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 07:00:37 CST

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

Updated: Tuesday, 25-Nov-2025 05:00 am

Today Mostly Cloudy	Tonight Partly Cloudy	Wednesday Mostly Sunny	Wednesday night Partly Cloudy	Thursday Sunny	Thursday night Clear	Friday Mostly Cloudy	Friday night Rain and Snow
<.1 in.							<.25 in. .25 in.
High: 59°	Low: 43°	High: 49°	Low: 31°	High: 44°	Low: 25°	High: 44°	Low: 33°

W 3-17→8-24 mph	WNW 12-29 mph	WNW 14-32 mph	WNW 8-27 mph	WNW 8-26 mph	WNW 5-20 mph	NW→SSE 2-16 mph	SSE 7-21 mph

Today	Mostly cloudy to cloudy. A slight chance of rain. Mild. High 59°. Wind west around 3 mph, gusting to 17 mph, in the morning, becoming 8 mph, gusting to 24 mph, in the afternoon. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Tonight	Partly cloudy. Breezy. Low 43°. Wind west-northwest around 12 mph, gusting to 29 mph.
Wednesday	Sunny in the morning, becoming mostly sunny in the afternoon. Breezy. High 49°. Wind west-northwest around 14 mph, gusting to 32 mph.
Wednesday night	Partly cloudy. Low 31°. Wind west-northwest around 8 mph, gusting to 27 mph.
Thursday	Sunny. High 44°. Wind west-northwest around 8 mph, gusting to 26 mph.
Thursday night	Clear. Low 25°. Wind west-northwest around 5 mph, gusting to 20 mph.
Friday	Sunny in the morning, becoming mostly cloudy in the afternoon. High 44°. Wind northwest around 2 mph, gusting to 16 mph, in the morning, becoming south-southeast in the afternoon.
Friday night	Cloudy. Patchy light fog after midnight. A chance of a mix of rain and snow after midnight. Low 33°. Wind south-southeast around 7 mph, gusting to 21 mph. Chance of precipitation 50 percent. Precipitation (liquid equivalent) mostly less than a quarter of an inch. Snow accumulation about a quarter inch.
Saturday	Dense overcast. Patchy light fog. A mix of snow, sleet, and rain likely in the morning, then a mix of rain and snow likely in the afternoon. High 36°. Wind chill around 27. Wind south-southeast around 9 mph, gusting to 20 mph. Chance of precipitation 70 percent. Precipitation (liquid equivalent) mostly between half an inch and one inch. Snow or ice (on ground) accumulation about an inch.
Saturday night	Dense overcast. Patchy light fog. A mix of rain and snow likely in the evening, then a chance of a mix of snow, sleet, and rain after midnight. Low 29°. Wind chill ranging from 20 to 28. Wind south-southeast around 8 mph, gusting to 19 mph, in the evening, becoming west-northwest around 13 mph, gusting to 27 mph, after midnight. Chance of precipitation 70 percent. Precipitation (liquid equivalent) mostly between a quarter and half an inch. No snow or ice (on ground) accumulation expected.
Sunday	Cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Breezy and cold. High 32°. Wind chill ranging from 18 to 24. Wind west-northwest around 14 mph, gusting to 28 mph, in the morning, becoming 11 mph, gusting to 28 mph, in the afternoon.
Sunday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 24°. Wind west-northwest around 4 mph, gusting to 23 mph.
Monday	Sunny in the morning, becoming partly to mostly cloudy in the afternoon. High 37°. Wind west around 2 mph, gusting to 23 mph.
Monday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 23°. Wind chill ranging from 15 to 31. Wind north-northeast around 3 mph, gusting to 18 mph, in the evening, becoming 6 mph, gusting to 20 mph, after midnight.

WXSIM forecast formatting script by Saratoga-Weather.org.

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