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Monthly Climatological Summary for May 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 66.4 74.2 18:33 61.7 06:23 0.9 2.2 0.27 4.4 20.0 12:04 WSW
02 60.8 67.0 16:38 53.3 06:28 4.3 0.1 0.08 2.8 15.0 15:27 W
03 52.3 55.5 12:36 49.2 06:05 12.7 0.0 0.37 2.7 17.0 13:40 NW
04 54.9 64.5 16:22 44.3 06:36 10.1 0.0 0.00 2.9 16.0 10:59 NNW
05 52.4 59.3 15:23 45.8 03:28 12.6 0.0 0.00 1.7 13.0 09:24 N
06 58.8 72.3 16:44 42.5 05:36 7.9 1.7 0.00 1.5 11.0 14:27 SE
07 62.8 74.1 14:05 54.6 02:55 4.2 2.1 0.01 2.1 19.0 12:59 ESE
08 62.2 71.5 16:31 57.5 05:52 3.9 1.1 0.22 2.4 15.0 14:47 NNE
09 60.3 71.8 16:02 49.1 06:18 6.3 1.5 0.00 3.0 16.0 12:46 NE
10 62.1 78.2 16:05 44.2 06:00 7.0 4.1 0.00 1.2 11.0 12:52 ENE
11 66.3 80.4 16:36 52.2 06:07 3.9 5.1 0.00 2.0 12.0 11:45 E
12 65.0 71.3 16:19 57.3 03:55 2.0 2.0 0.03 1.3 11.0 13:53 E
13 68.9 79.8 16:16 61.6 04:43 0.9 4.8 0.01 1.3 11.0 12:13 S
14 73.1 83.9 14:55 59.3 05:31 1.0 9.1 0.00 3.7 19.0 16:08 SSE
15 77.8 89.0 16:14 66.8 23:55 0.0 12.8 0.00 4.7 23.0 18:45 SW
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62.9 89.0 15 42.5 6 77.6 46.6 0.99 2.5 23.0 15 SW
Max >= 90.0 0
Max <= 32.0 0
Min <= 32.0 0
Min <= 0.0 0
Max Rain: 0.37 on day 3
Days of Rain: 7 (>= 0.01 in) 3 (>= 0.10 in) 0 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration