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Yearly Normals for Napa, CA

Month Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling Jan 38 58 48 7.46 531 0 Feb 40 63 51 7.1 381 0 Mar 42 66 54 5.31 343 3 Apr 44 73 59 1.74 216 23 May 48 79 64 0.68 115 72 Jun 52 86 69 0.17 21 134 Jul 54 89 72 0.04 5 210 Aug 54 88 71 0.08 5 190 Sep 52 86 69 0.41 26 134 Oct 47 78 63 1.84 116 37 Nov 42 65 53 4.83 352 3 Dec 37 58 48 5.22 541 0 Year 46 74 60 34.88 2652 806 Data Controls Monthly | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather