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Yearly Normals for Forrest, IL

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 14 30 22 1.63 1339 0 Feb 18 36 27 1.44 1064 0 Mar 29 48 38 2.82 825 0 Apr 39 62 50 3.41 452 5 May 50 73 61 3.83 191 77 Jun 60 82 71 4.11 19 197 Jul 64 85 74 4.07 4 288 Aug 62 83 72 3.56 19 243 Sep 54 77 65 3.04 80 87 Oct 42 65 53 2.67 373 12 Nov 31 49 40 3.02 755 0 Dec 20 35 28 2.51 1155 0 Year 40 60 50 36.11 6276 909 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather