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, 03-Sep-2025 05:00 am

Today Partly Cloudy	Tonight Mostly Cloudy	Thursday Mostly Sunny	Thursday night Mostly Clear	Friday Mostly Cloudy	Friday night Partly Cloudy	Saturday Sunny	Saturday night Mostly Clear
	<.1 in.				<.1 in.
High: 81°	Low: 56°	High: 76°	Low: 56°	High: 76°	Low: 52°	High: 76°	Low: 50°

W 4-22→7-23 mph	NNW 5-17 mph	NNW→WNW 4-23 mph	SSW 3-16→6 mph	NW 7-25 mph	W 3-18 mph	W 4-23 mph	W→NNW 3-18 mph
UV: 6 High		UV: 7 High		UV: 5 Medium		UV: 7 High

Today	Sunny in the morning, becoming partly cloudy in the afternoon. High 81°. UV index up to 6. Wind west around 4 mph, gusting to 22 mph, in the morning, becoming 7 mph, gusting to 23 mph, in the afternoon.
Tonight	Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. A chance of rain. Relatively cool. Low 56°. Wind north-northwest around 5 mph, gusting to 17 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Thursday	Partly to mostly sunny in the morning, becoming sunny in the afternoon. High 76°. UV index up to 7. Wind north-northwest around 4 mph, gusting to 23 mph, in the morning, becoming west-northwest in the afternoon.
Thursday night	Clear in the evening, becoming mostly clear after midnight. Relatively cool. Low 56°. Wind south-southwest around 3 mph, gusting to 16 mph, in the evening, becoming 6 mph after midnight.
Friday	Mostly cloudy in the morning, becoming cloudy in the afternoon. High 76°. UV index up to 5. Wind northwest around 7 mph, gusting to 25 mph.
Friday night	Mostly cloudy to cloudy in the evening, becoming partly cloudy after midnight. A chance of rain. Cool. Low 52°. Wind west around 3 mph, gusting to 18 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Saturday	Sunny. High 76°. UV index up to 7. Wind west around 4 mph, gusting to 23 mph.
Saturday night	Mostly clear in the evening, becoming fair after midnight. Unusually cool. Low 50°. Wind west around 3 mph, gusting to 18 mph, in the evening, becoming north-northwest after midnight.
Sunday	Sunny. High 76°. UV index up to 7. Wind north-northeast around 5 mph, gusting to 24 mph.
Sunday night	Clear in the evening, becoming mostly clear after midnight. Unusually cool. Low 49°. Wind north-northeast around 3 mph, gusting to 19 mph, in the evening, becoming east after midnight.
Monday	Mostly sunny. High 79°. UV index up to 6. Wind east around 3 mph, gusting to 22 mph.
Monday night	Mostly cloudy in the evening, becoming partly cloudy after midnight. Relatively cool. Low 53°. Wind east around 4 mph, gusting to 18 mph, in the evening, becoming southeast after midnight.
Tuesday	Mostly sunny in the morning, becoming sunny in the afternoon. Warm. High 85°. UV index up to 7. Wind south around 5 mph, gusting to 22 mph, in the morning, becoming southeast in the afternoon.
Tuesday night	Partly cloudy in the evening, becoming fair after midnight. Relatively cool. Low 57°. Wind east around 4 mph, gusting to 18 mph, in the evening, becoming south-southeast after midnight.

WXSIM forecast formatting script by Saratoga-Weather.org.

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