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Monthly Climatological Summary for May 2009
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 55.2 61.9 03:29 47.5 23:59 9.8 0.0 0.04 3.5 21.0 11:51 W
02 56.1 65.1 16:31 47.1 00:26 8.9 0.0 0.01 1.7 12.0 15:34 SSE
03 57.9 64.2 14:21 50.3 05:53 7.1 0.0 0.00 1.7 14.0 12:36 NNE
04 58.7 69.2 17:56 47.7 06:35 7.1 0.8 0.00 1.9 11.0 15:12 E
05 63.2 74.9 16:24 48.6 04:49 4.9 3.1 0.00 2.2 15.0 13:58 SW
06 62.8 69.8 16:28 57.4 05:24 3.1 0.9 0.13 3.1 15.0 15:10 SSW
07 68.2 81.5 18:19 58.1 06:03 2.2 5.4 0.05 3.4 15.0 14:36 NNW
08 63.8 71.4 18:41 59.1 12:35 2.4 1.2 0.65 2.4 19.0 12:37 W
09 60.2 67.4 17:16 52.7 23:54 5.1 0.3 0.00 4.3 18.0 09:08 WNW
10 56.6 65.3 11:58 44.5 06:04 8.4 0.0 0.00 2.5 13.0 13:30 WNW
11 60.3 70.1 17:29 52.2 23:29 5.4 0.8 0.00 2.4 14.0 12:46 SE
12 61.9 73.0 15:29 47.2 05:52 5.4 2.3 0.00 5.0 27.0 14:52 SSE
13 70.2 83.3 14:46 59.9 04:47 1.1 6.3 0.13 7.2 32.0 09:19 NW
14 65.4 74.7 17:10 58.3 06:17 1.7 2.2 0.00 2.7 15.0 00:02 ESE
15 69.6 84.1 15:23 59.6 00:01 1.6 6.2 0.57 5.6 44.0 18:41 SSE
16 57.9 62.3 01:52 47.4 23:59 7.1 0.0 0.01 5.5 23.0 17:15 NW
17 53.7 64.4 17:05 39.4 06:01 11.3 0.0 0.00 2.5 14.0 13:33 ENE
18 59.2 71.5 16:41 44.0 05:23 7.0 1.2 0.00 3.9 18.0 09:31 SSE
19 66.1 80.8 17:08 46.8 05:47 4.3 5.4 0.00 3.9 15.0 09:00 S
20 69.3 81.6 17:20 51.8 06:11 2.2 6.5 0.00 4.4 18.0 10:31 S
21 71.9 84.3 17:28 55.5 06:27 1.6 8.5 0.00 2.0 16.0 12:35 SSE
22 74.4 84.8 14:26 62.1 05:09 0.3 9.7 0.00 1.2 9.0 11:34 SW
23 74.0 83.7 14:52 64.6 06:06 0.0 9.0 0.00 1.7 11.0 07:12 SSW
24 71.9 82.9 14:44 65.7 05:36 0.0 6.9 0.00 2.0 18.0 15:42 NE
25 67.2 74.0 15:05 61.9 06:59 0.6 2.8 1.05 3.2 16.0 21:51 ENE
26 72.3 80.8 17:29 66.6 05:26 0.0 7.3 0.18 4.1 25.0 14:06 S
27 70.3 80.1 15:46 64.2 23:53 0.0 5.4 0.50 2.9 13.0 21:57 W
28 60.4 64.7 19:51 57.1 07:12 4.6 0.0 0.48 3.1 13.0 09:30 NW
29 67.6 80.2 17:08 52.2 05:51 3.2 5.8 0.00 3.0 12.0 10:48 WNW
30 71.4 85.9 16:56 59.2 07:09 1.1 7.5 0.03 4.4 28.0 17:15 W
31 69.8 80.7 15:26 53.5 05:49 1.6 6.4 0.00 2.3 13.0 18:11 SSE
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64.8 85.9 30 39.4 17 119.1 111.9 3.83 3.2 44.0 15 SW
Max >= 90.0 0
Max <= 32.0 0
Min <= 32.0 0
Min <= 0.0 0
Max Rain: 1.05 on day 25
Days of Rain: 13 (>= 0.01 in) 8 (>= 0.10 in) 1 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration