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, 28-Dec-2025 05:00 am

Today Thunder storm	Tonight Partly Cloudy	Monday Partly Cloudy	Monday night Clear	Tuesday Partly Cloudy	Tuesday night Partly Cloudy	Wednesday Partly Cloudy	Wednesday night Partly Cloudy
<.1 in.
High: 74°	Low: 19°	High: 21°	Low: 11°	High: 38°	Low: 23°	High: 46°	Low: 21°
	WCh: 9°	WCh: 2°		WCh: 3°
SSW→W 10-27→16-36 mph	WNW 17-36 mph	WNW 16-34 mph	WNW 9-21 mph	WNW→WSW 6-24 mph	WSW 7-19 mph	W 6-24 mph	NW 3-18 mph

Today	Cloudy. A chance of rain. Scattered thundershowers possible. Breezy with near record warmth. High 74°. Wind south-southwest around 10 mph, gusting to 27 mph, in the morning, becoming west around 16 mph, gusting to 36 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Tonight	Mostly cloudy in the evening, becoming fair to partly cloudy after midnight. Windy. Low 19°. Wind chill ranging from 9 to 52. Wind west-northwest around 17 mph, gusting to 36 mph.
Monday	Partly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Windy and cold. High 21°. Wind chill ranging from 2 to 9. Wind west-northwest around 16 mph, gusting to 34 mph.
Monday night	Fair in the evening, becoming clear after midnight. Cold. Low 11°. Wind chill as low as 0. Wind west-northwest around 9 mph, gusting to 21 mph.
Tuesday	Sunny in the morning, becoming partly cloudy in the afternoon. High 38°. Wind chill ranging from 3 to 32. Wind west-northwest around 6 mph, gusting to 24 mph, in the morning, becoming west-southwest in the afternoon.
Tuesday night	Partly cloudy in the evening, becoming fair after midnight. Low 23°. Wind west-southwest around 7 mph, gusting to 19 mph.
Wednesday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Relatively mild. High 46°. Wind west around 6 mph, gusting to 24 mph.
Wednesday night	Fair to partly cloudy in the evening, becoming mostly clear after midnight. Low 21°. Wind northwest around 3 mph, gusting to 18 mph.
Thursday	Partly to mostly sunny. High 39°. Wind north-northwest around 5 mph, gusting to 24 mph.
Thursday night	Partly cloudy. Low 21°. Wind north around 2 mph, gusting to 19 mph.
Friday	Partly cloudy in the morning, becoming mostly sunny in the afternoon. High 44°. Wind east around 5 mph, gusting to 24 mph.
Friday night	Mostly clear in the evening, becoming clear after midnight. Low 19°. Wind northeast around 4 mph, gusting to 19 mph, in the evening, becoming north-northwest after midnight.
Saturday	Partly to mostly sunny. High 44°. Wind north-northwest around 2 mph, gusting to 21 mph, in the morning, becoming south-southeast in the afternoon.
Saturday night	Clear. Low 20°. Wind south-southeast around 4 mph, gusting to 17 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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