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: Sunday, 07-Dec-2025 05:00 am

Today Partly Cloudy	Tonight Partly Cloudy	Monday Partly Cloudy	Monday night Partly Cloudy	Tuesday Mostly Sunny	Tuesday night Mostly Cloudy	Wednesday Mostly Cloudy	Wednesday night Partly Cloudy

High: 46°	Low: 22°	High: 41°	Low: 26°	High: 52°	Low: 36°	High: 46°	Low: 28°
			WCh: 17°
WNW→N 3-23→9-28 mph	N 9-25→5-22 mph	N→SSW 2-15 mph	S 4→8 mph	SW 8-21 mph	SW 14-19 mph	W 13-31 mph	NW 5-25→calm mph

Today	Partly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. High 46°. Wind west-northwest around 3 mph, gusting to 23 mph, in the morning, becoming north around 9 mph, gusting to 28 mph, in the afternoon.
Tonight	Mostly cloudy to cloudy in the evening, becoming partly cloudy after midnight. Low 22°. Wind north around 9 mph, gusting to 25 mph, in the evening, becoming 5 mph, gusting to 22 mph, after midnight.
Monday	Mostly sunny in the morning, becoming partly cloudy in the afternoon. High 41°. Wind north around 2 mph, gusting to 15 mph, in the morning, becoming south-southwest in the afternoon.
Monday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 26°. Wind chill ranging from 17 to 35. Wind south around 4 mph in the evening, becoming 8 mph after midnight.
Tuesday	Partly to mostly sunny. Relatively mild. High 52°. Wind southwest around 8 mph, gusting to 21 mph.
Tuesday night	Mostly cloudy in the evening, becoming partly to mostly cloudy after midnight. Breezy. Low 36°. Wind southwest around 14 mph, gusting to 19 mph.
Wednesday	Partly to mostly cloudy. Breezy. High 46°. Wind west around 13 mph, gusting to 31 mph.
Wednesday night	Partly cloudy in the evening, becoming mostly cloudy after midnight. Low 28°. Wind northwest around 5 mph, gusting to 25 mph, in the evening, becoming near calm after midnight.
Thursday	Cloudy. A chance of snow. High 35°. Wind east around 3 mph, gusting to 22 mph. Chance of precipitation 50 percent. Precipitation (liquid equivalent) mostly around a tenth of an inch. Snow accumulation about a quarter inch.
Thursday night	Mostly cloudy to cloudy in the evening, becoming mostly cloudy after midnight. Low 23°. Wind northeast around 3 mph, gusting to 19 mph, in the evening, becoming north-northwest after midnight.
Friday	Partly to mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. A slight chance of snow in the morning, then a chance of snow in the afternoon. High 30°. Wind chill around 20. Wind west-northwest around 5 mph, gusting to 19 mph, in the morning, becoming 9 mph, gusting to 25 mph, in the afternoon. Chance of precipitation 40 percent. Precipitation (liquid equivalent) mostly around a tenth of an inch. Snow accumulation about half an inch.
Friday night	Mostly cloudy to cloudy in the evening, becoming partly cloudy after midnight. Breezy and cold. Low 15°. Wind chill ranging from 3 to 17. Wind west-northwest around 12 mph, gusting to 31 mph.
Saturday	Partly cloudy. Cold. High 24°. Wind chill ranging from 3 to 17. Wind west-northwest around 9 mph, gusting to 26 mph.
Saturday night	Mostly clear in the evening, becoming mostly cloudy to cloudy after midnight. Low 18°. Wind southwest around 3 mph, gusting to 17 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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