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Yearly Normals for Jeffco, CO

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 19 46 33 0.7 1010 0 Feb 23 49 36 0.75 818 0 Mar 28 56 42 1.78 722 0 Apr 34 63 48 2.88 501 0 May 42 72 57 3.05 265 13 Jun 51 82 66 1.99 68 109 Jul 56 87 72 1.88 3 206 Aug 55 85 70 1.63 19 174 Sep 47 77 62 1.79 136 49 Oct 37 67 52 1.28 406 1 Nov 27 53 40 1.42 758 0 Dec 21 46 33 0.78 981 0 Year 37 65 51 19.93 5687 552 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather