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, 04-Nov-2026 05:00 am

Today Mostly Cloudy	Tonight Fog late	Thursday Fog a.m.	Thursday night Mostly Cloudy	Friday Mostly Cloudy	Friday night Fog late	Saturday Fog a.m.	Saturday night Partly Cloudy

High: 68°	Low: 50°	High: 70°	Low: 50°	High: 59°	Low: 38°	High: 59°	Low: 38°

WSW 9-28 mph	WSW 5-24 mph	WSW 7-27 mph	NW 5-22 mph	NNW 8-26 mph	NNW 3-21 mph	NNW 2-23 mph	NNW→W 2 mph

Today	Mostly cloudy. Mild. High 68°. Wind west-southwest around 9 mph, gusting to 28 mph.
Tonight	Partly cloudy in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 50°. Wind west-southwest around 5 mph, gusting to 24 mph.
Thursday	Sunny in the morning, becoming mostly sunny in the afternoon. Patchy light fog in the morning. Mild. High 70°. Wind west-southwest around 7 mph, gusting to 27 mph.
Thursday night	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. Low 50°. Wind northwest around 5 mph, gusting to 22 mph.
Friday	Mostly cloudy in the morning, becoming mostly sunny in the afternoon. High 59°. Wind north-northwest around 8 mph, gusting to 26 mph.
Friday night	Clear in the evening, becoming mostly clear after midnight. Patchy light fog after midnight. Low 38°. Wind north-northwest around 3 mph, gusting to 21 mph.
Saturday	Partly cloudy. Patchy light fog in the morning. High 59°. Wind north-northwest around 2 mph, gusting to 23 mph.
Saturday night	Partly cloudy. Low 38°. Wind north-northwest around 2 mph in the evening, becoming west after midnight.
Sunday	Partly to mostly sunny. Patchy light fog in the morning. Mild. High 63°. Wind west around 4 mph, gusting to 22 mph.
Sunday night	Mostly clear in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 36°. Wind west around 2 mph.
Monday	Sunny. Patchy light fog in the morning. Mild. High 66°. Wind southwest around 3 mph, gusting to 19 mph.
Monday night	Clear. Low 37°. Wind southwest around 2 mph in the evening, becoming west after midnight.
Tuesday	Sunny. Mild. High 65°. Wind northwest around 5 mph, gusting to 23 mph.
Tuesday night	Fair. Low 37°. Wind north-northwest around 4 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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