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September Normals for Union, IA

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 56 78 67 0.12 2 4 2 55 78 67 0.12 2 4 3 55 78 66 0.12 2 4 4 55 78 66 0.12 2 3 5 54 77 66 0.12 2 3 6 54 77 65 0.12 2 3 7 54 77 65 0.11 3 3 8 53 77 65 0.11 3 3 9 53 76 65 0.11 3 2 10 52 76 64 0.11 3 2 11 52 76 64 0.11 3 2 12 52 75 64 0.11 3 2 13 51 75 63 0.1 4 2 14 51 75 63 0.1 4 2 15 51 75 63 0.1 4 2 16 50 74 62 0.1 4 1 17 50 74 62 0.1 5 1 18 50 74 62 0.1 5 1 19 49 73 61 0.1 5 1 20 49 73 61 0.1 5 1 21 48 73 60 0.1 6 1 22 48 72 60 0.1 6 1 23 48 72 60 0.09 6 1 24 47 72 59 0.09 6 1 25 47 71 59 0.09 7 1 26 46 71 59 0.09 7 1 27 46 70 58 0.09 7 1 28 46 70 58 0.09 8 0 29 45 70 58 0.09 8 0 30 45 69 57 0.09 8 0 Month 50 74 62 3.1 135 53 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