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Monthly Climatological Summary for May 2023
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 55.3 63.9 16:31 45.6 06:29 9.7 0.0 0.00 8.9 32.0 10:39 WNW
02 54.1 65.7 16:09 43.8 06:13 10.9 0.0 0.00 7.1 30.0 15:41 WNW
03 55.3 70.1 17:38 40.5 06:24 10.5 0.8 0.00 3.2 16.0 12:06 NW
04 59.4 75.2 14:48 37.2 06:27 8.7 3.1 0.00 2.1 13.0 18:10 S
05 62.6 73.6 15:57 51.3 02:42 4.4 1.9 0.00 4.5 21.0 15:01 S
06 69.9 80.7 16:30 61.3 03:39 1.2 6.1 0.00 5.7 23.0 18:55 SSE
07 79.6 91.9 15:44 69.5 23:55 0.0 14.6 0.00 5.3 22.0 16:26 SSW
08 71.5 84.6 17:10 61.1 06:41 0.8 7.2 0.24 4.6 23.0 00:39 E
09 65.8 75.7 16:03 58.7 05:27 2.1 2.9 0.00 3.1 15.0 07:58 E
10 70.8 82.3 15:18 60.7 03:47 1.0 6.9 0.00 3.2 15.0 11:42 SE
11 71.1 78.4 17:48 62.4 05:11 0.2 6.4 0.15 3.0 22.0 21:01 SE
12 72.7 82.9 17:26 65.4 06:29 0.0 7.7 0.15 2.4 11.0 05:15 S
13 72.9 82.7 11:32 65.6 05:39 0.0 7.9 1.95 2.3 29.0 13:44 SSE
14 73.1 87.5 15:58 65.9 06:40 0.0 8.1 0.04 1.7 18.0 17:35 E
15 65.8 71.8 15:12 60.0 09:31 1.2 2.0 0.06 2.9 11.0 11:19 NE
16 62.3 69.9 17:48 56.7 07:49 3.2 0.5 0.42 2.6 12.0 16:13 NW
17 67.3 80.9 15:36 53.5 05:36 3.1 5.4 0.01 1.8 10.0 19:42 NNW
18 69.0 82.0 16:54 55.4 06:23 2.4 6.4 0.00 1.5 11.0 12:35 SSW
19 65.9 78.0 12:32 56.6 23:38 2.1 3.0 0.00 3.7 15.0 15:33 WNW
20 60.9 72.1 16:25 48.2 06:11 5.7 1.6 0.00 2.7 14.0 12:49 N
21 63.8 78.3 16:07 47.0 04:59 5.7 4.5 0.00 1.4 11.0 12:41 SSE
22 66.4 80.6 16:25 49.6 05:59 4.4 5.8 0.00 1.4 14.0 12:45 ESE
23 70.0 85.0 17:49 52.3 05:39 3.2 8.3 0.00 1.7 13.0 14:11 ESE
24 74.9 85.9 16:20 63.6 23:56 0.1 10.0 0.01 1.7 15.0 15:09 E
25 68.3 79.1 16:36 57.0 23:58 1.5 4.8 0.00 2.8 15.0 15:18 ENE
26 63.6 76.5 16:59 51.6 06:08 4.6 3.2 0.00 2.6 14.0 12:38 ENE
27 65.3 80.4 15:39 48.7 05:39 5.0 5.3 0.00 1.8 14.0 14:36 E
28 68.3 81.2 16:55 53.1 05:22 3.2 6.5 0.00 1.6 13.0 11:33 E
29 70.1 86.2 17:13 51.1 05:20 3.3 8.4 0.00 0.9 7.0 14:37 W
30 73.2 88.4 16:12 54.8 05:07 2.3 10.5 0.00 1.3 9.0 16:49 SSW
31 75.7 88.3 15:30 61.4 06:04 0.3 11.0 0.00 1.7 12.0 13:03 S
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67.3 91.9 7 37.2 4 100.8 170.8 3.03 2.9 32.0 1 SSE
Max >= 90.0 1
Max <= 32.0 0
Min <= 32.0 0
Min <= 0.0 0
Max Rain: 1.95 on day 13
Days of Rain: 9 (>= 0.01 in) 5 (>= 0.10 in) 1 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration