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, 08-Feb-2026 04:00 pm

Tonight Mostly Clear	Monday Mostly Sunny	Monday night Clear	Tuesday Mostly Sunny	Tuesday night Partly Cloudy	Wednesday Mostly Sunny	Wednesday night Partly Cloudy	Thursday Mostly Cloudy

Low: 26°	High: 63°	Low: 35°	High: 65°	Low: 34°	High: 57°	Low: 28°	High: 49°

ESE 4-20 mph	SE→S 2-18 mph	SSW 6 mph	NW 6-26 mph	NNW 5-20 mph	N 3-22 mph	NNE→E 2-18 mph	ESE 5-21 mph

Tonight	Mostly clear in the evening, becoming clear after midnight. Low 26°. Wind east-southeast around 4 mph, gusting to 20 mph.
Monday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. Unusually mild. High 63°. Wind southeast around 2 mph, gusting to 18 mph, in the morning, becoming south in the afternoon.
Monday night	Clear. Low 35°. Wind south-southwest around 6 mph.
Tuesday	Sunny in the morning, becoming mostly sunny in the afternoon. Unusually mild. High 65°. Wind northwest around 6 mph, gusting to 26 mph.
Tuesday night	Fair to partly cloudy. Low 34°. Wind north-northwest around 5 mph, gusting to 20 mph.
Wednesday	Sunny in the morning, becoming mostly sunny in the afternoon. Relatively mild. High 57°. Wind north around 3 mph, gusting to 22 mph.
Wednesday night	Fair to partly cloudy. Low 28°. Wind north-northeast around 2 mph, gusting to 18 mph, in the evening, becoming east after midnight.
Thursday	Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. High 49°. Wind east-southeast around 5 mph, gusting to 21 mph.
Thursday night	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. A chance of rain in the evening, then a slight chance of rain after midnight. Low 38°. Wind southeast around 7 mph, gusting to 20 mph. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch.
Friday	Cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Patchy light fog in the morning. A slight chance of rain. Relatively mild. High 50°. Wind east-southeast around 6 mph, gusting to 24 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Friday night	Cloudy. Patchy light fog after midnight. Low 34°. Wind east-northeast around 5 mph, gusting to 22 mph.
Saturday	Cloudy in the morning, becoming mostly cloudy in the afternoon. Patchy light fog in the morning. High 45°. Wind northeast around 5 mph, gusting to 21 mph.
Saturday night	Mostly clear in the evening, becoming clear after midnight. Low 27°. Wind north-northeast around 3 mph, gusting to 19 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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