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: Friday, 05-Dec-2025 05:00 am

Today Mostly Sunny	Tonight Mostly Cloudy	Saturday Partly Cloudy	Saturday night Freezing Rain	Sunday Rain and Snow	Sunday night Partly Cloudy	Monday Sunny	Monday night Partly Cloudy
			<.1 in.	<.1 in.
High: 38°	Low: 24°	High: 43°	Low: 31°	High: 37°	Low: 19°	High: 39°	Low: 24°
							WCh: 16°
S 3 mph	SW 5 mph	WNW→NE 3-17 mph	ESE 5 mph	NNW 4-16→10-24 mph	NNW 9-24→5-19 mph	N→SE 2-17 mph	SSE→SSW 4→8 mph

Today	Partly to mostly sunny in the morning, becoming sunny in the afternoon. High 38°. Wind south around 3 mph.
Tonight	Mostly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 24°. Wind southwest around 5 mph.
Saturday	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. High 43°. Wind west-northwest around 3 mph, gusting to 17 mph, in the morning, becoming northeast in the afternoon.
Saturday night	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. A slight chance of a mix of rain, snow, sleet, and freezing rain after midnight. Low 31°. Wind east-southeast around 5 mph. Chance of precipitation 20 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Little or no snow or ice (on ground) accumulation expected.
Sunday	Cloudy. A slight chance of a mix of snow and rain in the morning, then a slight chance of snow in the afternoon. High 37°. Wind north-northwest around 4 mph, gusting to 16 mph, in the morning, becoming 10 mph, gusting to 24 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. No snow accumulation expected.
Sunday night	Mostly cloudy in the evening, becoming partly cloudy after midnight. Low 19°. Wind north-northwest around 9 mph, gusting to 24 mph, in the evening, becoming 5 mph, gusting to 19 mph, after midnight.
Monday	Sunny. High 39°. Wind north around 2 mph, gusting to 17 mph, in the morning, becoming southeast in the afternoon.
Monday night	Mostly clear in the evening, becoming partly cloudy after midnight. Low 24°. Wind chill ranging from 16 to 32. Wind south-southeast around 4 mph in the evening, becoming south-southwest around 8 mph after midnight.
Tuesday	Sunny in the morning, becoming partly cloudy in the afternoon. High 48°. Wind south-southwest around 8 mph, gusting to 19 mph.
Tuesday night	Partly to mostly cloudy in the evening, becoming partly cloudy after midnight. Breezy. Low 32°. Wind chill ranging from 23 to 34. Wind south-southwest around 12 mph, gusting to 18 mph.
Wednesday	Partly to mostly sunny in the morning, becoming mostly cloudy to cloudy in the afternoon. A slight chance of rain. High 49°. Wind west-southwest around 8 mph, gusting to 24 mph, in the morning, becoming west-northwest in the afternoon. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Wednesday night	Mostly cloudy to cloudy in the evening, becoming mostly cloudy after midnight. Light to moderate fog. Low 33°. Wind southwest around 6 mph, gusting to 18 mph, in the evening, becoming south after midnight.
Thursday	Mostly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Patchy light fog in the morning. Breezy and relatively mild. High 55°. Wind south-southwest around 13 mph, gusting to 24 mph, in the morning, becoming west in the afternoon.
Thursday night	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Breezy. Low 28°. Wind chill ranging from 18 to 39. Wind west-northwest around 13 mph, gusting to 26 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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