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 04:00 pm

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

Low: 49°	High: 77°	Low: 50°	High: 75°	Low: 48°	High: 74°	Low: 50°	High: 78°

SSE 3-18 mph	SSE 2-19 mph	S 3 mph	SSW 3-20 mph	SE→S 3 mph	S 5-23 mph	S 5-16 mph	SSW 5-23 mph

Tonight	Partly cloudy. Low 49°. Wind south-southeast around 3 mph, gusting to 18 mph.
Sunday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Unusually warm. High 77°. Wind south-southeast around 2 mph, gusting to 19 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. Warm. High 75°. Wind south-southwest around 3 mph, gusting to 20 mph.
Monday night	Fair in the evening, becoming partly cloudy after midnight. Low 48°. Wind 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 74°. Wind south around 5 mph, gusting to 23 mph.
Tuesday night	Fair to partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 50°. Wind south around 5 mph, gusting to 16 mph.
Wednesday	Partly cloudy in the morning, becoming sunny in the afternoon. Unusually warm. High 78°. Wind south-southwest around 5 mph, gusting to 23 mph.
Wednesday night	Clear. Patchy light fog after midnight. Low 49°. Wind south-southwest around 5 mph.
Thursday	Sunny in the morning, becoming mostly sunny in the afternoon. Patchy light fog in the morning. Unusually warm. High 79°. Wind south-southwest around 4 mph, gusting to 19 mph.
Thursday night	Partly to mostly cloudy in the evening, becoming partly cloudy after midnight. Low 52°. Wind southeast around 4 mph in the evening, becoming south after midnight.
Friday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Unusually warm. High 77°. Wind south around 6 mph, gusting to 22 mph.
Friday night	Mostly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 54°. Wind south around 5 mph.

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