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: Monday, 27-Oct-2025 04:00 pm

Tonight Cloudy	Tuesday Cloudy	Tuesday night Rain likely	Wednesday Chance rain	Wednesday night Fog	Thursday Fog a.m.	Thursday night Fog late	Friday Fog a.m.
	<.1 in.	.5 in.	<.25 in.
Low: 50°	High: 56°	Low: 49°	High: 53°	Low: 39°	High: 56°	Low: 37°	High: 59°

ENE 2 mph	ESE 3-18 mph	E 6-18→10-22 mph	NE 12-27 mph	N 7-22 mph	NNW 7-25 mph	WNW 5-17 mph	W 6-24→10-27 mph

Tonight	Cloudy. Low 50°. Wind east-northeast around 2 mph.
Tuesday	Cloudy in the morning, becoming dense overcast in the afternoon. A chance of rain. High 56°. Wind east-southeast around 3 mph, gusting to 18 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Tuesday night	Dense overcast. Patchy light fog. A chance of rain in the evening, then rain likely after midnight. Low 49°. Wind east around 6 mph, gusting to 18 mph, in the evening, becoming 10 mph, gusting to 22 mph, after midnight. Chance of precipitation 80 percent. Precipitation mostly around half an inch.
Wednesday	Dense overcast in the morning, becoming mostly cloudy to cloudy in the afternoon. A chance of rain in the morning, then a slight chance of rain in the afternoon. Breezy. High 53°. Wind northeast around 12 mph, gusting to 27 mph. Chance of precipitation 60 percent. Precipitation mostly less than a quarter of an inch.
Wednesday night	Clear. Patchy light fog. Low 39°. Wind north around 7 mph, gusting to 22 mph.
Thursday	Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. Light to moderate fog in the morning. High 56°. Wind north-northwest around 7 mph, gusting to 25 mph.
Thursday night	Partly cloudy in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 37°. Wind west-northwest around 5 mph, gusting to 17 mph.
Friday	Sunny. Patchy light fog in the morning. High 59°. Wind west around 6 mph, gusting to 24 mph, in the morning, becoming 10 mph, gusting to 27 mph, in the afternoon.
Friday night	Partly cloudy. Low 39°. Wind west around 4 mph, gusting to 18 mph.
Saturday	Partly cloudy in the morning, becoming mostly cloudy in the afternoon. High 53°. Wind west-northwest around 4 mph, gusting to 24 mph, in the morning, becoming 7 mph, gusting to 25 mph, in the afternoon.
Saturday night	Partly to mostly cloudy. Low 40°. Wind west-northwest around 3 mph, gusting to 18 mph.
Sunday	Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. High 59°. Wind west-southwest around 4 mph, gusting to 24 mph, in the morning, becoming 8 mph, gusting to 24 mph, in the afternoon.
Sunday night	Mostly clear in the evening, becoming partly cloudy after midnight. Low 40°. Wind south-southwest around 7 mph, gusting to 16 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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