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Monthly Climatological Summary for May 2015
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 55.4 69.9 16:17 40.0 06:42 10.3 0.7 0.00 1.0 10.0 12:07 ESE
02 65.8 79.1 17:14 50.8 05:19 3.9 4.7 0.00 2.2 13.0 09:13 SSW
03 72.7 82.8 15:57 62.2 06:32 0.2 7.9 0.00 5.4 20.0 11:16 SSW
04 74.7 83.7 17:41 65.7 06:26 0.0 9.7 0.01 4.1 19.0 16:03 SW
05 74.8 83.6 13:53 66.1 06:28 0.0 9.8 0.00 4.2 18.0 15:24 SSW
06 74.4 84.1 15:53 61.7 05:21 0.2 9.7 0.00 5.0 24.0 14:45 S
07 73.0 83.5 15:49 64.0 05:07 0.1 8.1 0.06 4.8 22.0 14:23 S
08 66.1 70.9 15:45 62.3 06:00 0.5 1.6 0.63 0.8 14.0 10:08 W
09 65.8 70.6 17:46 62.2 06:52 0.7 1.5 0.10 1.8 11.0 12:16 ENE
10 69.8 81.3 14:24 63.7 06:18 0.1 4.8 0.42 3.0 31.0 16:52 S
11 64.6 70.7 17:17 56.0 23:57 1.5 1.1 0.35 5.5 26.0 14:59 WSW
12 58.0 67.9 17:50 49.0 06:16 7.4 0.4 0.00 4.7 24.0 09:28 NW
13 58.6 70.0 16:56 45.5 05:52 7.2 0.8 0.00 3.1 16.0 13:37 E
14 63.3 74.0 19:19 56.1 09:38 3.6 1.9 0.09 4.0 18.0 11:20 S
15 70.3 83.0 12:47 65.6 05:37 0.0 5.3 0.57 3.8 26.0 14:25 SSW
16 71.3 77.6 17:03 65.6 06:37 0.0 6.3 0.01 4.7 18.0 13:37 S
17 72.7 80.5 16:21 64.0 06:50 0.0 7.7 0.10 6.0 25.0 05:41 SSW
18 70.8 80.5 14:03 59.2 23:57 0.3 6.1 0.00 3.4 19.0 16:47 NW
19 55.0 62.9 17:26 45.9 06:01 10.0 0.0 0.00 3.4 14.0 09:51 N
20 49.4 54.5 02:18 45.2 15:09 15.6 0.0 0.34 3.9 16.0 05:03 ENE
21 53.7 65.7 18:19 45.5 03:55 11.3 0.0 0.00 3.1 13.0 07:51 NW
22 63.2 73.9 15:01 50.4 06:05 4.6 2.8 0.00 2.7 11.0 04:34 W
23 68.7 77.4 13:32 59.5 05:06 1.4 5.1 0.00 2.7 19.0 14:10 S
24 73.0 84.5 16:35 64.8 01:58 0.0 8.0 0.27 6.3 29.0 13:17 S
25 74.4 84.2 17:44 67.4 07:38 0.0 9.4 0.00 6.7 20.0 00:05 SSW
26 72.7 78.3 17:56 65.9 07:37 0.0 7.7 0.30 6.1 24.0 09:36 SW
27 72.9 81.4 16:53 63.3 23:50 0.0 8.0 0.00 3.9 22.0 07:34 W
28 70.2 81.8 12:16 58.5 05:45 1.2 6.4 0.21 1.8 27.0 14:46 SSE
29 74.4 80.9 14:04 65.9 23:51 0.0 9.4 0.22 3.5 21.0 22:41 SW
30 67.4 74.1 16:49 60.1 23:58 0.3 2.6 0.34 2.7 16.0 18:09 NNW
31 55.7 60.1 00:00 52.5 05:40 9.3 0.0 0.01 3.5 13.0 01:00 NNE
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66.9 84.5 24 40.0 1 89.7 147.5 4.03 3.8 31.0 10 SSW
Max >= 90.0 0
Max <= 32.0 0
Min <= 32.0 0
Min <= 0.0 0
Max Rain: 0.63 on day 8
Days of Rain: 17 (>= 0.01 in) 12 (>= 0.10 in) 0 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration