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Yearly Normals for Rock Falls, IA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 3 21 12 0.98 1651 0 Feb 10 27 18 0.72 1308 0 Mar 22 39 31 2.09 1061 0 Apr 34 55 45 3.2 619 2 May 47 69 58 3.92 264 45 Jun 57 78 68 4.5 53 130 Jul 61 81 71 4.35 19 210 Aug 59 79 69 4.88 39 153 Sep 49 71 60 3.28 182 26 Oct 37 59 48 2.31 532 0 Nov 23 40 31 1.98 1009 0 Dec 10 26 18 1.1 1472 0 Year 34 54 44 33.31 8209 566 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather