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Yearly Normals for Heron, MT

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 21 32 26 4.06 1200 0 Feb 24 37 30 3.13 970 0 Mar 28 46 37 2.72 870 0 Apr 34 55 45 2.19 617 0 May 40 64 52 2.43 396 1 Jun 46 71 59 2.37 212 19 Jul 50 80 65 1.31 87 83 Aug 50 80 65 1.3 87 83 Sep 44 70 57 1.49 269 18 Oct 36 56 46 2.28 589 0 Nov 29 40 34 4.37 918 0 Dec 23 32 28 4.42 1153 0 Year 35 55 45 32.07 7368 204 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather