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-Feb-2026 04:00 pm

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

Low: 29°	High: 54°	Low: 30°	High: 52°	Low: 34°	High: 60°	Low: 34°	High: 60°

N 7-17 mph	N 4-22 mph	N→SE 1-16 mph	SSE 5-23 mph	SSE 5-21 mph	SSE 5-23 mph	SSE 3-18 mph	E 2-20 mph

Tonight	Fair to partly cloudy in the evening, becoming mostly clear after midnight. Low 29°. Wind north around 7 mph, gusting to 17 mph.
Wednesday	Sunny. Patchy light fog in the morning. Relatively mild. High 54°. Wind north around 4 mph, gusting to 22 mph.
Wednesday night	Clear in the evening, becoming partly to mostly cloudy after midnight. Low 30°. Wind north around 1 mph, gusting to 16 mph, in the evening, becoming southeast after midnight.
Thursday	Mostly cloudy to cloudy in the morning, becoming mostly cloudy in the afternoon. Relatively mild. High 52°. Wind south-southeast around 5 mph, gusting to 23 mph.
Thursday night	Mostly cloudy. Low 34°. Wind south-southeast around 5 mph, gusting to 21 mph.
Friday	Partly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Mild. High 60°. Wind south-southeast around 5 mph, gusting to 23 mph.
Friday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 34°. Wind south-southeast around 3 mph, gusting to 18 mph.
Saturday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Mild. High 60°. Wind east around 2 mph, gusting to 20 mph.
Saturday night	Partly cloudy. Low 34°. Wind east around 3 mph, gusting to 15 mph, in the evening, becoming west after midnight.
Sunday	Partly cloudy in the morning, becoming sunny in the afternoon. Unusually mild. High 62°. Wind northwest around 5 mph, gusting to 23 mph.
Sunday night	Clear in the evening, becoming mostly clear after midnight. Low 31°. Wind southwest around 4 mph.
Monday	Mostly sunny in the morning, becoming sunny in the afternoon. Unusually mild. High 67°. Wind south-southeast around 5 mph, gusting to 24 mph.
Monday night	Partly cloudy. Low 40°. Wind south-southeast around 5 mph, gusting to 17 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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