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Yearly Normals for Storm Lake, IA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 6 25 16 0.61 1536 0 Feb 13 32 22 0.63 1197 0 Mar 24 44 34 2.06 966 0 Apr 35 59 47 3.21 531 4 May 47 72 60 3.62 227 60 Jun 57 81 69 4.65 31 154 Jul 61 84 73 3.85 9 240 Aug 58 82 70 4.71 31 184 Sep 49 74 62 3.04 151 47 Oct 37 62 50 2.41 480 1 Nov 23 43 33 1.69 954 0 Dec 10 29 20 0.82 1409 0 Year 35 57 46 31.3 7522 690 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather