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: Sunday, 25-Oct-2026 05:00 am

Today Partly Cloudy	Tonight Mostly Cloudy	Monday Partly Cloudy	Monday night Partly Cloudy	Tuesday Partly Cloudy	Tuesday night Partly Cloudy	Wednesday Mostly Sunny	Wednesday night Clear
					<.1 in.
High: 79°	Low: 51°	High: 76°	Low: 47°	High: 73°	Low: 48°	High: 76°	Low: 47°

SSE 3-21 mph	ESE→SSW 3 mph	SSW 4-21 mph	S 3 mph	S 5-23 mph	S 4 mph	S 4-18→7-24 mph	S 5 mph
UV: 4 Medium

Today	Partly cloudy. Unusually warm. High 79°. UV index up to 4. Wind south-southeast around 3 mph, gusting to 21 mph.
Tonight	Partly to mostly cloudy. Low 51°. Wind east-southeast around 3 mph in the evening, becoming south-southwest after midnight.
Monday	Partly to mostly cloudy in the morning, becoming partly cloudy in the afternoon. Unusually warm. High 76°. Wind south-southwest around 4 mph, gusting to 21 mph.
Monday night	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Low 47°. Wind south around 3 mph.
Tuesday	Partly cloudy. Warm. High 73°. Wind south around 5 mph, gusting to 23 mph.
Tuesday night	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. A slight chance of rain. Low 48°. Wind south around 4 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Wednesday	Mostly sunny in the morning, becoming sunny in the afternoon. Unusually warm. High 76°. Wind south around 4 mph, gusting to 18 mph, in the morning, becoming 7 mph, gusting to 24 mph, in the afternoon.
Wednesday night	Clear. Low 47°. Wind south around 5 mph.
Thursday	Partly cloudy. Warm. High 76°. Wind south around 6 mph, gusting to 21 mph.
Thursday night	Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Mild. Low 55°. Wind south-southwest around 4 mph.
Friday	Mostly cloudy. Unusually warm. High 77°. Wind south-southwest around 4 mph, gusting to 19 mph.
Friday night	Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Relatively mild. Low 55°. Wind south around 4 mph.
Saturday	Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. Warm. High 73°. Wind south-southwest around 3 mph, gusting to 20 mph, in the morning, becoming southeast in the afternoon.
Saturday night	Dense overcast. Patchy light fog after midnight. Rain likely. Precipitation showery or intermittent. Mild. Low 62°. Wind southeast around 6 mph, gusting to 20 mph, in the evening, becoming 11 mph, gusting to 24 mph, after midnight. Chance of precipitation 80 percent. Precipitation mostly around an inch.

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