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September Normals for Gretna, SD

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 51 79 65 0.06 3 4 2 51 79 65 0.06 4 3 3 50 78 64 0.05 4 3 4 50 78 64 0.05 4 3 5 50 78 64 0.05 4 3 6 49 77 63 0.05 4 3 7 49 77 63 0.05 5 2 8 48 76 62 0.05 5 2 9 48 76 62 0.05 5 2 10 47 75 61 0.05 5 2 11 47 75 61 0.05 6 2 12 47 75 61 0.05 6 2 13 46 74 60 0.05 6 1 14 46 74 60 0.04 6 1 15 45 74 60 0.04 7 1 16 45 73 59 0.04 7 1 17 45 73 59 0.04 7 1 18 44 72 58 0.04 8 1 19 44 72 58 0.04 8 1 20 44 71 58 0.04 8 1 21 43 71 57 0.04 8 1 22 43 71 57 0.04 9 0 23 43 70 56 0.05 9 0 24 42 70 56 0.05 9 0 25 42 70 56 0.05 10 0 26 41 69 55 0.05 10 0 27 41 69 55 0.05 10 0 28 41 68 55 0.05 11 0 29 40 68 54 0.05 11 0 30 40 68 54 0.05 11 0 Month 45 73 59 1.43 210 40 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