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, 10-Dec-2025 05:00 am

Today Partly Cloudy	Tonight Mostly Cloudy	Thursday Mostly Cloudy	Thursday night Mostly Cloudy	Friday Partly Cloudy	Friday night Mostly Cloudy	Saturday Mostly Cloudy	Saturday night Snow
							<.1 in. .5 in.
High: 44°	Low: 27°	High: 38°	Low: 28°	High: 40°	Low: 21°	High: 27°	Low: 11°
						WCh: 15°	WCh: 2°
WNW 15-33 mph	WNW 7-24→4-18 mph	SW→SSE calm→4-20 4	E 6-19 mph	N 8-24 mph	NW 5-19 mph	N 5-22 mph	N 8-24 mph

Today	Mostly cloudy in the morning, becoming partly cloudy in the afternoon. Breezy. High 44°, but temperatures falling in the afternoon. Wind west-northwest around 15 mph, gusting to 33 mph.
Tonight	Partly to mostly cloudy. Low 27°. Wind west-northwest around 7 mph, gusting to 24 mph, in the evening, becoming 4 mph, gusting to 18 mph, after midnight.
Thursday	Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. High 38°. Wind southwest near calm in the morning, becoming south-southeast around 4 mph, gusting to 20 mph, in the afternoon.
Thursday night	Cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 28°. Wind east around 6 mph, gusting to 19 mph.
Friday	Partly cloudy in the morning, becoming mostly cloudy in the afternoon. High 40°. Wind north around 8 mph, gusting to 24 mph.
Friday night	Mostly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 21°. Wind northwest around 5 mph, gusting to 19 mph.
Saturday	Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. High 27°. Wind chill ranging from 15 to 20. Wind north around 5 mph, gusting to 22 mph.
Saturday night	Mostly cloudy in the evening, becoming fair to partly cloudy after midnight. A chance of snow. Cold. Low 11°. Wind chill ranging from 2 to 17. Wind north around 8 mph, gusting to 24 mph. Chance of precipitation 30 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Snow accumulation about half an inch.
Sunday	Sunny. High 26°. Wind chill ranging from 1 to 20. Wind north around 5 mph, gusting to 23 mph.
Sunday night	Clear. Cold. Low 14°. Wind chill ranging from 6 to 18. Wind east-northeast around 4 mph in the evening, becoming southeast after midnight.
Monday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. High 44°. Wind southeast around 7 mph, gusting to 23 mph, in the morning, becoming south in the afternoon.
Monday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 26°. Wind south around 5 mph, gusting to 17 mph.
Tuesday	Cloudy in the morning, becoming dense overcast in the afternoon. High 41°. Wind south around 6 mph.
Tuesday night	Cloudy in the evening, becoming dense overcast after midnight. A chance of rain. Low 34°. Wind south around 6 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.

WXSIM forecast formatting script by Saratoga-Weather.org.

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