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Climatological Normals

September Normals for Portland, ND

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 48 74 61 0.08 6 2 2 48 74 61 0.08 6 2 3 47 74 60 0.08 7 2 4 47 73 60 0.08 7 2 5 46 73 60 0.08 7 2 6 46 72 59 0.08 7 1 7 46 72 59 0.07 8 1 8 45 71 58 0.07 8 1 9 45 71 58 0.07 8 1 10 44 71 57 0.07 8 1 11 44 70 57 0.07 9 1 12 43 70 57 0.07 9 1 13 43 69 56 0.07 9 1 14 43 69 56 0.07 10 1 15 42 69 55 0.07 10 0 16 42 68 55 0.07 10 0 17 42 68 55 0.07 11 0 18 41 67 54 0.07 11 0 19 41 67 54 0.07 11 0 20 40 67 54 0.06 12 0 21 40 66 53 0.06 12 0 22 40 66 53 0.06 12 0 23 39 66 53 0.06 12 0 24 39 65 52 0.06 13 0 25 39 65 52 0.06 13 0 26 38 64 51 0.06 13 0 27 38 64 51 0.06 14 0 28 38 64 51 0.06 14 0 29 38 63 50 0.06 14 0 30 37 63 50 0.06 15 0 Month 42 69 55 2.05 306 19 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