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October Normals for O Fallon, IL

< September November > Day Temperatures (°F) Precipitation (in) Degree Days Min Max Avg Heating Cooling 1 52 74 63 0.09 4 2 2 52 73 63 0.09 4 2 3 51 73 62 0.09 5 2 4 51 73 62 0.09 5 2 5 50 72 61 0.09 5 2 6 50 72 61 0.08 5 1 7 50 71 61 0.08 6 1 8 49 71 60 0.08 6 1 9 49 71 60 0.08 6 1 10 48 70 59 0.08 7 1 11 48 70 59 0.08 7 1 12 48 69 59 0.08 7 1 13 47 69 58 0.08 7 1 14 47 69 58 0.08 8 0 15 46 68 57 0.08 8 0 16 46 68 57 0.08 8 0 17 46 67 56 0.08 9 0 18 45 67 56 0.08 9 0 19 45 66 56 0.08 10 0 20 45 66 55 0.08 10 0 21 44 65 55 0.09 10 0 22 44 65 54 0.09 11 0 23 44 64 54 0.09 11 0 24 43 64 54 0.09 11 0 25 43 64 53 0.09 12 0 26 42 63 53 0.09 12 0 27 42 63 52 0.1 13 0 28 42 62 52 0.1 13 0 29 41 62 52 0.1 13 0 30 41 61 51 0.1 14 0 31 41 61 51 0.11 14 0 Month 46 68 57 2.7 270 18 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