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September Normals for Forest Knolls, CA

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 52 83 68 0 1 3 2 52 83 68 0 1 3 3 52 83 68 0 1 3 4 52 83 68 0 1 3 5 52 83 68 0.01 1 3 6 52 83 68 0.01 1 3 7 52 83 67 0.01 1 3 8 52 83 67 0.01 1 3 9 52 83 67 0.01 1 3 10 52 83 67 0.01 1 3 11 52 83 67 0.01 1 3 12 52 83 67 0.01 1 3 13 52 82 67 0.01 1 3 14 52 82 67 0.01 1 3 15 52 82 67 0.01 1 3 16 52 82 67 0.01 1 3 17 52 82 67 0.01 1 3 18 52 82 67 0.01 1 3 19 51 82 67 0.01 1 3 20 51 82 67 0.01 1 3 21 51 82 67 0.01 1 3 22 51 82 67 0.01 1 3 23 51 82 66 0.01 1 3 24 51 82 66 0.01 1 3 25 51 81 66 0.01 1 3 26 51 81 66 0.01 1 3 27 51 81 66 0.01 1 3 28 50 81 66 0.02 1 3 29 50 81 66 0.02 2 2 30 50 81 65 0.02 2 2 Month 52 82 67 0.29 32 88 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