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: Wednesday, 28-Oct-2026 04:00 pm

Tonight Fair	Thursday Partly Cloudy	Thursday night Fog late	Friday Chance rain	Friday night Mostly Cloudy	Saturday Cloudy	Saturday night Chance rain	Sunday Mostly Cloudy
			<.1 in.			<.25 in.
Low: 47°	High: 79°	Low: 51°	High: 66°	Low: 53°	High: 68°	Low: 56°	High: 71°

S 6-21 mph	SW 5-23 mph	NE 4 mph	ESE 5 mph	SE→SSW 4 mph	SSW→ENE 2 mph	ESE 3 mph	ESE 2-17 mph

Tonight	Fair. Low 47°. Wind south around 6 mph, gusting to 21 mph.
Thursday	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Unusually warm. High 79°. Wind southwest around 5 mph, gusting to 23 mph.
Thursday night	Mostly cloudy in the evening, becoming partly cloudy after midnight. Patchy light fog after midnight. Low 51°. Wind northeast around 4 mph.
Friday	Mostly cloudy to cloudy. Patchy light fog in the morning. A chance of rain. Mild. High 66°. Wind east-southeast around 5 mph. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Friday night	Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Low 53°. Wind southeast around 4 mph in the evening, becoming south-southwest after midnight.
Saturday	Cloudy. Mild. High 68°. Wind south-southwest around 2 mph in the morning, becoming east-northeast in the afternoon.
Saturday night	Mostly cloudy to cloudy. Patchy light fog after midnight. A chance of rain. Mild. Low 56°. Wind east-southeast around 3 mph. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch.
Sunday	Mostly cloudy. Mild. High 71°. Wind east-southeast around 2 mph, gusting to 17 mph.
Sunday night	Mostly cloudy to cloudy. Mild. Low 58°. Wind east-southeast around 4 mph in the evening, becoming south-southeast after midnight.
Monday	Cloudy in the morning, becoming dense overcast in the afternoon. Patchy light fog in the morning. A slight chance of rain in the morning, then a chance of rain in the afternoon. Mild. High 68°. Wind south-southeast around 8 mph, gusting to 23 mph. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch.
Monday night	Dense overcast. Rain likely. Breezy and mild. Low 60°. Wind south-southeast around 12 mph, gusting to 21 mph. Chance of precipitation 60 percent. Precipitation mostly around a quarter of an inch.
Tuesday	Dense overcast. Patchy light fog in the morning. A chance of rain in the morning, then rain likely in the afternoon. Breezy. High 63°. Wind southeast around 12 mph, gusting to 23 mph. Chance of precipitation 80 percent. Precipitation mostly around half an inch.
Tuesday night	Dense overcast. Patchy light fog after midnight. Rain likely. Mild. Low 60°. Wind southeast around 11 mph, gusting to 23 mph. Chance of precipitation 70 percent. Precipitation mostly around a quarter of an inch.

WXSIM forecast formatting script by Saratoga-Weather.org.

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