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Yearly Normals for Derwood, MD

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 24 41 33 3.08 1007 0 Feb 27 45 36 2.7 815 0 Mar 34 55 44 3.75 639 0 Apr 43 66 54 3.23 326 3 May 52 74 63 4.44 115 58 Jun 60 82 71 3.84 10 192 Jul 65 86 75 3.86 0 317 Aug 63 84 74 3.38 2 264 Sep 56 78 67 4.12 40 101 Oct 45 67 56 3.32 295 14 Nov 37 56 46 3.21 567 0 Dec 28 45 37 3.04 878 0 Year 45 65 55 41.97 4694 949 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather