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: Wednesday, 26-Nov-2025 05:00 am

Today Mostly Sunny	Tonight Partly Cloudy	Thursday Mostly Sunny	Thursday night Partly Cloudy	Friday Partly Cloudy	Friday night Mix	Saturday Freezing Rain	Saturday night Rain and Snow
					<.1 in.	.75 in. <2 in.	<.25 in.
High: 45°	Low: 28°	High: 44°	Low: 23°	High: 43°	Low: 31°	High: 36°	Low: 28°
					WCh: 26°	WCh: 21°	WCh: 20°
W 14-33 mph	W 8-24 mph	W 7-25 mph	WNW 5-21 mph	WNW→SW 2-19 mph	ESE 7-20 mph	SE 11-22 mph	SW→W 13-27 mph

Today	Partly to mostly sunny. Breezy. High 45°. Wind west around 14 mph, gusting to 33 mph.
Tonight	Partly cloudy in the evening, becoming mostly cloudy after midnight. Low 28°. Wind west around 8 mph, gusting to 24 mph.
Thursday	Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. High 44°. Wind west around 7 mph, gusting to 25 mph.
Thursday night	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Low 23°. Wind west-northwest around 5 mph, gusting to 21 mph.
Friday	Partly cloudy. High 43°. Wind west-northwest around 2 mph, gusting to 19 mph, in the morning, becoming southwest in the afternoon.
Friday night	Dense overcast in the evening, becoming cloudy after midnight. A chance of a mix of snow, sleet, and rain after midnight. Low 31°. Wind chill ranging from 26 to 38. Wind east-southeast around 7 mph, gusting to 20 mph. Chance of precipitation 30 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Little or no snow or ice (on ground) accumulation expected.
Saturday	Dense overcast. A mix of snow, sleet, and freezing rain likely in the morning, then a mix of snow, rain, sleet, and freezing rain likely in the afternoon. High 36°. Wind chill ranging from 21 to 27. Wind southeast around 11 mph, gusting to 22 mph. Chance of precipitation 80 percent. Precipitation (liquid equivalent) mostly between half an inch and one inch. Snow or ice (on ground) accumulation 1 to 2 inches. Little if any freezing rain accumulation.
Saturday night	Dense overcast in the evening, becoming cloudy after midnight. Patchy light fog in the evening. A chance of a mix of snow and rain in the evening, then a chance of snow after midnight. Breezy. Low 28°. Wind chill ranging from 20 to 27. Wind southwest around 13 mph, gusting to 27 mph, in the evening, becoming west after midnight. Chance of precipitation 60 percent. Precipitation (liquid equivalent) mostly less than a quarter of an inch. Little or no snow accumulation expected.
Sunday	Cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Cold. High 31°. Wind chill around 20. Wind west-northwest around 12 mph, gusting to 27 mph, in the morning, becoming 8 mph, gusting to 26 mph, in the afternoon.
Sunday night	Mostly cloudy in the evening, becoming cloudy after midnight. Low 21°. Wind north around 4 mph, gusting to 22 mph.
Monday	Cloudy. A slight chance of snow in the afternoon. Cold. High 30°. Wind northeast around 4 mph, gusting to 16 mph. Chance of precipitation 20 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Little or no snow accumulation expected.
Monday night	Dense overcast in the evening, becoming mostly cloudy after midnight. Cold. Low 19°. Wind north-northeast around 4 mph, gusting to 16 mph.
Tuesday	Sunny. High 35°. Wind north-northwest around 3 mph, gusting to 17 mph, in the morning, becoming west-northwest in the afternoon.
Tuesday night	Clear. Cold. Low 21°. Wind chill ranging from 15 to 29. Wind south-southeast around 4 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

Powered by Davis Vantage Pro2 and CumulusMX v 4.5.2 (b4105) MXUI Template v 2.2.6 by Silver Acorn Valid HTML5