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Yearly Normals for Onslow, IA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 7 26 17 1.18 1505 0 Feb 13 32 23 1.2 1186 0 Mar 25 45 35 2.2 933 0 Apr 36 58 47 3.04 531 3 May 48 71 60 3.6 218 49 Jun 58 80 69 4.61 27 147 Jul 62 84 73 3.24 6 255 Aug 60 82 71 4.73 29 206 Sep 50 74 62 3.4 132 44 Oct 39 62 50 2.35 461 2 Nov 27 45 36 2.43 882 0 Dec 14 31 23 1.5 1313 0 Year 37 57 47 33.48 7223 706 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather