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Yearly Normals for Clear Lake, IA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 3 23 13 0.87 1606 0 Feb 10 30 20 0.75 1268 0 Mar 23 42 33 1.9 1010 0 Apr 34 57 46 3.31 578 2 May 48 71 60 3.88 227 57 Jun 57 80 69 4.73 33 150 Jul 62 83 73 4.32 12 243 Aug 59 81 70 4.48 32 183 Sep 49 73 61 2.93 162 38 Oct 38 61 49 2.33 490 1 Nov 23 42 33 1.72 978 0 Dec 10 28 19 0.98 1443 0 Year 35 56 45 32.2 7839 674 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather