OFallon Missouri Weather

OFallon - Weather Data from OFallon, MO

Latitude: N 38° 50' 20" Longitude: W 90° 43' 42" Altitude: 532 ft

CST UTC Last station update CST

WXSIM Forecast for: O'Fallon
Issued by: OFallonweather.com

Updated: Saturday, 07-Nov-2026 05:00 am

Today Partly Cloudy	Tonight Clear	Sunday Mostly Sunny	Sunday night Clear	Monday Sunny	Monday night Clear	Tuesday Sunny	Tuesday night Partly Cloudy

High: 54°	Low: 29°	High: 63°	Low: 33°	High: 67°	Low: 37°	High: 70°	Low: 42°

W 2-25 mph	SW 3 mph	SW 6-22 mph	W 4 mph	SSW 3-21 mph	SSW 4 mph	WSW 4-20 mph	WSW 2 mph

Today	Partly cloudy. High 54°. Wind west around 2 mph, gusting to 25 mph.
Tonight	Clear. Low 29°. Wind southwest around 3 mph.
Sunday	Partly to mostly sunny in the morning, becoming sunny in the afternoon. Mild. High 63°. Wind southwest around 6 mph, gusting to 22 mph.
Sunday night	Clear. Low 33°. Wind west around 4 mph.
Monday	Sunny. Mild. High 67°. Wind south-southwest around 3 mph, gusting to 21 mph.
Monday night	Clear. Low 37°. Wind south-southwest around 4 mph.
Tuesday	Sunny. Mild. High 70°. Wind west-southwest around 4 mph, gusting to 20 mph.
Tuesday night	Clear in the evening, becoming partly cloudy after midnight. Low 42°. Wind west-southwest around 2 mph.
Wednesday	Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. A chance of rain. Mild. High 63°. Wind southwest around 4 mph in the morning, becoming west-northwest around 8 mph, gusting to 23 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Wednesday night	Mostly cloudy to cloudy. A chance of rain. Low 47°. Wind north-northwest around 9 mph, gusting to 22 mph. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Thursday	Mostly cloudy to cloudy. A chance of rain. Breezy. High 52°. Wind north-northwest around 13 mph, gusting to 29 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Thursday night	Mostly cloudy to cloudy in the evening, becoming partly to mostly cloudy after midnight. Breezy. Low 37°. Wind chill ranging from 31 to 44. Wind north-northwest around 16 mph, gusting to 33 mph.
Friday	Partly cloudy in the morning, becoming mostly cloudy in the afternoon. Breezy. High 44°. Wind north around 15 mph, gusting to 31 mph.
Friday night	Clear. Cold. Low 30°. Wind chill ranging from 24 to 36. Wind north around 8 mph, gusting to 24 mph.

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