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: Tuesday, 25-Nov-2025 04:00 pm

Tonight Fog	Wednesday Fog a.m.	Wednesday night Partly Cloudy	Thursday Sunny	Thursday night Clear	Friday Mostly Cloudy	Friday night Mix	Saturday Rain and Snow
						<.1 in.	.75 in. 1 in.
Low: 35°	High: 43°	Low: 27°	High: 42°	Low: 23°	High: 43°	Low: 32°	High: 35°
		WCh: 21°				WCh: 26°
WSW 12-26 mph	WSW 15-32 mph	W 8-23 mph	WNW 8-26 mph	WNW 5-19 mph	WNW→SSE 2-17 mph	SE 5-17→8-17 mph	SE 10-22 mph

Tonight	Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Patchy light fog. Breezy. Low 35°. Wind west-southwest around 12 mph, gusting to 26 mph.
Wednesday	Sunny. Patchy light fog in the morning. Breezy. High 43°. Wind west-southwest around 15 mph, gusting to 32 mph.
Wednesday night	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Low 27°. Wind chill ranging from 21 to 33. Wind west around 8 mph, gusting to 23 mph.
Thursday	Sunny. High 42°. Wind west-northwest around 8 mph, gusting to 26 mph.
Thursday night	Clear. Low 23°. Wind west-northwest around 5 mph, gusting to 19 mph.
Friday	Sunny in the morning, becoming partly to mostly cloudy in the afternoon. High 43°. Wind west-northwest around 2 mph, gusting to 17 mph, in the morning, becoming south-southeast in the afternoon.
Friday night	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. A slight chance of a mix of snow, rain, and sleet after midnight. Low 32°. Wind chill ranging from 26 to 38. Wind southeast around 5 mph, gusting to 17 mph, in the evening, becoming 8 mph, gusting to 17 mph, after midnight. Chance of precipitation 20 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. No snow or ice (on ground) accumulation expected.
Saturday	Dense overcast. A mix of snow, rain, and sleet likely in the morning, then a mix of rain and snow likely in the afternoon. High 35°. Wind chill around 26. Wind southeast around 10 mph, gusting to 22 mph. Chance of precipitation 70 percent. Precipitation (liquid equivalent) mostly between half an inch and one inch. Snow or ice (on ground) accumulation about an inch.
Saturday night	Dense overcast in the evening, becoming cloudy after midnight. Rain likely in the evening, then a slight chance of a mix of rain, snow, and sleet after midnight. Breezy. Low 31°. Wind chill ranging from 24 to 28. Wind south around 12 mph, gusting to 25 mph, in the evening, becoming west after midnight. Chance of precipitation 70 percent. Precipitation (liquid equivalent) mostly around a quarter of an inch. No snow or ice (on ground) accumulation expected.
Sunday	Cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Breezy. High 35°. Wind chill ranging from 22 to 26. Wind west-northwest around 12 mph, gusting to 27 mph.
Sunday night	Partly cloudy. Low 22°. Wind north-northwest around 6 mph, gusting to 26 mph.
Monday	Mostly cloudy in the morning, becoming cloudy in the afternoon. High 31°. Wind north-northwest around 3 mph, gusting to 19 mph.
Monday night	Cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Cold. Low 21°. Wind north-northeast around 4 mph, gusting to 17 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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