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September Normals for Boston Harbor, WA

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 50 76 63 0.06 3 1 2 50 76 63 0.06 3 1 3 50 76 63 0.06 3 1 4 50 75 62 0.06 4 1 5 49 75 62 0.07 4 1 6 49 75 62 0.07 4 1 7 49 75 62 0.07 4 1 8 49 75 62 0.07 4 1 9 49 74 62 0.07 4 1 10 49 74 61 0.07 4 1 11 48 74 61 0.08 5 1 12 48 74 61 0.08 5 1 13 48 73 61 0.08 5 1 14 48 73 60 0.08 5 1 15 47 73 60 0.08 5 1 16 47 72 60 0.08 6 1 17 47 72 60 0.08 6 0 18 47 72 59 0.09 6 0 19 47 72 59 0.09 6 0 20 46 71 59 0.09 6 0 21 46 71 59 0.09 7 0 22 46 71 58 0.09 7 0 23 46 70 58 0.09 7 0 24 46 70 58 0.1 8 0 25 45 69 57 0.1 8 0 26 45 69 57 0.1 8 0 27 45 69 57 0.1 8 0 28 45 68 56 0.1 9 0 29 44 68 56 0.1 9 0 30 44 67 56 0.11 9 0 Month 47 72 60 2.47 172 16 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