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: Monday, 26-Jan-2026 05:00 am

Today Partly Cloudy Cold!	Tonight Fair Cold!	Tuesday Mostly Sunny Cold!	Tuesday night Partly Cloudy	Wednesday Mostly Sunny	Wednesday night Mostly Cloudy	Thursday Mostly Cloudy	Thursday night Partly Cloudy

High: 17°	Low: 7°	High: 31°	Low: 10°	High: 37°	Low: 17°	High: 28°	Low: 15°
WCh: -17°	WCh: -6°	WCh: -5°					WCh: 7°
W 6-23 mph	WSW 9-21 mph	W 8-25 mph	WNW 3-21 mph	WSW 4-21 mph	WNW→N 3-18 mph	N 4-20 mph	N 4-22 mph

Today	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Cold. High 17°. Wind chill ranging from -17 to 6. Wind west around 6 mph, gusting to 23 mph.
Tonight	Fair. Cold. Low 7°. Wind chill ranging from -6 to 5. Wind west-southwest around 9 mph, gusting to 21 mph.
Tuesday	Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. High 31°. Wind chill ranging from -5 to 23. Wind west around 8 mph, gusting to 25 mph.
Tuesday night	Fair to partly cloudy. Cold. Low 10°. Wind west-northwest around 3 mph, gusting to 21 mph.
Wednesday	Mostly sunny in the morning, becoming partly to mostly sunny in the afternoon. High 37°. Wind west-southwest around 4 mph, gusting to 21 mph.
Wednesday night	Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Low 17°. Wind west-northwest around 3 mph, gusting to 18 mph, in the evening, becoming north after midnight.
Thursday	Mostly cloudy to cloudy. High 28°. Wind north around 4 mph, gusting to 20 mph.
Thursday night	Fair to partly cloudy in the evening, becoming mostly cloudy after midnight. Cold. Low 15°. Wind chill ranging from 7 to 23. Wind north around 4 mph, gusting to 22 mph.
Friday	Mostly cloudy. Cold. High 19°. Wind chill around 5. Wind north around 9 mph, gusting to 28 mph.
Friday night	Mostly clear in the evening, becoming fair after midnight. Cold. Low 8°. Wind chill ranging from -2 to 7. Wind north-northwest around 6 mph, gusting to 21 mph.
Saturday	Partly cloudy in the morning, becoming mostly cloudy in the afternoon. Cold. High 22°. Wind chill ranging from -3 to 13. Wind north-northwest around 7 mph, gusting to 25 mph.
Saturday night	Clear in the evening, becoming mostly clear after midnight. Low 12°. Wind west-northwest around 3 mph, gusting to 17 mph.
Sunday	Mostly sunny in the morning, becoming sunny in the afternoon. High 40°. Wind west-southwest around 4 mph, gusting to 22 mph.
Sunday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 22°. Wind south around 3 mph, gusting to 15 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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