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: Saturday, 14-Nov-2026 05:00 am

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

High: 47°	Low: 21°	High: 50°	Low: 24°	High: 54°	Low: 28°	High: 57°	Low: 31°

WNW→N 2-20 mph	NE calm	E 1-19 mph	E calm	SSE 1-19 mph	SE 3 mph	SE 4-21 mph	SSE 5 mph

Today	Partly to mostly sunny in the morning, becoming sunny in the afternoon. High 47°. Wind west-northwest around 2 mph, gusting to 20 mph, in the morning, becoming north in the afternoon.
Tonight	Clear. Cold. Low 21°. Wind northeast near calm.
Sunday	Partly cloudy in the morning, becoming mostly sunny in the afternoon. High 50°. Wind east around 1 mph, gusting to 19 mph.
Sunday night	Clear. Low 24°. Wind east near calm.
Monday	Sunny. High 54°. Wind south-southeast around 1 mph, gusting to 19 mph.
Monday night	Clear. Low 28°. Wind southeast around 3 mph.
Tuesday	Partly cloudy in the morning, becoming mostly sunny in the afternoon. High 57°. Wind southeast around 4 mph, gusting to 21 mph.
Tuesday night	Clear. Low 31°. Wind south-southeast around 5 mph.
Wednesday	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Mild. High 62°. Wind south around 7 mph, gusting to 23 mph.
Wednesday night	Partly cloudy. Low 40°. Wind south around 7 mph, gusting to 16 mph.
Thursday	Partly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Unusually warm. High 69°. Wind south-southwest around 7 mph, gusting to 23 mph.
Thursday night	Mostly cloudy to cloudy. Low 44°. Wind west-southwest around 2 mph in the evening, becoming east-southeast after midnight.
Friday	Mostly sunny in the morning, becoming partly cloudy in the afternoon. Mild. High 67°. Wind south-southeast around 4 mph, gusting to 16 mph, in the morning, becoming 8 mph, gusting to 20 mph, in the afternoon.
Friday night	Fair in the evening, becoming partly to mostly cloudy after midnight. Low 46°. Wind south around 7 mph.

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