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: Friday, 29-Aug-2025 04:00 pm

Tonight Mostly Clear	Saturday Mostly Sunny	Saturday night Partly Cloudy	Sunday Partly Cloudy	Sunday night Mostly Cloudy	Monday Cloudy	Monday night Mostly Cloudy	Tuesday Mostly Cloudy
					<.1 in.
Low: 61°	High: 85°	Low: 60°	High: 84°	Low: 64°	High: 75°	Low: 60°	High: 83°

E 4-23 mph	E 5-24 mph	E 5-21 mph	ENE 5-25 mph	ENE 3-21 mph	ENE 4-22 mph	ESE→NNE 2-19 mph	NNE→ENE 4-23 mph
	UV: 7 High		UV: 7 High				UV: 7 High

Tonight	Mostly clear in the evening, becoming fair after midnight. Low 61°. Wind east around 4 mph, gusting to 23 mph.
Saturday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. High 85°. UV index up to 7. Wind east around 5 mph, gusting to 24 mph.
Saturday night	Partly to mostly cloudy in the evening, becoming partly cloudy after midnight. Low 60°. Wind east around 5 mph, gusting to 21 mph.
Sunday	Partly cloudy. High 84°. UV index up to 7. Wind east-northeast around 5 mph, gusting to 25 mph.
Sunday night	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. Low 64°. Wind east-northeast around 3 mph, gusting to 21 mph.
Monday	Cloudy. A chance of rain. High 75°. Wind east-northeast around 4 mph, gusting to 22 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Monday night	Partly to mostly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Low 60°. Wind east-southeast around 2 mph, gusting to 19 mph, in the evening, becoming north-northeast after midnight.
Tuesday	Partly to mostly cloudy in the morning, becoming sunny in the afternoon. High 83°. UV index up to 7. Wind north-northeast around 4 mph, gusting to 23 mph, in the morning, becoming east-northeast in the afternoon.
Tuesday night	Mostly clear in the evening, becoming clear after midnight. Relatively cool. Low 57°. Wind west-southwest around 4 mph, gusting to 16 mph, in the evening, becoming north-northwest after midnight.
Wednesday	Mostly sunny in the morning, becoming partly to mostly cloudy in the afternoon. High 78°. UV index up to 5. Wind north-northwest around 6 mph, gusting to 22 mph, in the morning, becoming 12 mph, gusting to 27 mph, in the afternoon.
Wednesday night	Clear. Relatively cool. Low 55°. Wind north-northwest around 10 mph, gusting to 24 mph, in the evening, becoming 4 mph, gusting to 17 mph, after midnight.
Thursday	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. High 76°. UV index up to 6. Wind north-northwest around 3 mph, gusting to 23 mph.
Thursday night	Fair to partly cloudy in the evening, becoming mostly clear after midnight. Relatively cool. Low 55°. Wind south-southeast around 5 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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