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Yearly Normals for Thornton, IA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 3 22 13 0.93 1628 0 Feb 10 28 19 0.91 1293 0 Mar 23 41 32 1.94 1034 0 Apr 35 56 45 3.18 594 2 May 48 70 59 3.76 246 55 Jun 58 80 69 4.71 35 153 Jul 61 82 72 4.27 15 222 Aug 59 79 69 3.87 37 162 Sep 49 72 61 2.98 168 31 Oct 38 59 48 2.1 517 1 Nov 24 40 32 1.85 994 0 Dec 9 26 18 1.04 1469 0 Year 35 54 45 31.54 8030 626 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather