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Yearly Normals for Duncan, MI

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 15 31 23 1.8 1308 0 Feb 17 34 25 1.15 1110 0 Mar 26 46 36 1.53 904 0 Apr 35 59 47 2.16 534 1 May 46 71 59 3.21 248 45 Jun 55 80 67 3.59 47 115 Jul 58 83 71 3.14 6 187 Aug 56 81 69 3.84 33 144 Sep 50 74 62 3.36 125 32 Oct 39 63 51 2.57 449 5 Nov 31 48 39 2.62 771 0 Dec 21 35 28 1.45 1148 0 Year 37 59 48 30.42 6683 529 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather