Graphing Temperature & Interpreting Temperature below Freezing
The table below shows the hourly temperatures and weather conditions for Vancouver,
Canada over a 24 hour period from noon on Sunday 9th to 11am on Monday 10th January 2011.
Noon
1pm
2pm
3pm
4pm
5pm
6pm
7pm
1° C
Rain
2° C
Mostly
Cloudy
2° C
Mostly
Cloudy
1° C
Rain
1° C
Mostly
Cloudy
1° C
Rain
-1° C
Mostly
Cloudy
-1° C
Partly
Cloudy
8pm
9pm
10pm
11pm
12am
1am
2am
3am
-2° C
Partly
Cloudy
-2° C
Partly
Cloudy
-3° C
Partly
Cloudy
-3° C
Partly
Cloudy
-3° C
Partly
Cloudy
-2° C
Partly
Cloudy
-3° C
Partly
Cloudy
-3° C
Partly
Cloudy
4am
5am
6am
7am
8am
9am
10am
11am
-4° C
Partly
Cloudy
-4° C
Partly
Cloudy
-4° C
Partly
Cloudy
-5° C
Partly
Cloudy
-4° C
Partly
Sunny
-2° C
Partly
Sunny
-1° C
Partly
Sunny
-1° C
Partly
Sunny
Tasks
Draw a line graph to show the hourly temperatures from noon on 9th January 2011 until
11am on 10th January 2011.
On your line graph also show the general weather conditions for each hour.
Interpret your graph by answering the following questions:
1. What was the highest temperature recorded over the 24 hour period? At what time of
the day did this occur?
2. What was the temperature at 1pm and at 5am?
3. When was the temperature 1°C?
4. What was the coldest temperature over this 24 hour period and when was it recorded?
5. Between which times was the temperature rising?
6. Over what hour period did the temperature rise most rapidly?
7. Write a paragraph describing how the temperature changed over the 24-hour period.
8. Explain what a temperature of -5°C means.
9. If the temperature is 2°C and falls by 7°C, what is the new temperature? At what
time did this temperature occur?
10. If the temperature is -5°C and falls a further 3°C, what is the new temperature?
11. Which temperature is lowest: -8°C or -9°C?
12. Write down a temperature that is 2 degrees warmer than -14°C.
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