# 2.3 Relative Humidity Table

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Date
STUDENT RESOURCE PAGE 2.3
INFORMATION SHEET
Relative Humidity Table
To determine relative humidity:
1 Subtract the wet-bulb temperature from the dry-bulb
temperature.
2 Find this number—the difference in degrees—at the top of the
chart and place your ﬁnger on it.
3 Find the dry-bulb temperature in the ﬁrst column on the left. Place your ﬁnger
on it.
4 Bring your ﬁngers down the column and across the row. The relative humidity
percentage appears where column and row intersect on the chart.
Dry Bulb
(&ordm;C)
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
Number of degrees difference between the wet- and dry-bulb
1
88%
89
89
89
90
90
90
91
91
91
91
91
92
92
92
92
92
93
93
93
93
93
93
93
93
2
77
78
79
79
80
80
81
82
82
82
83
83
84
84
84
85
85
85
86
86
86
86
87
87
87
3
66
67
68
69
70
71
72
73
73
74
75
75
76
77
77
77
78
78
79
79
80
80
80
81
81
4
56
57
59
60
61
62
63
64
65
66
67
68
69
69
70
71
71
72
72
73
73
74
74
75
75
5
45
47
49
51
52
54
55
56
57
58
59
60
61
62
63
64
65
65
66
67
67
68
68
69
69
6
35
38
40
42
43
45
47
48
50
51
52
53
54
56
57
57
58
59
60
61
61
62
63
63
64
7
26
28
31
33
35
37
39
41
42
44
45
47
48
49
50
51
52
53
54
55
56
57
57
58
59
8
16
19
22
25
27
29
31
33
35
37
38
40
41
43
44
45
46
47
49
50
50
51
52
53
54
9
7
11
14
16
19
22
24
26
28
30
32
34
35
37
38
40
41
42
43
44
45
46
47
48
49
10
-2
5
9
11
14
17
19
21
24
26
27
29
31
32
34
35
37
38
39
40
41
42
43
44
WEATHER AND WATER • SECTION 2 HUMIDITY, DEW, AND FROST
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