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: Tuesday, 10-Nov-2026 05:00 am

Today Sunny	Tonight Partly Cloudy	Wednesday Partly Cloudy	Wednesday night Partly Cloudy	Thursday Partly Cloudy	Thursday night Fog late	Friday Fog a.m.	Friday night Clear

High: 70°	Low: 42°	High: 68°	Low: 41°	High: 52°	Low: 35°	High: 48°	Low: 30°

W 3-19 mph	SW 2 mph	SW→WNW 7-26→13-29 mph	NW 9-26 mph	NW 9-27 mph	NW 6-24 mph	NNW 7-25 mph	NNW 2-19 mph

Today	Sunny. Unusually warm. High 70°. Wind west around 3 mph, gusting to 19 mph.
Tonight	Clear in the evening, becoming partly cloudy after midnight. Low 42°. Wind southwest around 2 mph.
Wednesday	Partly cloudy. Mild. High 68°. Wind southwest around 7 mph, gusting to 26 mph, in the morning, becoming west-northwest around 13 mph, gusting to 29 mph, in the afternoon.
Wednesday night	Partly cloudy in the evening, becoming mostly clear after midnight. Low 41°. Wind northwest around 9 mph, gusting to 26 mph.
Thursday	Partly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. High 52°. Wind northwest around 9 mph, gusting to 27 mph.
Thursday night	Partly cloudy. Patchy light fog after midnight. Low 35°. Wind northwest around 6 mph, gusting to 24 mph.
Friday	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Patchy light fog in the morning. High 48°. Wind north-northwest around 7 mph, gusting to 25 mph.
Friday night	Clear. Low 30°. Wind north-northwest around 2 mph, gusting to 19 mph.
Saturday	Sunny. High 53°. Wind northwest around 2 mph, gusting to 21 mph, in the morning, becoming southeast in the afternoon.
Saturday night	Clear in the evening, becoming mostly clear after midnight. Low 32°. Wind east-southeast around 3 mph, gusting to 16 mph.
Sunday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. Patchy light fog in the morning. High 56°. Wind east-southeast around 5 mph, gusting to 24 mph.
Sunday night	Partly cloudy. Low 34°. Wind east around 4 mph, gusting to 17 mph.
Monday	Partly cloudy in the morning, becoming sunny in the afternoon. High 55°. Wind east around 5 mph, gusting to 23 mph.
Monday night	Clear in the evening, becoming fair to partly cloudy after midnight. Low 34°. Wind east around 2 mph, gusting to 15 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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