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Yearly Normals for Niwot, CO

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 12 42 27 0.42 1177 0 Feb 17 47 32 0.37 927 0 Mar 24 54 39 1.21 796 0 Apr 32 62 47 2.01 539 0 May 42 72 57 2.41 262 14 Jun 51 83 67 1.64 62 116 Jul 55 89 72 1.11 3 224 Aug 53 87 70 1.39 18 178 Sep 44 78 61 1.38 168 55 Oct 33 67 50 0.81 477 0 Nov 22 51 37 0.83 858 0 Dec 14 44 29 0.57 1128 0 Year 33 65 49 14.15 6415 587 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather