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Monthly Climatological Summary for Sep 2025
Name: OFallon Weather City: OFallon State: MO
Elevation: 532 ft Lat: N 38° 50' 20" Lon: W 090° 43' 42"
Temperature (°F), Rain (in), Wind Speed (mph)
Heat Cool Avg
Mean Deg Deg Wind Dom
Day Temp High Time Low Time Days Days Rain Speed High Time Dir
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01 68.8 78.4 13:10 59.0 06:10 1.4 5.2 0.00 1.4 11.0 15:53 ENE
02 70.6 83.8 15:13 61.3 06:40 0.7 6.3 0.03 1.2 10.0 13:28 NNW
03 72.1 86.8 15:41 58.7 03:03 1.7 8.8 0.00 2.8 22.0 23:38 WNW
04 65.8 76.9 16:27 56.3 07:19 2.4 3.2 0.00 2.3 17.0 00:00 WNW
05 64.8 73.4 13:00 58.8 00:47 2.1 1.9 0.00 3.2 15.0 12:22 WNW
06 65.0 78.0 15:33 48.8 06:54 3.9 3.8 0.00 2.7 18.0 15:10 WNW
07 60.3 74.0 14:50 46.7 07:15 7.3 2.6 0.00 1.8 14.0 12:47 NNE
08 61.0 78.0 16:05 45.1 06:41 7.6 3.7 0.00 1.5 14.0 12:26 SSE
09 64.8 81.9 15:55 49.5 02:43 5.5 5.4 0.00 1.2 15.0 14:25 S
10 73.2 90.6 15:22 57.8 02:41 1.6 9.8 0.00 1.0 11.0 13:53 WNW
11 75.3 91.3 13:54 60.9 06:21 0.7 11.0 0.00 1.2 10.0 13:32 ENE
12 78.0 94.2 15:29 61.4 06:42 0.6 13.6 0.00 1.5 14.0 13:00 SE
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68.3 94.2 12 45.1 8 35.5 75.2 0.03 1.8 22.0 3 NW
Max >= 90.0 3
Max <= 32.0 0
Min <= 32.0 0
Min <= 0.0 0
Max Rain: 0.03 on day 2
Days of Rain: 1 (>= 0.01 in) 0 (>= 0.10 in) 0 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration