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Monthly Climatological Summary for Sep 2026
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 86.6 100.3 14:33 71.0 06:42 0.0 21.2 0.00 2.5 16.0 16:22 SW
02 88.9 100.8 14:43 77.4 07:12 0.0 23.9 0.00 3.6 17.0 11:34 SW
03 88.8 99.6 15:51 76.2 07:09 0.0 23.8 0.00 3.2 16.0 10:33 SW
04 88.5 100.3 13:21 75.7 07:01 0.0 23.5 0.00 2.6 15.0 11:35 SW
05 87.9 102.9 14:21 75.7 07:00 0.0 22.9 0.00 1.9 19.0 14:22 NW
06 80.7 90.4 16:03 72.2 06:53 0.0 15.7 0.00 3.3 16.0 14:31 ENE
07 76.3 88.6 15:24 65.5 06:14 0.0 11.3 0.00 2.6 13.0 11:36 ESE
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85.4 102.9 5 65.5 7 0.0 142.3 0.00 2.8 19.0 5 SSW
Max >= 90.0 6
Max <= 32.0 0
Min <= 32.0 0
Min <= 0.0 0
Max Rain: 0.00 on day 0
Days of Rain: 0 (>= 0.01 in) 0 (>= 0.10 in) 0 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration