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, 09-Feb-2026 05:00 am

Today Mostly Sunny	Tonight Clear	Tuesday Sunny	Tuesday night Partly Cloudy	Wednesday Mostly Sunny	Wednesday night Mostly Cloudy	Thursday Mostly Cloudy	Thursday night Mostly Cloudy
							<.1 in.
High: 61°	Low: 39°	High: 65°	Low: 31°	High: 53°	Low: 29°	High: 46°	Low: 35°

SSE 2-16 mph	S 7 mph	WSW→NNW 8-27 mph	NNW 6-22 mph	NNW 4-21 mph	N→ENE 2-17 mph	SE 5-18 mph	SE 6-17 mph

Today	Sunny in the morning, becoming partly to mostly sunny in the afternoon. Unusually mild. High 61°. Wind south-southeast around 2 mph, gusting to 16 mph.
Tonight	Clear. Low 39°. Wind south around 7 mph.
Tuesday	Sunny. Unusually mild. High 65°. Wind west-southwest around 8 mph, gusting to 27 mph, in the morning, becoming north-northwest in the afternoon.
Tuesday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 31°. Wind north-northwest around 6 mph, gusting to 22 mph.
Wednesday	Mostly sunny in the morning, becoming sunny in the afternoon. Relatively mild. High 53°. Wind north-northwest around 4 mph, gusting to 21 mph.
Wednesday night	Fair in the evening, becoming partly to mostly cloudy after midnight. Low 29°. Wind north around 2 mph, gusting to 17 mph, in the evening, becoming east-northeast after midnight.
Thursday	Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. High 46°. Wind southeast around 5 mph, gusting to 18 mph.
Thursday night	Mostly cloudy to cloudy in the evening, becoming partly to mostly cloudy after midnight. A slight chance of rain. Low 35°. Wind southeast around 6 mph, gusting to 17 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Friday	Partly to mostly cloudy in the morning, becoming mostly cloudy in the afternoon. Relatively mild. High 54°. Wind southeast around 6 mph, gusting to 23 mph.
Friday night	Mostly cloudy to cloudy. Low 36°. Wind east-southeast around 5 mph, gusting to 20 mph.
Saturday	Dense overcast. Patchy light fog in the afternoon. Rain likely. High 41°. Wind east around 5 mph. Chance of precipitation 80 percent. Precipitation mostly around an inch.
Saturday night	Cloudy in the evening, becoming mostly cloudy after midnight. Light to moderate fog in the evening, then moderate fog after midnight. Rain likely. Low 32°. Wind northeast around 5 mph. Chance of precipitation 60 percent. Precipitation mostly around a quarter of an inch.
Sunday	Sunny. Moderate fog in the morning. Relatively mild. High 55°. Wind northeast around 7 mph, gusting to 22 mph.
Sunday night	Clear in the evening, becoming partly cloudy after midnight. Low 34°. Wind east around 3 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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