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Climatological Normals

September Normals for Littleton, CO

< August October > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 51 82 67 0.03 2 4 2 51 82 66 0.03 2 4 3 51 81 66 0.03 2 3 4 50 81 66 0.03 3 3 5 50 81 65 0.03 3 3 6 50 81 65 0.03 3 3 7 50 80 65 0.03 3 3 8 49 80 65 0.03 3 3 9 49 80 64 0.03 3 3 10 49 79 64 0.03 4 3 11 48 79 64 0.03 4 2 12 48 79 63 0.03 4 2 13 48 78 63 0.03 4 2 14 47 78 63 0.03 5 2 15 47 78 62 0.03 5 2 16 47 77 62 0.03 5 2 17 46 77 62 0.03 5 2 18 46 77 61 0.03 5 2 19 46 76 61 0.03 6 2 20 45 76 61 0.03 6 1 21 45 76 60 0.03 6 1 22 45 75 60 0.03 6 1 23 44 75 60 0.03 7 1 24 44 75 59 0.03 7 1 25 43 74 59 0.03 7 1 26 43 74 59 0.03 7 1 27 43 74 58 0.03 8 1 28 42 74 58 0.03 8 1 29 42 73 58 0.02 8 1 30 42 73 57 0.02 8 1 Month 47 78 62 0.88 149 61 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