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September Normals for Napa, CA

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 53 87 70 0.01 0 6 2 53 87 70 0.01 0 6 3 53 87 70 0.01 0 5 4 53 87 70 0.01 0 5 5 53 87 70 0.01 1 5 6 53 87 70 0.01 1 5 7 52 87 70 0.01 1 5 8 52 87 70 0.01 1 5 9 52 87 69 0.01 1 5 10 52 87 69 0.01 1 5 11 52 86 69 0.01 1 5 12 52 86 69 0.01 1 5 13 52 86 69 0.01 1 5 14 52 86 69 0.01 1 5 15 52 86 69 0.01 1 5 16 52 86 69 0.01 1 5 17 52 86 69 0.01 1 5 18 51 85 68 0.01 1 4 19 51 85 68 0.01 1 4 20 51 85 68 0.02 1 4 21 51 85 68 0.02 1 4 22 51 85 68 0.02 1 4 23 51 85 68 0.02 1 4 24 51 84 68 0.02 1 4 25 51 84 67 0.02 1 4 26 50 84 67 0.02 1 3 27 50 84 67 0.02 1 3 28 50 84 67 0.02 1 3 29 50 83 67 0.02 1 3 30 50 83 66 0.02 1 3 Month 52 86 69 0.41 26 134 Data Controls Monthly: January February March April May June July August September October November December   | Yearly Related Maps Related Links Normal High Temperatures Normal Low Temperatures Normal Mean Temperatures Normal Precipitation - Forecast - Past Weather