL WEATHER SERVICE
AGRICULTURAL SERVICE OFFICE
OREGON STATE UNIVERSITY
Daily normal temperatures for Corvallis, Oregon, Hyslop Farm,
extrapolated from normals at Eugene and Salem, Oregon.
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
July
Temperature
Max Min Avg
78 51 65
79 51 65
79 51 65
79 51 65
80 51 66
80 51 66
80 51 66
80 51 66
80 51 66
81 51 66
81 51 66
81 51 66
81 51 66
81 51 66
81 51 66
81 51 66
81 51 66
81 52 67
81 52 67
81 52 67
82 52 67
82 52 67
82 52 67
82 52 67
83 52 68
83 52 68
83 52 68
83 52 68
83 52 68
83 52 68
83 52 68
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
August
Temperature
Max Min Avg
82 52 67
82 52 67
82 52 67
82 52 67
82 52 67
82 52 67
82 52 67
82 52 67
82 52 67
82 52 67
81 51 66
81 51 66
81 51 66
81 51 66
81 51 66
81 51 66
80 51 66
80 51 66
80 51 66
80 51 66
80 51 66
80 51 66
80 51 66
79 51 65
79 50 65
79 50 65
79 50 65
79 50 65
79 50 65
79 50 65
79 50 65
September
Day Temperature
Max Min Avg
1 79 50 65
2 79 50 65
3 79 50 65
4 79 50 65
5 78 49 64
6 78 49 64
7 78 49 64
8 78 49 64
9 77 49 63
10 77 49 63
11 77 49 63
12 77 49 63
13 77 49 63
14 76 48 62
15 76 48 62
16 76 48 62
17 76 48 62
18 75 48 62
19 75 48 62
20 75 47 61
21 75 47 61
22 75 47 61
23 74 47 61
24 74 47 61
25 73 47 60
26 73 47 60
27 72 46 59
28 72 46 59
29 72 46 59
30 71 46 59
NATIONAL WEATHER SERVICE
AGRICULTURAL SERVICE OFFICE
OREGON STATE UNIVERSITY
Daily normal temperatures for Corvallis, Oregon, Hyslop Farm,
extrapolated from normals at Eugene and Salem, Oregon.
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
October
Temperature
Max Min Avg
71 45 58
71 45 58
7.0 45 58
70 45 58
69 45 57
68 45 57
68 45 57
68 45 57
67 44 56
67 44 56
66 44 55
66 44 55
65 44 55
65 43 54
65 43 54
64 43 54
64 43 54
63 43 53
63 43 53
62 42 52
62 42 52
62 42 52
60 42 51
60 42 51
60 41 51
60 41 51
59 41 50
59 41 50
58 40 49
57 40 49
57 40 49
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
10
November
Temperature
Max Min Avg
57 39 48
56 39 48
56 39 48
56 38 47
56 38 47
55 38 47
55 38 47
54 38 46
54 38 46
54 38 46
54 38 46
53 38 46
53 37 45
53 37 45
53 37 45
52 37 45
52 37 45
52 37 45
51 37 44
51 37 44
51 37 44
51 37 44
50 36 43
50 36 43
50 36 43
50 36 43
50 36 43
50 36 43
49 36 43
49 36 43
Day
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
December
Temperature
Max Min Avg
49 36 43
49 36 43
49 36 43
49 36 43
49 36 43
48 36 42
48 36 42
48 36 42
48 36 42
48 36 42
47 35 41
47 35 41
47 35 41
47 35 41
47 35 41
47 35 41
47 35 41
47 35 41
46 35 41
46 35 41
46 35 41
46 35 41
46 35 41
46 34 40
46 34 40
45 34 40
45 34 40
45 34 40
45 34 40
45 33 39
45 33 39
•
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
January
Date
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Aft 16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
II,
Maximum
Year
Minimum
Year
59
57
58
60
64
60
60
60
56
57
59
57
56
56
58
60
58
61
60
60
61
62
59
61
61
61
64
64
59
64
64
1940
1953
1902
1914
1914
1914
45, 14
1962
33, 45, 53
1953
1928
1945
1973
1970
1974
1958
19, 71
1975
75, 77
1968
1968
1931
05, 19, 31, 70
31, 35
1935
1924
1931
1931
20, 40
1940
1971
3
8
18
16
10
13
11
9
6
9
0
1
12
13
7
17
15
11
8
12
4
11
11
11
12
15
7
11
12
12
-1
1924
1924
59, 74
1924
1924
1924
1937
1974
1909
1974
1909
1909
09, 30
1930
1907
1907
1916
1950
1916
1949
1930
1927
1962
02, 43
02, 30, 49
1957
1957
1957
1957
1957
1950
1
1
Precipitation
1.15
1.58
3.43
2.38
1.65
2.55
2.00
1.36
1.38
1.53
2.03
2.55
2.60
1.13
2.74
1.95
3.40
2.25
1.38
2.00
2.71
1.95
1.51
1.14
1.73
1.30
1.69
4.28
1.28
.75
1.29
Year
1933
1933
1907
1966
1914
1923
1942
1953
1959
1950
1972
1936
1974
1915
1974
1974
1911
1911
1953
1964
1972
1974
1970
1941
1970
1975
1959
1965
1958
1958
1958
•
EXTREME VALUES SINCE 1389
Extreme Data for
Corvallis, Oregon
February
Date
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
Maximum
66
59
62
61
61
60
63
62
63
63
64
62
62
62
66
68
67
64
65
63
62
63
63
69
65
68
68
68
68
Year
1940
1960
1917
1928
52, 30
1961
1947
1952
1951
51, 63
1963
1931
71, 77
1951
1902
1902
1916
16, 43
1916
1977
1941
02, 32, 50, 73
16, 47
1905
1905
1932
1932
01, 68
1968
Minimum
11
3
-2
-5
-2
-2
21
17
11
17
18
15
18
21
21
17
20
23
21
24
23
25
24
22
21
17
18
25
26
12
Year
Precipitation
1899
1950
1899
1899
1899
1899
1929
1929
1933
29, 33
05, 29
1954
1905
1905
1936
1956
1956
1936
1955
1955
1955
20, 42
20, 47
1920
1962
1962
1962
13, 18, 71
1960
1.23
1.25
1.78
1.96
1.00
1.98
1.80
1.34
2.56
2.76
1.20
1.38
1.23
2.00
1.68
1.93
2.13
1.26
1.57
1.41
2.17
1.17
.78
1.29
1.47
1.17
1.28
1.00
.77
Year
1947
1925
1942
1926
1908
1943
1979
1922
1919
1961
1979
1954
1954
1904
1904
1970
1949411
1949
1968
1921
1956
1949
1909
14, 26
1902
1919
1971
1940
1904
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
March
•
Date
Maximum
Year
Minimum
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
72
73
68
65
64
65
73
76
77
72
72
72
71
78
78
77
78
77
73
76
75
75
73
69
71
73
77
74
77
78
77
1905
1905
26, 28
28, 43, 65
1965
1965
1905
1905
1905
1941
1934
1934
1934
1926
1947
1947
1947
1947
1914
1915
1915
15, 39
1915
1953
1930
41, 69
1941
1969
1923
1923
1911
12
18
20
21
23
14
23
26
27
27
24
24
22
25
22
25
22
26
28
28
29
29
28
29
24
28
27
30
28
25
28
1971
1971
1923
1923
1955
1956
1956
1974
1974
1956
1903
1906
1906
17, 23
1926
06, 17
1906
1917
1965
1954
12, 44
1952
1924
16, 42
1913
1919
1922
44, 49, 61
25, 72
1936
20, 70
•
13
Precipitation
1.01
1.46
1.62
1.52
.70
1.32
.76
1.10
1.67
1.26
.97
1.38
.82
.90
1.74
1.38
1.00
1.67
.80
.95
.96
1.10
1.05
.77
1.28
1.89
1.35
1.61
1.86
1.90
1.76
Year
1977
1972
1916
1902
1960
1916
1957
1951
1966
1907
1961
1946
1961
1912
1908
1921
1945
1938
22, 73
1904
1905
1938
1907
1932
16, 62
1916
1940
1974
1963
1963
1943
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
April
Date
Maximum
Year
Minimum
Year
Precipitation
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
77
78
76
80
82
80
78
75
79
80
86
85
84
84
85
80
83
83
80
88
82
80
87
86
83
88
88
91
88
85
1911
1944
1951
1949
1930
1906
1939
28, 38
1904
1904
1904
1904
43, 47
43, 47
1926
1947
1939
1939
1918
1906
1934
1905
1910
1910
1926
1947
1926
1926
1926
1957
30
28
24
26
28
27
28
28
30
29
29
28
24
27
29
29
28
29
28
29
29
30
30
29
30
31
30
28
27
29
1936
06, 70
1918
1918
1956
1975
1921
1919
22, 27, 29
1927
1927
1903
1968
11, 19
55, 67
1960
1964
1902
27, 68
1927
1968
22, 72
04, 22
1942
1908
05, 43
1955
1913
1954
1912
1.13
.54
.66
.85
.92
.88
.77
.92
1.83
1.10
.72
.63
2.06
1.14
.69
.59
1.06
.65
.82
.50
.53
.65
.47
.43
.47
.47
1.37
.48
.42
.60
1934
1978
1954
1901
1941
1902
1907
1972
1971
1914
1971
1972
1937
1929
1937
38, 63
1908
1925
1965
1960
1923
1978
1975
1936
1906
1937
1962
1951
10, 55
1940
14
•
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
May
•
Date
Maximum
Year
Minimum
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
85
86
84
82
85
84
90
88
84
89
88
91
95
91
82
86
88
92
86
91
92
90
92
91
91
88
82
86
90
93
99
1947
1946
1944
1944
1931
1953
1905
1906
1940
1931
1931
1949
1939
1939
1925
1922
1956
1956
1946
1928
1963
1938
1947
1938
1928
02, 36, 38
04, 52, 76
1952
1931
1931
1922
28
29
31
32
28
30
31
30
32
31
31
33
33
33
35
34
34
33
32
31
33
31
36
33
31
31
33
35
34
30
30
1915
1964
1964
1952
1909
1909
1970
1922
08, 26
1920
1916
1977
58, 64
1920
1974
1917
1976
09, 76
1927
1975
09, 55
1920
09, 35, 78
11, 26
1920
1922
21, 54, 66
14, 76
11, 76
1920
1919
•
15
Precipitation
1.03
.68
1.10
2.23
1.15
1.58
1.12
.68
.59
.90
.43
.53
.90
1.07
.69
.70
.98
.94
.70
.46
.77
.64
.66
.33
.67
.64
.26
.22
.68
.53
.93
Year
1949
1977
1975
1941
1941
1963
1963
1916
1957
1937
1905
1945
1902
1978
1901
1972
1972
1957
1969
1968
1939
1939
1968
1953
1968
1971
1953
1958
1932
1943
1956
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
June
Date
Maximum
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
92
95
94
90
96,
96
98
91
95
94
96
94
91
88
96
98
94
97
91
98
94
92
96
102
101
95
91
95
100
100
1913
1970
1950
35, 69
1935
1935
1903
1948
1955
1955
1940
1940
1916
16, 40
1916
1966
1961
61, 69
45, 46, 67
1902
1970
26, 58, 73
1926
1925
1925
1907
18, 37
1957
1924
1942
Minimum
32
39
35
33
38
34
37
37
39
38
38
35
33
39
37
35
35
36
38
35
38
39
37
32
38
40
37
38
38
40
16
Year
Precipitation
1929
1976
1976
1950
09, 53
1918
1961
1919
1938
1946
1956
1917
1976
71, 73
1952
1955
1911
1911
1914
1911
1914
08, 19
1920
1911
1901
1974
1965
19, 71
1919
19, 27, 56, 61
.44
.38
.51
.58
.60
.54
.65
1.68
.63
.34
.94
.70
.43
.55
1.03
.44
1.32
.45
1.06
.69
.68
.80
.76
.31
1.02
.48
.52
.52
2.14
.50
Year
1947
1947
1930
1977
1959
1953
1914
1927
1954
1915
1910
1912
1931
1936
1906
19041'
193141,
1937
1937
1910
1943
1913
1969
1941
1971
1911
1969
1955
1952
1916
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
July
Date
Maximum
Year
Minimum
Year
1942
1942
1922
1967
26, 72
1960
1960
1905
1926
1926
1951
1961
1935
17, 41
1941
1941
1914
08, 59, 72
1931
1946
1938
1939
1928
1928
1928
1939
1939
1958
1960
1907
1959
40
38
36
39
40
40
40
39
39
41
43
42
38
40
41
43
41
40
42
42
41
41
42
43
42
42
42
42
41
44
41
1919
1910
18, 21
1926
1919
1902
1955
11, 26
60, 64
1924
21, 43
19, 21
1904
1968
1968
1952
1955
09, 10
26, 76
22, 24, 26
1922
1922
1910
01, 12, 53, 73
01, 66
1922
26, 57
1970
1956
45, 69
1956
1
101
2
3
4
5
6
104
99
95
94
97
7
100
8
9
10
11
112
13
14
15
A1116
11/17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
102
100
100
99
102
106
103
102
104
99
98
104
107
104
101
102
102
101
104
97
103
98
102
99
17
Precipitation
.69
.47
.50
.23
.34
.81
.41
.57
.87
.19
.12
.06
.41
.29
.49
1.08
.43
.17
.16
.20
.26
.02
.08
.15
.02
.42
.47
1.75
.32
.07
.08
Year
1902
1902
1913
1976
1961
1909
1923
1946
1974
1954
1936
1925
1920
1904
04, 26
1916
1974
1974
1950
1968
1934
1965
1919
1912
1909
1947
1947
1947
1975
1947
1937
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
August
Date
Maximum
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
101
101
98
100
99
102
103
_105
103
99
101
103
104
102
99
100
100
98
99
98
99
99
97
96
99
99
99
100
98
99
96
1965
1939
1939
01, 52
1932
1902
1972
1972
1978
67, 77
1977
1977
1977
1942
1942
19, 27
40, 77
1940
1951
1951
1950
1942
1917
1918
1918
1935
1935
1931
44, 67
1918
1918
Minimum
Year
43
43
43
42
41
41
41
41
41
42
41
43
42
40
42
41
42
40
39
41
41
37
41
35
41
39
40
39
39
39
37
10, 26, 37, 69
26, 55
1950
1903
1909
1909
1926
1909
1912
1903
08, 59
10, 18
27, 55
1955
1955
1909
1914
1913
1973
22, 52
1973
1973
1973
1910
21, 25
1957
1925
1957
1924
1907
1914
18
Precipitation
.07
.28
.46
.42
.35
.23
.28
.21
.33
.09
.55
.43
.06
.25
.45
.67
.57
.70
.47
.43
.32
.55
.41
1.35
1.29
.83
.62
.54
.95
.25
.69
Year
1964
1956
1947
1933
1943
1976
1907
1907
1932
1932
1922
1965
13, 78
1976
1912
1912
1976
1926
65, 68
1978
1943
1925
1968
1968
1968
1953
1941
1975
1943
1912
1939
•
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
September
Date
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
6
4
7
18
19
20
21
22
23
24
25
26
27
28
29
30
1
Maximum
Year
Minimum
Year
95
99
97
93
103
98
97
98
97
101
96
94
95
98
94
98
92
92
90
94
95
95
95
93
97
92
94
92
87
87
1905
1934
1935
18, 35, 72
1944
1955
1958
44, 58
44, 48
1944
1922
1922
1951
1937
57, 67
1967
18, 51
18, 62
1918
1974
47, 52, 74
47, 52
43, 52
1943
1974
1949
1967
1967
1932
18, 23
41
37
38
41
40
40
37
39
38
36
36
34
33
38
34
35
33
35
34
37
37
31
35
35
27
30
32
32
34
32
01, 14, 21, 73
1936
13, 69
1954
1954
14, 20
1910
1927
13, 64
1952
1952
1921
1921
1921
1970
1921
1911
1911
06, 11
24, 58, 60
55, 64
1904
58, 61
1909
1909
1909
1972
1902
1961
1903
•
19
Precipitation
1.89
.59
.32
1.22
.54
.46
.59
.71
.65
.65
1.15
1.57
.95
1.28
1.38
.72
.60
2.18
1.00
.54
1.52
.54
.76
1.25
.34
.86
1.29
.77
.62
.60
Year
1941
1971
1913
1911
1938
27, 76
1912
1917
1949
1978
1941
1906
1920
1935
1946
1955
1914
1969
1941
1970
1944
1972
1920
1924
01, 05
1911
1957
1955
1925
1909
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
October
Date
Maximum
Year
Minimum
Year
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
89
86
90
87
85
86
87
87
90
89
90
82
79
79
80
82
83
80
83
76
79
79
83
77
74
75
70
72
70
70
73
1975
1952
1932
1932
1952
1952
1952
1976
1936
34, 36
1936
1901
1937
1929
29, 52, 61
1936
1936
36, 40
1940
1938
1937
29, 37
1929
1929
1904
1944
1944
31, 37, 44
1931
1917
1949
33
30
31
26
33
30
29
31
31
31
31
34
30
30
29
31
31
27
29
27
24
29
29
28
31
27
27
25
25
26
29
03, 21, 50
1954
1916
1916
1974
13, 37
1970
16, 61
1912
1924
1915
1912
1966
25, 66
1933
25, 46
49, 64
1949
1905
1949
1933
1928
1916
1945
16, 54, 71
1954
1954
1971
1971
1971
26, 27
20
Precipitation
1.14
.78
1.81
.92
.97
.81
1.20
.99
1.77
1.56
.85
1.28
.96
1.08
1.56
1.24
.80
1.09
1.55
1.76
1.39
1.24
1.84
1.71
.67
1.11
1.20
1.32
2.26
1.20
.75
Year
1951
1914
1967
1939
1950
1905
1913
62, 69
1955
1953
1948
1968
1908
1908
1947
1918 Alk
1947
1947
1909
1946
1934
1931
1951
1940
1931
1921
1950
1950
1924
1924
1901
Mr
•
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
November *
Date
Maximum
Year
Minimum
Year
1
72
69
72
72
69
67
70
66
68
67
70
68
68
64
66
67
68
64
60
68
68
64
65
67
67
63
60
60
63
68
1954
1969
1927
1975
1975
1939
1958
1941
1907
1930
1907
1906
1974
06, 49
1919
1919
1976
19, 32
12, 18, 39
1966
1917
1933
1909
1936
1947
1947
1949
40, 47
1928
1907
21
22
15
19
22
23
26
26
26
25
24
23
18
16
14
16
19
24
25
22
25
23
20
20
21
18
15
20
20
23
1935
1936
1935
1935
1957
1957
1957
36, 77
1959
1920
16, 20
36, 55, 78
1978
1955
1955
1955
1955
1955
29, 77
61, 77
1922
1938
1952
1952
1952
1952
1952
1936
1952
56, 69, 76
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
'III' 17
18
19
20
21
22
23
24
25
26
27
28
29
30
•
Precipitation
1.50
1.88
1.48
1.47
2.00
1.98
2.36
1.88
2.37
1.48
1.21
1.70
2.76
1.55
1.86
2.22
1.91
1.70
1.78
3.16
1.18
2.37
1.80
2.38
2.00
2.56
1.72
1.21
2.21
1.36
* November 1973 was the wettest-November on record with 18.28 inches.
Thus November 1973 is the absolute wettest month.
•
21
Year
1924
1909
1944
1906
1910
1903
1906
1964
1912
1928
1960
1965
1941
1942
1941
1973
1954
1946
55, 58
1921
1973
1961
1923
1907
1977
1962
1945
1914
1926
1902
•
EXTREME VALUES SINCE 1889
Extreme Data for
Corvallis, Oregon
December *
Date
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Maximum
65
62
63
63
59
58
63
62
59
60
60
65
61
61
57
58
59
58
61
58
60
61
66
61
56
60
60
63
66
63
61
Year
Minimu
1939
1958
1958
1939
1954
06, 44, 70
1938
1915
1915
1942
1958
1974
1960
1977
1977
50, 69, 74, 76
1974
11, 31, 41
1915
06, 40, 53
1972
1955
1950
1950
02, 33, 43, 64, 73
1917
1917
1917
1917
1917
1958
20
22
25
2
22
20
1
-7
-6
1
-4
-14
-14.5
-10
-5
1
10
5
6
1
13
5
-2
-8
-5
8
20
17
11
1
Year
Precipitation
Year
1956
1956
1906
06, 72
1972
1972
1972
1972
1972
1972
1972
1919
1919
1919
1 91
1919
1919
1964
1924
1924
1
1924
1914
1924
1924
1924
1924
1924
1924
1978
1978
1968
1
1968
1.65
3.58
1.24
2.00
2.05
2.78
1.47
1.43
1.68
2.16
1.44
2.37
1.77
2.09
1.02
1.98
1.82
2.42
1.42
1.84
2.18
1.96
1.69
1.16
1.90
1.63
2.16
2.02
2.52
1.20
1.89
1975
1941
15, 77
1975
1968
1933
1973
1901
1922
1968
11929
1969
1917
1929
1939
* December 1976 was driest December of record with a total of 1.47.
22
1940
19410F
1929
1941
1957
1964
1964
1932
1965
11907
1917
1937
11965
1937
1917
1970
Weekly Mean Soil Temperatures
15 Year Average (1961 to 1968 and 1970 to 1978)
For Woodburn Silty Clay Loam Soil
2 inch
Month, Week Max.
Min.
4 inch
Max.
Min.
8 inch
Max.
Min.
20 inch
Max.
Min.
40 inch
Max.
Min.
Jan.
1
2
3
4
5*
Feb.
1
2
3
4
Mar.
41.0
40.9
44.5
42.0
44.2
36.6
36.6
40.3
37.3
37.2
39.7
40.4
42.9
41.0
41.3
37.2
38.0
40.1
35.7
38.0
38.9
39.5
41.5
39.9
39.8
37.4
37.9
39.6
38.6
37.6
41.7
41.6
41.5
41.5
42.7
40.7
40.7
40.5
40.9
39.4
48.6
48.3
47.5
47.0
46.7
48.3
48.0
47.3
46.9
46.4
44.3
47.0
48.5
48.1
38.3
39.2
40.2
39.4
42.3
44.5
44.8
45.8
38.9
40.4
41.3
40.8
41.0
42.5
43.9
43.4
39.3
40.4
41.9
40.7
41.7
42.0
42.9
43.1
40.9
40.9
42.1
42.4
47.0
47.1
47.4
47.5
46.8
46.9
47.1
47.4
1
2
3
4
5*
48.1
50.6
53.8
54.4
56.4
39.4
40.2
41.6
39.8
45.2
45.9
47.2
49.4
50.1
50.9
40.4
41.3
42.3
43.6
44.2
43.4
44.7
46.7
47.2
48.2
40.8
41.8
43.7
44.2
44.9
43.9
44.7
45.0
46.1
47.0
42.6
42.8
43.8
44.8
46.0
47.5
47.5
47.9
48.4
48.9
47.4
47.5
47.7
48.2
48.6
Apr.
1.
2
3
4
5*
58.3
59.3
59.9
63.5
61.2
43.4
44.7
45.1
46.7
45.8
54.7
55.0
56.1
57.7
58.0
45.3
46.0
46.2
48.4
47.3
51.2
50.8
51.1
54.1
52.5
46.2
46.6
47.8
49.5
48.7
46.7
48.1
48.9
49.3
48.5
46.3
47.4
48.2
48.9
47.9
49.7
50.4
51.4
51.6
51.7
49.2
50.2
50.7
51.3
51.5
May
1
2
3
4
5*
65.5
69.5
71.6
74.3
78.5
48.5
51.2
52.4
53.8
50.8
60.6
63.8
66.2
68.7
72.8
50.6
53.0
54.8
55.9
59.3
56.9
59.4
61.4
63.3
65.5
51.8
54.5
55.8
58.0
60.7
51.6
54.2
55.5
57.4
58.2
50.8
52.9
55.0
56.6
57.6
52.5
53.6
54.9
56.0
56.9
52.2
53.3
54.5
55.8
56.8
Jun.
1
2
3
4
5*
75.6
79.9
80.8
82.0
83.2
55.9
59.1
60.4
60.4
62.1
70.0
73.9
75.4
76.1
77.9
58.9
60.8
62.6
63.3
63.4
65.6
68.6
70.0
70.8
71.9
60.5
62.7
64.5
65.1
66.7
59.7
61.0
62.7
64.1
65.7
58.7
60.0
61.4
63.1
65.7
58.2
59.6
60.7
62.0
62.8
57.9
59.3
60.4
61.7
62.7
Jul.
1
2
3
4
5*
83.4
85.9
88.5
89.7
88.8
61.6
63.4
65.1
67.1
64.7
77.3
80.0
81.9
83.3
82.7
55.2
66.2
67.9
68.9
68.5
72.1
74.4
76.2
77.1
77.0
66.2
68.3
70.2
71.3
70.9
65.2
65.9
68.1
68.4
67.6
64.7
65.0
67.3
67.2
67.2
63.2
64.1
65.1
66.1
65.7
62.9
63.9
64.8
65.9
65.6
Aug.
1
2
3
4
5*
90.3
88.7
86.6
83.3
81.6
66.6
66.2
65.0
63.4
60.5
83.2
81.9
80.3
77.0
76.9
70.1
69.4
68.0
66.5
65.1
76.7
76.8
75.5
73.6
72.2
71.6
71.5
70.4
68.8
52.5
70.5
69.7
70.0
69.5
69.3
69.4
69.4
69.2
68.8
68.7
67.3
68.1
68.5
68.7
68.8
67.1
67.9
68.3
68.5
68.5
23
Weekly Mean Soil Temperatures
S
15 Year Average (1961 to 1968 and 1970 to 1978)
For Woodburn Silty Clay Loam Soil
2 inch
Month, Week Max.
Min.
4 inch
Max.
Min.
8 inch
Max.
Min.
20 inch
Max.
Min.
Sept.
1
2
3
4
5*
81.3
73.3
74.8
73.7
69.8
61.1
58.5
57.4
56.4
54.0
76.5
73.1
70.6
68.8
65.5
64.4
61.9
59.8
54.5
55.9
71.3
68.8
66.8
69.5
61.9
66.7
64.4
63.1
61.3
58.5
68.0
66.5
65.3
64.0
60.0
67.3
66.0
64.7
63.3
59.7
68.2
68.1
67.4
66.8
66.0
68.0
67.9
67.3
66.6
66.0
Oct.
1
2
3
4
5*
69.2
63.4
61.1
56.1
55.5
53.5
51.0
48.3
48.9
46.5
65.5
60.9
57.8
54.0
53.9
55.6
54.5
51.0
49.7
48.8
64.7
58.4
55.6
52.6
50.5
58.6
55.3
51.9
47.5
50.0
62.0
60.0
57.6
55.4
54.9
61.5
59.3
56.9
54.9
54.4
65.7
63.7
63.0
61.4
60.8
65.4
63.5
62.6
61.2
60.6
Nov.
1
2
3
4
5*
53.1
51.1
48.1
46.6
46.9
44.5
44.2
42.1
40.8
42.4
51.1
49.3
47.4
45.4
45.9
47.0
45.3
44.4
42.4
43.5
49.9
48.8
46.6
44.8
45.4
47.8
46.6
44.9
43.0
43.9
52.8
50.8
49.6
48.4
49.6
52.3
50.3
49.1
48.0
49.0
59.6
58.0
56.8
55.3
54.4
59.2
57.6
56.5
54.5
54.1
Dec.
1
2
3
4
5*
45.0
42.6
43.2
43.2
42.2
40.5
38.4
39.3
38.9
38.6
46.0
45.1
42.1
42.3
40.0
41.7
40.4
39.9
40.4
38.0
43.0
44.7
41.6
41.5
38.9
41.5
40.3
40.2
40.3
37.7
46.5
45.2
43.4
43.3
39.1
45.5
44.5
42.7
42.6
39.0
53.2
52.2
50.8
50.5
50.9
52.9
52.0
50.6
50.3
50.8
* Average of only three to eight years data.
24
40 inch
Max.
Min.
•
S
(..)
4:r
CI
LC)
CNJ
Cr)
.4'
1—I
r-I
.4-
r-I
N.
CO
ciN
03
00
crt
0 01 00 co ch
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