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jolietwx.com - Annual Departure from Average

Temperature & Rainfall Trends

Note: Trends are based on data recorded at Joliet since 2007.


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Annual Temperature Trend
Month Average since 2007 Current Month Difference
January 25.0°F 29.3°F (2021) 4.3°F4.3°F Warmer than All-Time Average Temperature.
February 28.1°F 29.8°F (2020) 1.7°F1.7°F Warmer than All-Time Average Temperature.
March 39.8°F 42.0°F (2020) 2.2°F2.2°F Warmer than All-Time Average Temperature.
April 50.7°F 48.2°F (2020) -2.5°F2.5°F Colder than All-Time Average Temperature.
May 62.6°F 60.1°F (2020) -2.5°F2.5°F Colder than All-Time Average Temperature.
June 71.8°F 73.9°F (2020) 2.1°F2.1°F Warmer than All-Time Average Temperature.
July 75.3°F 77.5°F (2020) 2.2°F2.2°F Warmer than All-Time Average Temperature.
August 73.3°F 74.1°F (2020) 0.8°F0.8°F Warmer than All-Time Average Temperature.
September 66.9°F 65.0°F (2020) -1.9°F1.9°F Colder than All-Time Average Temperature.
October 54.0°F 50.8°F (2020) -3.2°F3.2°F Colder than All-Time Average Temperature.
November 41.2°F 46.4°F (2020) 5.2°F5.2°F Warmer than All-Time Average Temperature.
December 30.7°F 32.2°F (2020) 1.5°F1.5°F Warmer than All-Time Average Temperature.
Average 12 Month Temperature since 2007: 51.7°F
Current 12 Month Temperature: 52.5°F
Current 12 Month Temperature Trend: 0.8°F0.8°F Warmer than All-Time Average Temperature.

Annual Rainfall Trend
Month Average since 2007 Current Month Difference
January 0.72 in 0.19 in (2021) -0.53 in0.53 in less than All-Time Average Rainfall.
February 1.31 in 0.21 in (2020) -1.10 in1.1 in less than All-Time Average Rainfall.
March 2.15 in 2.16 in (2020) 0.01 in0.01 in Warmer than All-Time Average Temperature.
April 3.63 in 4.30 in (2020) 0.67 in0.67 in more than All-Time Average Rainfall.
May 4.11 in 6.59 in (2020) 2.48 in2.48 in more than All-Time Average Rainfall.
June 4.69 in --- in (2020)
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-4.69 in4.69 in less than All-Time Average Rainfall.
July 3.79 in 5.28 in (2020) 1.49 in1.49 in more than All-Time Average Rainfall.
August 3.58 in 0.60 in (2020) -2.98 in2.98 in less than All-Time Average Rainfall.
September 3.02 in 2.79 in (2020) -0.23 in0.23 in less than All-Time Average Rainfall.
October 3.19 in 1.83 in (2020) -1.36 in1.36 in less than All-Time Average Rainfall.
November 2.07 in 1.47 in (2020) -0.60 in0.6 in less than All-Time Average Rainfall.
December 1.05 in 2.51 in (2020) 1.46 in1.46 in more than All-Time Average Rainfall.
Average 12 Month Rainfall since 2007: 33.31 in
Rainfall for last 12 months: 27.93 in
Current 12 Month Rainfall difference: -5.38 in5.38 in less than All-Time Average Rainfall.
This data is reflective of 12 month trending at the Joliet Weather Station location. This is not official scientific data. The weather data presented here is based on data collected since 2007. Script courtesy of  Michael Holden from Relay Weather. Script calculations courtesy of Murry Conarroe of Wildwood Weather.