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: Wednesday, 04-Feb-2026 05:00 am

Today Partly Cloudy	Tonight Partly Cloudy	Thursday Mostly Cloudy	Thursday night Partly Cloudy	Friday Sunny	Friday night Partly Cloudy	Saturday Mostly Sunny	Saturday night Partly Cloudy

High: 42°	Low: 21°	High: 45°	Low: 25°	High: 53°	Low: 25°	High: 44°	Low: 22°
							WCh: 15°
N 3-24 mph	N→SSW 1-21 mph	SSW 5-23 mph	W 5-18 mph	WNW 9-27 mph	NNW 7-23 mph	NE→ESE 5-26 mph	SE 7-22 mph

Today	Partly cloudy. High 42°. Wind north around 3 mph, gusting to 24 mph.
Tonight	Fair to partly cloudy. Low 21°. Wind north around 1 mph, gusting to 21 mph, in the evening, becoming south-southwest after midnight.
Thursday	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.
Thursday night	Partly cloudy in the evening, becoming clear after midnight. Low 25°. Wind west around 5 mph, gusting to 18 mph.
Friday	Sunny. Relatively mild. High 53°. Wind west-northwest around 9 mph, gusting to 27 mph.
Friday night	Clear in the evening, becoming partly cloudy after midnight. Low 25°. Wind north-northwest around 7 mph, gusting to 23 mph.
Saturday	Partly to mostly sunny. High 44°. Wind northeast around 5 mph, gusting to 26 mph, in the morning, becoming east-southeast in the afternoon.
Saturday night	Partly cloudy. Low 22°. Wind chill ranging from 15 to 36. Wind southeast around 7 mph, gusting to 22 mph.
Sunday	Partly cloudy. Relatively mild. High 53°. Wind south-southeast around 7 mph, gusting to 22 mph.
Sunday night	Clear. Low 25°. Wind east-southeast around 3 mph, gusting to 19 mph, in the evening, becoming southwest after midnight.
Monday	Mostly sunny in the morning, becoming partly cloudy in the afternoon. Unusually mild. High 65°. Wind west-southwest around 4 mph, gusting to 17 mph.
Monday night	Mostly cloudy in the evening, becoming mostly clear after midnight. Patchy light fog after midnight. A chance of rain. Low 39°. Wind south-southwest around 7 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Tuesday	Sunny in the morning, becoming mostly cloudy in the afternoon. Patchy light fog in the morning. Relatively mild. High 59°. Wind west-southwest around 7 mph, gusting to 19 mph, in the morning, becoming west-northwest around 11 mph, gusting to 25 mph, in the afternoon.
Tuesday night	Mostly cloudy to cloudy in the evening, becoming mostly cloudy after midnight. Low 32°. Wind chill ranging from 25 to 47. Wind north-northwest around 9 mph, gusting to 23 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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