Monthly Historical AveragesO'Fallon, MO
Average Temperature
High
6°
Feels 4
Low
-2°
Feels -6
Average Precipitation
9 Days
61.4mm
9.7cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastSaturday, December 27, 2025
Day
15°Feels 14
Wind
18 km/h SE
Gust
27 km/h
Humidity
78%
P.O.P
30%
Night
14°Feels 13
Wind
18 km/h S
Gust
27 km/h
Humidity
96%
P.O.P
40%
Rain
<1 mm
Historical AveragesDec 27
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity