Monthly Climatological Summary for May 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  54.1  63.2   15:11  40.4   06:28  10.9   0.0  0.00   2.9  16.0   15:12    NW
02  52.6  60.9   15:46  43.2   23:34  12.4   0.0  0.00   2.2  16.0   11:06     N
03  60.2  77.6   17:27  42.0   02:30   8.3   3.5  0.00   4.9  24.0   13:30    SW
04  68.6  81.0   16:30  56.8   03:28   1.6   5.2  0.00   4.5  28.0   13:35   SSW
05  51.8  71.7   00:01  45.2   18:53  13.6   0.4  0.83   3.2  21.0   00:00     N
06  51.7  62.6   15:28  43.2   23:28  13.3   0.0  0.13   2.6  13.0   12:52    NW
07  54.4  67.3   15:21  38.9   03:12  10.9   0.3  0.00   3.3  19.0   14:42   WSW
08  59.8  72.1   14:08  50.6   03:12   6.4   1.2  0.44   3.6  20.0   15:53   WSW
----------------------------------------------------------------------------------
    56.6  81.0     4    38.9     7    77.4  10.6  1.40   3.4  28.0     4       W

Max >=  90.0  0
Max <=  32.0  0
Min <=  32.0  0
Min <=   0.0  0
Max Rain: 0.83 on day 5
Days of Rain: 3 (>= 0.01 in)  3 (>= 0.10 in)  0 (>= 1.00 in)
Heat Base: 65.0  Cool Base: 65.0  Method: Integration