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-Nov-2026 05:00 am

Today Mostly Sunny	Tonight Clear	Monday Sunny	Monday night Clear	Tuesday Sunny	Tuesday night Mostly Cloudy	Wednesday Partly Cloudy	Wednesday night Mostly Cloudy
						<.1 in.
High: 64°	Low: 35°	High: 67°	Low: 38°	High: 70°	Low: 43°	High: 70°	Low: 44°

WSW 6-27 mph	W 3 mph	SW calm→4-21 mph	SW 4 mph	SW 3-19 mph	WSW 2 mph	WSW 6-20→11-27 mph	WNW→NNW 10-24 mph

Today	Mostly sunny in the morning, becoming sunny in the afternoon. Mild. High 64°. Wind west-southwest around 6 mph, gusting to 27 mph.
Tonight	Clear. Low 35°. Wind west around 3 mph.
Monday	Sunny. Mild. High 67°. Wind southwest near calm in the morning, becoming 4 mph, gusting to 21 mph, in the afternoon.
Monday night	Clear. Low 38°. Wind southwest around 4 mph.
Tuesday	Sunny. Mild. High 70°. Wind southwest around 3 mph, gusting to 19 mph.
Tuesday night	Clear in the evening, becoming partly to mostly cloudy after midnight. Low 43°. Wind west-southwest around 2 mph.
Wednesday	Mostly cloudy in the morning, becoming partly cloudy in the afternoon. A chance of rain. Mild. High 70°. Wind west-southwest around 6 mph, gusting to 20 mph, in the morning, becoming 11 mph, gusting to 27 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Wednesday night	Mostly cloudy to cloudy in the evening, becoming mostly cloudy after midnight. Low 44°. Wind west-northwest around 10 mph, gusting to 24 mph, in the evening, becoming north-northwest after midnight.
Thursday	Mostly cloudy to cloudy in the morning, becoming mostly cloudy in the afternoon. Breezy. High 50°. Wind north-northwest around 11 mph, gusting to 29 mph.
Thursday night	Mostly cloudy in the evening, becoming fair to partly cloudy after midnight. Low 34°. Wind north-northwest around 9 mph, gusting to 26 mph.
Friday	Mostly sunny in the morning, becoming mostly cloudy in the afternoon. High 45°. Wind north-northwest around 8 mph, gusting to 26 mph.
Friday night	Fair in the evening, becoming clear after midnight. Low 28°. Wind northwest around 5 mph, gusting to 21 mph.
Saturday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. High 51°. Wind northwest around 6 mph, gusting to 24 mph.
Saturday night	Fair to partly cloudy in the evening, becoming fair after midnight. Low 32°. Wind southwest around 4 mph, gusting to 15 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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