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Hong Kong Observatory
of Hong Kong, China.
 
World Weather Information Service
United States of America
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National Weather Service
Weather Information for Chicago, Illinois
  MAPMAP
Weather Forecast
Issued at 10:17  (Local time)  18 Sep  2018 
Date Temperature oC Weather
Minimum Maximum
18 Sep
( Tue ) 		- 25 Chance thunderstorms
Chance thunderstorms
19 Sep
( Wed ) 		19 23 Chance thunderstorms
Chance thunderstorms
20 Sep
( Thu ) 		21 32 Chance thunderstorms
Chance thunderstorms
21 Sep
( Fri ) 		21 23 Slight Chance thunderstorms
Slight Chance thunderstorms
22 Sep
( Sat ) 		14 19 Mostly Sunny
Mostly Sunny
23 Sep
( Sun ) 		14 21 Mostly Sunny
Mostly Sunny
24 Sep
( Mon ) 		15 22 Mostly Sunny
Mostly Sunny
>> Click here for temperatures in oF
 
Climatological Information
Month Mean Temperature oC Mean Total Rainfall (mm) Mean Number of Rain Days
Daily
Minimum		 Daily
Maximum
Jan -8.6 -0.6 43.9 10.5
Feb -6.6 1.8 45.5 8.8
Mar -1.6 8.1 63.5 11.1
Apr 3.8 15.0 85.9 12.0
May 9.1 21.1 93.5 11.6
Jun 14.5 26.5 87.6 10.2
Jul 17.7 28.9 94.0 9.8
Aug 17.2 27.7 124.5 9.8
Sep 12.4 23.8 81.5 8.3
Oct 6.0 16.8 80.0 10.2
Nov 0.2 9.0 80.0 10.8
Dec -6.3 1.6 57.2 11.0
>> Click here for temperatures in oF

Remarks:
* Climatological information is based on monthly averages for the 30-year period 1981-2010.
* Attention: Please note that the averaging period for climatological information and the definition of "Mean Number of Precipitation/Rain Days" quoted in this web site may be different for different countries. Hence, care should be taken when city climatologies are compared.