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: Thursday, 05-Nov-2026 05:00 am

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

High: 64°	Low: 45°	High: 58°	Low: 35°	High: 57°	Low: 35°	High: 65°	Low: 37°

W 7-31→10-28 mph	NW 7-23 mph	NNW 7-25 mph	NNW 3-19 mph	NNW 2-21 mph	WSW calm	WSW 4-21 mph	WSW 3 mph

Today	Partly to mostly sunny in the morning, becoming partly to mostly cloudy in the afternoon. Mild. High 64°. Wind west around 7 mph, gusting to 31 mph, in the morning, becoming 10 mph, gusting to 28 mph, in the afternoon.
Tonight	Mostly cloudy to cloudy. Low 45°. Wind northwest around 7 mph, gusting to 23 mph.
Friday	Partly to mostly cloudy in the morning, becoming sunny in the afternoon. High 58°. Wind north-northwest around 7 mph, gusting to 25 mph.
Friday night	Clear. Patchy light fog after midnight. Low 35°. Wind north-northwest around 3 mph, gusting to 19 mph.
Saturday	Partly cloudy. Patchy light fog in the morning. High 57°. Wind north-northwest around 2 mph, gusting to 21 mph.
Saturday night	Partly cloudy in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 35°. Wind west-southwest near calm.
Sunday	Sunny. Patchy light fog in the morning. Mild. High 65°. Wind west-southwest around 4 mph, gusting to 21 mph.
Sunday night	Clear. Patchy light fog after midnight. Low 37°. Wind west-southwest around 3 mph.
Monday	Sunny. Patchy light fog in the morning. Mild. High 70°. Wind southwest around 4 mph, gusting to 22 mph.
Monday night	Clear. Patchy light fog after midnight. Low 41°. Wind southwest around 5 mph.
Tuesday	Sunny. Patchy light fog in the morning. Mild. High 70°. Wind west-southwest around 4 mph, gusting to 21 mph.
Tuesday night	Clear in the evening, becoming mostly clear after midnight. Low 40°. Wind north-northwest around 3 mph.
Wednesday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. Mild. High 65°. Wind north-northwest around 4 mph, gusting to 22 mph, in the morning, becoming 9 mph, gusting to 26 mph, in the afternoon.
Wednesday night	Partly cloudy. Low 42°. Wind north-northwest around 6 mph, gusting to 22 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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