Monthly Climatological Summary for Dec 2025

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  24.2  26.2   13:51  21.8   23:50  40.8   0.0  0.00   1.4  11.0   09:17    SE
02  23.4  26.5   15:23  21.0   20:54  41.6   0.0  0.00   2.9  16.0   01:41     W
03  28.9  37.3   14:42  16.9   06:49  36.1   0.0  0.28   2.3  21.0   23:27    SW
04  19.8  27.4   00:00  12.3   23:53  45.2   0.0  0.00   2.8  18.0   00:35     N
05  28.1  43.6   15:26  10.5   04:51  36.9   0.0  0.00   2.5  15.0   13:45   SSW
06  38.9  47.1   11:55  30.2   06:38  26.1   0.0  0.00   2.2  12.0   23:37     S
07  35.0  41.3   00:00  25.8   23:21  30.0   0.0  0.00   4.5  18.0   11:42   NNW
08  27.8  34.6   14:07  22.3   07:08  37.2   0.0  0.00   2.6  12.0   21:20   ENE
09  45.8  57.2   14:26  33.6   00:00  19.2   0.0  0.00   6.7  23.0   22:13    SW
10  38.8  52.2   04:11  24.9   21:11  26.2   0.0  0.00   8.4  40.0   07:40   WNW
11  31.4  35.1   13:57  26.0   04:46  33.6   0.0  0.00   3.3  16.0   15:12    SE
12  33.3  35.7   14:31  31.5   07:40  31.7   0.0  0.00   2.7  13.0   02:49   NNW
13  21.2  33.0   03:49   8.1   23:56  43.8   0.0  0.00   4.7  16.0   08:05     N
14  11.1  18.9   14:24   5.8   07:11  53.8   0.0  0.00   3.4  15.0   00:00    NW
15  26.5  46.0   15:10  12.2   02:02  38.4   0.0  0.00   4.2  21.0   08:30   SSW
16  42.6  57.9   14:39  26.6   02:33  22.4   0.0  0.00   4.2  19.0   10:56   SSW
17  47.2  56.1   14:48  37.5   08:03  17.8   0.0  0.00   3.0  19.0   23:46     S
18  46.1  58.4   09:18  25.1   22:59  18.9   0.0  0.38   9.1  33.0   10:18   WSW
----------------------------------------------------------------------------------
    31.7  58.4    18     5.8    14   599.7   0.0  0.66   3.9  40.0    10     WSW

Max >=  90.0  0
Max <=  32.0  4
Min <=  32.0 16
Min <=   0.0  0
Max Rain: 0.38 on day 18
Days of Rain: 2 (>= 0.01 in)  2 (>= 0.10 in)  0 (>= 1.00 in)
Heat Base: 65.0  Cool Base: 65.0  Method: Integration