OFallon Missouri Weather

OFallon - Weather Data from OFallon, MO

Latitude: N 38° 50' 20" Longitude: W 90° 43' 42" Altitude: 532 ft

CDT UTC Last station update CDT

WXSIM Forecast for: O'Fallon
Issued by: OFallonweather.com

Updated: Saturday, 24-Oct-2026 05:00 am

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

High: 79°	Low: 51°	High: 79°	Low: 50°	High: 77°	Low: 48°	High: 75°	Low: 47°

SSE 4-23 mph	SSE 3 mph	SSE 3-21 mph	S 3 mph	SSW 3-21 mph	ESE→S 3 mph	S 4-23 mph	S 4-15 mph
UV: 4 Medium

Today	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Unusually warm. High 79°. UV index up to 4. Wind south-southeast around 4 mph, gusting to 23 mph.
Tonight	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Low 51°. Wind south-southeast around 3 mph.
Sunday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Unusually warm. High 79°. Wind south-southeast around 3 mph, gusting to 21 mph.
Sunday night	Partly to mostly cloudy. Low 50°. Wind south around 3 mph.
Monday	Partly to mostly cloudy in the morning, becoming partly cloudy in the afternoon. Unusually warm. High 77°. Wind south-southwest around 3 mph, gusting to 21 mph.
Monday night	Partly cloudy. Low 48°. Wind east-southeast around 3 mph in the evening, becoming south after midnight.
Tuesday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Warm. High 75°. Wind south around 4 mph, gusting to 23 mph.
Tuesday night	Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Low 47°. Wind south around 4 mph, gusting to 15 mph.
Wednesday	Partly to mostly sunny. Unusually warm. High 77°. Wind south around 5 mph, gusting to 23 mph.
Wednesday night	Clear. Patchy light fog after midnight. Low 49°. Wind south around 5 mph.
Thursday	Partly cloudy. Patchy light fog in the morning. Unusually warm. High 78°. Wind south around 5 mph, gusting to 19 mph.
Thursday night	Fair to partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 52°. Wind south-southwest around 4 mph.
Friday	Partly to mostly cloudy in the morning, becoming mostly cloudy in the afternoon. Unusually warm. High 77°. Wind south-southwest around 4 mph, gusting to 18 mph.
Friday night	Mostly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Mild. Low 56°. Wind south-southwest around 3 mph in the evening, becoming south-southeast after midnight.

WXSIM forecast formatting script by Saratoga-Weather.org.

Powered by Davis Vantage Pro2 and CumulusMX v 5.1.6 (b5016) MXUI Template v 2.2.6 by Silver Acorn Valid HTML5