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: Thursday, 05-Feb-2026 05:00 am

Today Mostly Cloudy	Tonight Partly Cloudy	Friday Mostly Sunny	Friday night Partly Cloudy	Saturday Partly Cloudy	Saturday night Partly Cloudy	Sunday Partly Cloudy	Sunday night Clear

High: 45°	Low: 26°	High: 54°	Low: 27°	High: 46°	Low: 24°	High: 55°	Low: 25°
	WCh: 20°				WCh: 18°
SSW 5-23 mph	WSW 5-19 mph	NW 10-25→13-31 mph	NNW 7-26 mph	NNE→ESE 4-25 mph	ESE 7-23 mph	SE 7-23 mph	ESE 4-19 mph

Today	Mostly cloudy to cloudy in the morning, becoming partly to mostly cloudy in the afternoon. High 45°. Wind south-southwest around 5 mph, gusting to 23 mph.
Tonight	Partly cloudy in the evening, becoming mostly clear after midnight. Low 26°. Wind chill ranging from 20 to 40. Wind west-southwest around 5 mph, gusting to 19 mph.
Friday	Mostly sunny in the morning, becoming partly to mostly sunny in the afternoon. Breezy and relatively mild. High 54°. Wind northwest around 10 mph, gusting to 25 mph, in the morning, becoming 13 mph, gusting to 31 mph, in the afternoon.
Friday night	Fair in the evening, becoming partly cloudy after midnight. Low 27°. Wind north-northwest around 7 mph, gusting to 26 mph.
Saturday	Partly cloudy in the morning, becoming partly to mostly sunny in the afternoon. High 46°. Wind north-northeast around 4 mph, gusting to 25 mph, in the morning, becoming east-southeast in the afternoon.
Saturday night	Partly cloudy. Low 24°. Wind chill ranging from 18 to 39. Wind east-southeast around 7 mph, gusting to 23 mph.
Sunday	Partly cloudy in the morning, becoming sunny in the afternoon. Relatively mild. High 55°. Wind southeast around 7 mph, gusting to 23 mph.
Sunday night	Clear. Low 25°. Wind east-southeast around 4 mph, gusting to 19 mph.
Monday	Sunny. Unusually mild. High 63°. Wind south-southwest around 2 mph, gusting to 19 mph.
Monday night	Clear. Low 33°. Wind south-southwest around 5 mph.
Tuesday	Mostly sunny in the morning, becoming partly to mostly cloudy in the afternoon. Exceptionally warm. High 73°. Wind south-southwest around 6 mph, gusting to 19 mph.
Tuesday night	Cloudy in the evening, becoming dense overcast after midnight. A chance of rain. Relatively mild. Low 49°. Wind south-southwest around 5 mph. Chance of precipitation 50 percent. Precipitation mostly less than a tenth of an inch.
Wednesday	Dense overcast. Patchy light fog in the morning. A chance of rain. Relatively mild. High 51°, but temperatures falling in the afternoon. Wind north-northwest around 6 mph, gusting to 19 mph. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Wednesday night	Dense overcast in the evening, becoming cloudy after midnight. Patchy light fog. A chance of rain in the evening, then a slight chance of rain after midnight. Low 36°. Wind north-northwest around 5 mph, gusting to 19 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.

WXSIM forecast formatting script by Saratoga-Weather.org.

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