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Monthly Climatological Summary for Sep 2021
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 72.6 83.5 16:00 64.8 23:59 0.0 7.6 0.01 2.7 15.0 14:40 NE
02 69.5 81.9 15:20 56.8 06:30 1.7 6.2 0.00 2.1 16.0 16:20 SE
03 69.9 78.2 17:50 60.1 06:05 1.0 5.8 0.07 2.8 14.0 09:55 SSW
04 72.9 77.1 16:40 69.3 23:25 0.0 7.9 0.28 3.4 19.0 10:45 NW
05 71.7 83.5 16:00 61.1 06:35 0.4 7.1 0.00 2.2 11.0 15:10 W
06 74.5 88.3 16:15 61.1 06:05 0.4 9.9 0.00 2.8 13.0 15:45 SSW
07 78.5 91.0 15:35 66.6 04:35 0.0 13.5 0.00 4.9 20.0 15:10 NNW
08 71.9 82.9 15:10 59.9 23:40 0.7 7.6 0.00 3.7 17.0 13:00 WNW
09 68.1 82.0 15:45 55.8 06:20 2.7 5.8 0.00 2.3 13.0 12:10 NNW
10 71.4 86.1 15:25 55.8 03:45 2.7 9.2 0.00 3.6 17.0 15:45 SSW
11 78.3 90.0 15:10 67.6 06:45 0.0 13.3 0.00 5.4 19.0 09:00 SSW
12 79.4 90.1 15:00 71.5 07:25 0.0 14.4 0.00 5.9 21.0 15:50 SSW
13 77.8 90.3 15:05 62.0 05:15 0.2 13.0 0.00 4.4 22.0 16:25 S
14 77.8 92.1 15:20 70.4 22:10 0.0 12.8 0.00 4.8 21.0 09:45 WNW
15 71.7 83.6 16:30 61.5 23:59 0.3 6.9 0.00 2.3 13.0 11:10 E
16 69.8 86.3 16:35 55.2 05:45 2.7 7.6 0.00 1.6 11.0 11:30 SSE
17 74.7 90.1 14:25 60.4 05:10 1.1 10.9 0.00 1.2 10.0 14:45 ENE
18 76.8 91.3 16:20 63.5 07:15 0.1 11.9 0.00 1.5 11.0 12:25 SE
19 75.2 87.2 16:40 65.1 06:55 0.0 10.2 0.00 2.9 18.0 15:40 SSE
20 78.2 87.3 15:40 69.7 07:05 0.0 13.2 0.00 5.2 19.0 10:55 S
21 65.2 77.8 00:05 58.9 23:59 1.3 1.5 0.68 4.1 19.0 00:25 NW
22 60.8 71.6 17:00 52.1 23:59 5.6 1.5 0.00 4.1 22.0 12:10 WNW
23 59.0 74.3 16:25 46.0 06:50 8.2 2.3 0.00 2.3 15.0 15:15 W
24 65.4 81.3 14:55 47.3 03:50 5.4 5.8 0.00 4.2 21.0 16:00 NW
25 62.2 76.9 16:45 51.5 05:25 5.6 2.8 0.06 2.9 16.0 12:35 SW
26 68.1 86.3 16:30 47.7 05:00 5.0 8.1 0.00 4.6 23.0 15:15 SSW
27 78.3 92.1 14:55 65.2 23:59 0.0 13.2 0.00 5.3 22.0 06:20 SW
28 75.1 91.8 14:45 58.5 07:20 0.7 10.9 0.00 1.9 11.0 09:50 S
29 73.8 87.9 14:55 60.0 07:10 0.9 9.6 0.00 1.7 15.0 15:55 S
30 70.9 86.8 13:35 63.4 06:30 0.2 6.1 0.00 1.5 21.0 16:00 SW
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72.0 92.1 14 46.0 23 46.9 256.6 1.10 3.3 23.0 26 SW
Max >= 90.0 9
Max <= 32.0 0
Min <= 32.0 0
Min <= 0.0 0
Max Rain: 0.68 on day 21
Days of Rain: 5 (>= 0.01 in) 2 (>= 0.10 in) 0 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration