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Yearly Normals for Island Grove, IL

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 18 35 26 2.38 1200 0 Feb 22 41 31 2.51 950 0 Mar 32 52 42 3.61 721 0 Apr 42 64 53 4.09 374 5 May 52 74 63 4.46 156 92 Jun 62 83 72 4.26 13 233 Jul 66 87 76 4.51 0 350 Aug 63 85 74 2.92 12 296 Sep 55 78 67 3.04 73 117 Oct 43 67 55 2.95 333 21 Nov 34 52 43 4.05 661 0 Dec 23 40 32 3.27 1040 0 Year 43 63 53 42.05 5533 1114 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather