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Yearly Normals for Joliet Park District, IL

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 11 29 20 1.62 1397 0 Feb 16 35 25 1.52 1113 0 Mar 26 46 36 2.57 890 0 Apr 36 59 48 3.88 519 1 May 46 72 59 3.91 237 49 Jun 56 81 68 4.34 40 136 Jul 61 84 72 4.39 8 237 Aug 58 82 70 4.38 27 189 Sep 50 75 63 3.5 120 46 Oct 38 63 51 2.71 448 3 Nov 28 47 38 3.17 828 0 Dec 16 34 25 2.4 1232 0 Year 37 59 48 38.39 6859 661 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather