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 04:00 pm

Tonight Partly Cloudy	Thursday Cloudy	Thursday night Partly Cloudy	Friday Mostly Cloudy	Friday night Mostly Cloudy	Saturday Snow	Saturday night Mostly Cloudy	Sunday Sunny
					<.1 in. .25 in.
Low: 20°	High: 34°	Low: 27°	High: 37°	Low: 25°	High: 31°	Low: 10°	High: 25°
			WCh: 21°			WCh: 1°	WCh: -1°
NW 5 mph	W→SE 2 mph	ESE→ENE 5 mph	NNE 7-21 mph	NNE 4-17 mph	NNE 6-24 mph	N 9-26 mph	N 6-22 mph

Tonight	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 20°. Wind northwest around 5 mph.
Thursday	Cloudy. High 34°. Wind west around 2 mph in the morning, becoming southeast in the afternoon.
Thursday night	Mostly cloudy to cloudy in the evening, becoming partly cloudy after midnight. Low 27°. Wind east-southeast around 5 mph in the evening, becoming east-northeast after midnight.
Friday	Mostly cloudy in the morning, becoming cloudy in the afternoon. High 37°. Wind chill ranging from 21 to 30. Wind north-northeast around 7 mph, gusting to 21 mph.
Friday night	Mostly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 25°. Wind north-northeast around 4 mph, gusting to 17 mph.
Saturday	Cloudy in the morning, becoming dense overcast in the afternoon. A slight chance of snow in the morning, then a chance of snow in the afternoon. High 31°. Wind chill around 21. Wind north-northeast around 6 mph, gusting to 24 mph. Chance of precipitation 30 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Snow accumulation about a quarter inch.
Saturday night	Mostly cloudy in the evening, becoming clear after midnight. Cold. Low 10°. Wind chill ranging from 1 to 19. Wind north around 9 mph, gusting to 26 mph.
Sunday	Sunny. Cold. High 25°. Wind chill ranging from -1 to 20. Wind north around 6 mph, gusting to 22 mph.
Sunday night	Clear. Cold. Low 15°. Wind chill ranging from 6 to 18. Wind east-southeast around 3 mph in the evening, becoming south-southeast around 6 mph after midnight.
Monday	Sunny. High 44°. Wind south-southwest around 8 mph, gusting to 26 mph.
Monday night	Fair in the evening, becoming partly cloudy after midnight. Low 23°. Wind southwest around 3 mph, gusting to 15 mph.
Tuesday	Mostly cloudy in the morning, becoming cloudy in the afternoon. High 43°. Wind south-southeast around 5 mph.
Tuesday night	Dense overcast. A slight chance of rain in the evening, then a chance of rain after midnight. Low 37°. Wind south-southeast around 7 mph. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.

WXSIM forecast formatting script by Saratoga-Weather.org.

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