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| Climatological Information for Chicago, United States |
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| Location of weather station : 42.0 N, 87.9 W, altitude : 205 m |
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 Data Period |
 Jan |
 Feb |
 Mar |
 Apr |
 May |
 Jun |
 Jul |
 Aug |
 Sep |
 Oct |
 Nov |
 Dec |
Mean Maximum Temperature (deg. C) |
1961-1990 |
-1.7 |
0.8 |
7.7 |
14.8 |
21.2 |
26.4 |
28.7 |
27.7 |
23.8 |
17.4 |
9.1 |
1.1 |
Mean Temperature (deg. C) |
1961-1990 |
-6.1 |
-3.7 |
2.9 |
9.2 |
14.9 |
20.3 |
22.9 |
22.1 |
18.0 |
11.6 |
4.4 |
-3.0 |
Mean Minimum Temperature (deg. C) |
1961-1990 |
-10.6 |
-8.2 |
-1.9 |
3.7 |
8.7 |
14.2 |
17.0 |
16.4 |
12.2 |
5.7 |
-0.2 |
-7.2 |
| Rainfall Amount (mm) |
1961-1990 |
38.9 |
34.5 |
68.3 |
92.5 |
84.3 |
96.0 |
93.0 |
107.2 |
97.0 |
61.2 |
74.2 |
62.7 |
| Days with Rain* |
1961-1990 |
7.3 |
6.2 |
9.0 |
9.5 |
8.9 |
8.0 |
8.0 |
7.5 |
7.7 |
6.6 |
7.9 |
7.8 |
Mean Daily Sunshine Duration (hours) |
1961-1990 |
4.4 |
4.9 |
6.0 |
7.2 |
9.1 |
10.4 |
10.3 |
9.1 |
7.6 |
6.2 |
3.8 |
3.4 |
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| * denotes number of days with at least 1.0 mm of rainfall |
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