Currently: 45 °F. Scattered clouds. (Weather station: Lewis University Airport, USA). See more current weatherAnnual Weather Averages Near Joliet
Averages are for Lewis University Airport, which is 5 miles from Joliet.
Based on weather reports collected during 2012–2021.
All Year Climate & Weather Averages in Joliet
High Temp: 85 °F
Low Temp: 20 °F
Mean Temp: 53 °F
Precipitation: 3.04"
Humidity: 73%
Dew Point: 42 °F
Wind: 17 mph
Pressure: 128.68 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Joliet
High Temp: 34 °F
Low Temp: 20 °F
Mean Temp: 27 °F
Precipitation: 1.51"
Humidity: 81%
Dew Point: 20 °F
Wind: 20 mph
Pressure: 129.18 "Hg
Visibility: 8 mi
February Climate & Weather Averages in Joliet
High Temp: 35 °F
Low Temp: 21 °F
Mean Temp: 28 °F
Precipitation: 1.66"
Humidity: 78%
Dew Point: 20 °F
Wind: 19 mph
Pressure: 127.92 "Hg
Visibility: 8 mi
March Climate & Weather Averages in Joliet
High Temp: 48 °F
Low Temp: 33 °F
Mean Temp: 40 °F
Precipitation: 1.97"
Humidity: 71%
Dew Point: 30 °F
Wind: 20 mph
Pressure: 128.95 "Hg
Visibility: 9 mi
April Climate & Weather Averages in Joliet
High Temp: 59 °F
Low Temp: 41 °F
Mean Temp: 50 °F
Precipitation: 3.76"
Humidity: 65%
Dew Point: 36 °F
Wind: 20 mph
Pressure: 128.58 "Hg
Visibility: 9 mi
May Climate & Weather Averages in Joliet
High Temp: 72 °F
Low Temp: 53 °F
Mean Temp: 62 °F
Precipitation: 4.72"
Humidity: 67%
Dew Point: 49 °F
Wind: 18 mph
Pressure: 128.45 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Joliet
High Temp: 82 °F
Low Temp: 63 °F
Mean Temp: 73 °F
Precipitation: 4.27"
Humidity: 66%
Dew Point: 58 °F
Wind: 15 mph
Pressure: 128.18 "Hg
Visibility: 9 mi
July Climate & Weather Averages in Joliet
High Temp: 85 °F
Low Temp: 68 °F
Mean Temp: 77 °F
Precipitation: 3.15"
Humidity: 70%
Dew Point: 63 °F
Wind: 13 mph
Pressure: 128.57 "Hg
Visibility: 10 mi
August Climate & Weather Averages in Joliet
High Temp: 84 °F
Low Temp: 67 °F
Mean Temp: 75 °F
Precipitation: 4.18"
Humidity: 72%
Dew Point: 62 °F
Wind: 11 mph
Pressure: 128.64 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Joliet
High Temp: 78 °F
Low Temp: 61 °F
Mean Temp: 69 °F
Precipitation: 2.48"
Humidity: 72%
Dew Point: 57 °F
Wind: 14 mph
Pressure: 128.63 "Hg
Visibility: 10 mi
October Climate & Weather Averages in Joliet
High Temp: 64 °F
Low Temp: 47 °F
Mean Temp: 55 °F
Precipitation: 5.06"
Humidity: 74%
Dew Point: 45 °F
Wind: 16 mph
Pressure: 128.61 "Hg
Visibility: 9 mi
November Climate & Weather Averages in Joliet
High Temp: 49 °F
Low Temp: 34 °F
Mean Temp: 41 °F
Precipitation: 1.98"
Humidity: 76%
Dew Point: 32 °F
Wind: 18 mph
Pressure: 129.30 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Joliet
High Temp: 40 °F
Low Temp: 27 °F
Mean Temp: 33 °F
Precipitation: 1.79"
Humidity: 82%
Dew Point: 26 °F
Wind: 18 mph
Pressure: 129.10 "Hg
Visibility: 8 mi