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 04:00 pm

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

Low: 46°	High: 66°	Low: 41°	High: 51°	Low: 34°	High: 47°	Low: 31°	High: 51°

SW 2-17 mph	W 8-25→13-29 mph	NW 10-25→7-17 mph	NNW 10-27 mph	NNW 7-24 mph	NNW 7-24 mph	NNW 3-18 mph	NNW→NE 2-18 mph

Tonight	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Low 46°. Wind southwest around 2 mph, gusting to 17 mph.
Wednesday	Partly cloudy. Mild. High 66°. Wind west around 8 mph, gusting to 25 mph, in the morning, becoming 13 mph, gusting to 29 mph, in the afternoon.
Wednesday night	Partly to mostly cloudy in the evening, becoming partly cloudy after midnight. Low 41°. Wind northwest around 10 mph, gusting to 25 mph, in the evening, becoming 7 mph, gusting to 17 mph, after midnight.
Thursday	Partly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. High 51°. Wind north-northwest around 10 mph, gusting to 27 mph.
Thursday night	Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Patchy light fog after midnight. Low 34°. Wind north-northwest around 7 mph, gusting to 24 mph.
Friday	Partly cloudy. Patchy light fog in the morning. High 47°. Wind north-northwest around 7 mph, gusting to 24 mph.
Friday night	Fair to partly cloudy. Low 31°. Wind north-northwest around 3 mph, gusting to 18 mph.
Saturday	Partly to mostly sunny. High 51°. Wind north-northwest around 2 mph, gusting to 18 mph, in the morning, becoming northeast in the afternoon.
Saturday night	Partly cloudy. Low 31°. Wind east around 2 mph.
Sunday	Partly cloudy. High 51°. Wind east around 4 mph, gusting to 23 mph.
Sunday night	Partly cloudy. Low 32°. Wind east around 3 mph, gusting to 15 mph.
Monday	Partly cloudy in the morning, becoming partly to mostly sunny in the afternoon. High 53°. Wind east around 5 mph, gusting to 23 mph.
Monday night	Fair to partly cloudy. Low 32°. Wind east around 2 mph, gusting to 15 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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