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: Friday, 13-Nov-2026 05:00 am

Today Partly Cloudy	Tonight Mostly Clear	Saturday Sunny	Saturday night Clear	Sunday Sunny	Sunday night Clear	Monday Sunny	Monday night Clear

High: 46°	Low: 26°	High: 50°	Low: 26°	High: 52°	Low: 28°	High: 55°	Low: 29°

NW 7-34 mph	NW 4-19 mph	NNW→NNE 2-19 mph	ENE calm	ENE 1-20 mph	ESE calm	SE 1-20 mph	SE 3 mph

Today	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. High 46°. Wind northwest around 7 mph, gusting to 34 mph.
Tonight	Mostly clear in the evening, becoming clear after midnight. Low 26°. Wind northwest around 4 mph, gusting to 19 mph.
Saturday	Sunny. High 50°. Wind north-northwest around 2 mph, gusting to 19 mph, in the morning, becoming north-northeast in the afternoon.
Saturday night	Clear. Low 26°. Wind east-northeast near calm.
Sunday	Sunny. High 52°. Wind east-northeast around 1 mph, gusting to 20 mph.
Sunday night	Clear. Low 28°. Wind east-southeast near calm.
Monday	Sunny. High 55°. Wind southeast around 1 mph, gusting to 20 mph.
Monday night	Clear. Low 29°. Wind southeast around 3 mph.
Tuesday	Sunny. Relatively mild. High 58°. Wind south-southeast around 3 mph, gusting to 22 mph.
Tuesday night	Clear. Low 32°. Wind south-southeast around 4 mph.
Wednesday	Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. Mild. High 63°. Wind south-southeast around 6 mph, gusting to 23 mph.
Wednesday night	Partly to mostly cloudy in the evening, becoming cloudy after midnight. Low 45°. Wind south-southeast around 6 mph.
Thursday	Dense overcast in the morning, becoming mostly cloudy to cloudy in the afternoon. A slight chance of rain in the morning, then a chance of rain in the afternoon. High 58°. Wind south around 7 mph, gusting to 16 mph, in the morning, becoming southwest in the afternoon. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Thursday night	Cloudy. Relatively mild. Low 50°. Wind southwest around 2 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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