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: Tuesday, 02-Dec-2025 05:00 am

Today Partly Cloudy	Tonight Partly Cloudy	Wednesday Partly Cloudy	Wednesday night Mix	Thursday Mostly Sunny	Thursday night Partly Cloudy	Friday Mostly Cloudy	Friday night Mostly Cloudy
			<.1 in. .25 in.
High: 35°	Low: 20°	High: 42°	Low: 20°	High: 34°	Low: 18°	High: 41°	Low: 24°

NW→WSW 4-21 mph	SSE 4 mph	SSW→WNW 4-22 mph	NNW 7-24 mph	NNE 4-21 mph	ENE→SE 2 mph	S 3-17 mph	WSW 3 mph

Today	Partly to mostly cloudy in the morning, becoming partly cloudy in the afternoon. High 35°. Wind northwest around 4 mph, gusting to 21 mph, in the morning, becoming west-southwest in the afternoon.
Tonight	Fair to partly cloudy in the evening, becoming mostly clear after midnight. Low 20°. Wind south-southeast around 4 mph.
Wednesday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. High 42°. Wind south-southwest around 4 mph, gusting to 22 mph, in the morning, becoming west-northwest in the afternoon.
Wednesday night	Cloudy. A slight chance of a mix of snow and sleet in the evening, then a slight chance of snow after midnight. Low 20°. Wind north-northwest around 7 mph, gusting to 24 mph. Chance of precipitation 20 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Snow or ice (on ground) accumulation about a quarter inch.
Thursday	Mostly sunny in the morning, becoming sunny in the afternoon. High 34°. Wind north-northeast around 4 mph, gusting to 21 mph.
Thursday night	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Low 18°. Wind east-northeast around 2 mph in the evening, becoming southeast after midnight.
Friday	Partly to mostly cloudy in the morning, becoming sunny in the afternoon. High 41°. Wind south around 3 mph, gusting to 17 mph.
Friday night	Mostly clear in the evening, becoming partly to mostly cloudy after midnight. Low 24°. Wind west-southwest around 3 mph.
Saturday	Mostly cloudy in the morning, becoming partly cloudy in the afternoon. High 44°. Wind west-southwest around 2 mph, gusting to 17 mph, in the morning, becoming north-northeast in the afternoon.
Saturday night	Partly to mostly cloudy in the evening, becoming cloudy after midnight. A slight chance of a mix of freezing rain and sleet in the evening, then a chance of a mix of sleet, freezing rain, and snow after midnight. Low 29°. Wind east-northeast around 4 mph. Chance of precipitation 40 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Little or no snow or ice (on ground) accumulation expected. Little if any freezing rain accumulation.
Sunday	Dense overcast. A chance of a mix of freezing rain, sleet, snow, and rain in the morning, then a chance of snow in the afternoon. High 34°. Wind chill ranging from 23 to 28. Wind east-northeast around 6 mph, gusting to 18 mph, in the morning, becoming north-northeast in the afternoon. Chance of precipitation 50 percent. Precipitation (liquid equivalent) mostly around a tenth of an inch. Snow or ice (on ground) accumulation about a quarter inch. Little if any freezing rain accumulation.
Sunday night	Cloudy. A chance of snow. Low 25°. Wind north-northeast around 5 mph, gusting to 18 mph. Chance of precipitation 30 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. Snow accumulation about a quarter inch.
Monday	Mostly cloudy to cloudy. High 36°. Wind north-northeast around 3 mph, gusting to 15 mph.
Monday night	Cloudy. Low 27°. Wind north-northeast near calm in the evening, becoming east-southeast after midnight.

WXSIM forecast formatting script by Saratoga-Weather.org.

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