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National Weather Service
Weather Information for Joliet, Illinois
  MAPMAP
Weather Forecast
Issued at 20:15  (Local time)  23 May  2022 
Date Temperature oC Weather
Minimum Maximum
24 May
( Tue ) 		8 19 Partly Sunny
Partly Sunny
25 May
( Wed ) 		12 24 Showers
Showers
26 May
( Thu ) 		17 21 Showers Likely
Showers Likely
27 May
( Fri ) 		13 20 Partly Sunny
Partly Sunny
28 May
( Sat ) 		12 25 Mostly Sunny
Mostly Sunny
29 May
( Sun ) 		17 29 Mostly Sunny
Mostly Sunny
30 May
( Mon ) 		20 30 Partly Sunny then Chance Showers
Partly Sunny then Chance Showers
>> 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 -0.3 45.7 10.7
Feb -6.4 2.2 43.4 8.9
Mar -1.5 8.6 57.2 10.6
Apr 4.0 15.9 88.6 11.4
May 9.3 21.9 103.6 11.4
Jun 15.4 27.2 98.6 10.1
Jul 17.7 29.0 110.0 9.4
Aug 17.1 28.0 105.7 9.0
Sep 12.5 24.6 76.5 8.2
Oct 5.9 17.7 72.1 9.5
Nov 0.7 9.7 77.7 10.8
Dec -6.2 1.8 55.9 11.3
>> 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.