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September Normals for Duwamish, WA

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 55 73 64 0.04 2 2 2 55 73 64 0.04 3 2 3 55 73 64 0.04 3 2 4 55 73 64 0.04 3 2 5 55 73 64 0.05 3 2 6 54 72 63 0.05 3 1 7 54 72 63 0.05 3 1 8 54 72 63 0.05 3 1 9 54 72 63 0.05 3 1 10 54 71 63 0.05 4 1 11 53 71 62 0.05 4 1 12 53 71 62 0.05 4 1 13 53 71 62 0.05 4 1 14 53 71 62 0.05 4 1 15 53 70 62 0.05 4 1 16 53 70 61 0.05 4 1 17 52 70 61 0.05 5 1 18 52 69 61 0.05 5 1 19 52 69 61 0.06 5 1 20 52 69 60 0.06 5 1 21 52 69 60 0.06 5 1 22 51 68 60 0.06 6 1 23 51 68 60 0.06 6 0 24 51 68 59 0.06 6 0 25 51 67 59 0.06 6 0 26 51 67 59 0.06 7 0 27 50 67 59 0.06 7 0 28 50 66 58 0.07 7 0 29 50 66 58 0.07 7 0 30 50 66 58 0.07 8 0 Month 53 70 61 1.61 139 27 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