Monthly Climatological Summary for Sep 2026

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
----------------------------------------------------------------------------------
01  86.6 100.3   14:33  71.0   06:42   0.0  21.2  0.00   2.5  16.0   16:22    SW
02  88.9 100.8   14:43  77.4   07:12   0.0  23.9  0.00   3.6  17.0   11:34    SW
03  88.8  99.6   15:51  76.2   07:09   0.0  23.8  0.00   3.2  16.0   10:33    SW
04  88.5 100.3   13:21  75.7   07:01   0.0  23.5  0.00   2.6  15.0   11:35    SW
05  87.9 102.9   14:21  75.7   07:00   0.0  22.9  0.00   1.9  19.0   14:22    NW
06  80.7  90.4   16:03  72.2   06:53   0.0  15.7  0.00   3.3  16.0   14:31   ENE
07  76.3  88.6   15:24  65.5   06:14   0.0  11.3  0.00   2.6  13.0   11:36   ESE
08  78.5  92.0   17:41  62.0   06:18   0.4  13.9  0.00   1.8  11.0   10:45     S
09  83.6  94.1   15:49  72.7   23:58   0.0  18.6  0.12   2.8  17.0   10:58     N
10  73.5  78.9   16:36  70.3   23:56   0.0   8.5  0.20   0.9  12.0   01:32   WSW
11  75.5  83.6   16:49  69.0   01:46   0.0  10.5  0.00   1.4  11.0   12:14   ESE
12  78.9  94.6   16:07  66.2   07:12   0.0  13.9  0.00   1.5  16.0   16:20     W
13  74.7  87.2   13:20  64.7   23:57   0.0   9.7  0.00   2.3  16.0   14:13     N
14  74.3  87.6   16:56  61.2   06:48   0.7  10.1  0.00   4.6  17.0   16:34    SE
15  86.2  99.1   15:34  75.7   06:56   0.0  21.2  0.00   4.1  18.0   13:37   SSW
16  82.8  93.8   15:15  73.7   06:35   0.0  17.8  0.00   2.4  15.0   03:28   SSE
17  81.5  99.6   14:11  73.5   03:36   0.0  16.5  2.01   2.4  49.0   15:41    SW
18  82.9  97.7   15:38  72.5   06:55   0.0  17.9  0.00   0.9  11.0   13:55    SE
19  85.0  96.4   14:52  76.6   01:35   0.0  20.0  0.00   3.1  18.0   12:28    SW
20  80.7  91.4   14:48  70.1   07:22   0.0  15.7  0.36   2.2  20.0   03:29   SSE
21  68.4  72.1   00:00  65.9   23:44   0.0   3.4  0.29   2.3  16.0   00:00   NNE
22  66.4  70.8   16:22  62.2   23:58   0.3   1.7  0.00   2.7  13.0   23:43   ENE
23  63.5  72.0   14:48  55.8   04:11   2.8   1.4  0.00   2.1  14.0   13:10   NNE
24  63.3  67.8   17:07  57.8   23:58   2.0   0.4  0.00   1.4  11.0   01:21    NE
25  64.7  75.2   16:05  55.9   05:57   3.1   2.8  0.00   1.2  12.0   10:48   ESE
26  63.0  67.4   12:26  57.7   21:48   2.3   0.4  0.00   1.0  12.0   14:56   ESE
27  64.3  73.8   16:20  57.9   08:23   2.7   2.0  0.04   0.7   9.0   11:23     E
28  66.9  80.6   15:36  56.6   23:54   2.9   4.8  0.00   0.9  10.0   10:10     E
29  67.9  82.9   15:44  51.8   07:03   4.1   6.9  0.00   1.5  14.0   13:32     S
30  77.4  89.4   15:26  67.4   05:00   0.0  12.4  0.00   2.7  15.0   09:14   SSW
----------------------------------------------------------------------------------
    76.7 102.9     5    51.8    29    21.3 372.7  3.02   2.2  49.0    17     SSE

Max >=  90.0 15
Max <=  32.0  0
Min <=  32.0  0
Min <=   0.0  0
Max Rain: 2.01 on day 17
Days of Rain: 6 (>= 0.01 in)  5 (>= 0.10 in)  1 (>= 1.00 in)
Heat Base: 65.0  Cool Base: 65.0  Method: Integration