Monthly Historical AveragesO'Fallon, MO
Average Temperature
High
19°
Feels 19
Low
8°
Feels 6
Average Precipitation
11 Days
118.6mm
0.2cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, April 12, 2026
Day
25°Feels 25
Wind
25 km/h S
Gust
38 km/h
Humidity
51%
P.O.P
40%
Rain
<1 mm
Night
18°Feels 18
Wind
24 km/h SW
Gust
36 km/h
Humidity
92%
P.O.P
100%
Rain
5-10 mm
Historical AveragesApr 12
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity