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, 11-Apr-2026 05:00 am

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

High: 80°	Low: 48°	High: 82°	Low: 49°	High: 82°	Low: 49°	High: 83°	Low: 49°

E→SSE 5-26 mph	SSE 7-22 mph	SSE 10-28 mph	SSW 8-23 mph	SSW 10-29→14-32 mph	SSW 11-27 mph	SSW 13-31 mph	SSW 11-27 mph
UV: 8 Very High		UV: 8 Very High		UV: 8 Very High		UV: 8 Very High

Today	Sunny. Warm. High 80°. UV index up to 8. Wind east around 5 mph, gusting to 26 mph, in the morning, becoming south-southeast in the afternoon.
Tonight	Clear. Low 48°. Wind south-southeast around 7 mph, gusting to 22 mph.
Sunday	Sunny. Unusually hot. High 82°. UV index up to 8. Wind south-southeast around 10 mph, gusting to 28 mph.
Sunday night	Mostly clear in the evening, becoming clear after midnight. Low 49°. Wind south-southwest around 8 mph, gusting to 23 mph.
Monday	Sunny. Breezy and unusually hot. High 82°. UV index up to 8. Wind south-southwest around 10 mph, gusting to 29 mph, in the morning, becoming 14 mph, gusting to 32 mph, in the afternoon.
Monday night	Clear. Low 49°. Wind south-southwest around 11 mph, gusting to 27 mph.
Tuesday	Sunny. Breezy and unusually hot. High 83°. UV index up to 8. Wind south-southwest around 13 mph, gusting to 31 mph.
Tuesday night	Clear. Low 49°. Wind south-southwest around 11 mph, gusting to 27 mph.
Wednesday	Sunny. Breezy and unusually hot. High 84°. UV index up to 8. Wind south-southwest around 13 mph, gusting to 31 mph.
Wednesday night	Clear. Low 49°. Wind south-southwest around 10 mph, gusting to 27 mph.
Thursday	Sunny. Breezy and unusually hot. High 84°. UV index up to 8. Wind south-southwest around 13 mph, gusting to 31 mph.
Thursday night	Clear. Low 49°. Wind south-southwest around 10 mph, gusting to 27 mph.
Friday	Sunny. Breezy and unusually hot. High 84°. UV index up to 8. Wind south-southwest around 13 mph, gusting to 31 mph.
Friday night	Clear. Low 51°. Wind south-southwest around 11 mph, gusting to 27 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

Powered by Davis Vantage Pro2 and CumulusMX v 4.6.4 (b4128) MXUI Template v 2.2.6 by Silver Acorn Valid HTML5