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, 31-Oct-2025 05:00 am

Today Partly Cloudy	Tonight Mostly Cloudy	Saturday Mostly Cloudy	Saturday night Fog late	Sunday Fog a.m.	Sunday night Fog late	Monday Fog a.m.	Monday night Partly Cloudy
		<.1 in.
High: 62°	Low: 42°	High: 55°	Low: 37°	High: 57°	Low: 36°	High: 63°	Low: 38°

WSW 3-24→7-24 mph	W 4-17 mph	WNW 5-24 mph	WNW 4-21 mph	NW→WSW 2-19 mph	S 4 mph	SW→WNW 6-24 mph	NW→NNE 2 mph

Today	Sunny in the morning, becoming partly cloudy in the afternoon. High 62°. Wind west-southwest around 3 mph, gusting to 24 mph, in the morning, becoming 7 mph, gusting to 24 mph, in the afternoon.
Tonight	Partly to mostly cloudy. Low 42°. Wind west around 4 mph, gusting to 17 mph.
Saturday	Partly to mostly cloudy in the morning, becoming cloudy in the afternoon. A chance of rain. High 55°. Wind west-northwest around 5 mph, gusting to 24 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Saturday night	Partly cloudy in the evening, becoming mostly clear after midnight. Patchy light fog after midnight. Low 37°. Wind west-northwest around 4 mph, gusting to 21 mph.
Sunday	Sunny. Patchy light fog in the morning. High 57°. Wind northwest around 2 mph, gusting to 19 mph, in the morning, becoming west-southwest in the afternoon.
Sunday night	Clear. Light to moderate fog after midnight. Low 36°. Wind south around 4 mph.
Monday	Sunny. Light to moderate fog in the morning. High 63°. Wind southwest around 6 mph, gusting to 24 mph, in the morning, becoming west-northwest in the afternoon.
Monday night	Mostly clear in the evening, becoming partly cloudy after midnight. Low 38°. Wind northwest around 2 mph in the evening, becoming north-northeast after midnight.
Tuesday	Partly cloudy in the morning, becoming sunny in the afternoon. Mild. High 65°. Wind south-southeast around 4 mph, gusting to 18 mph, in the morning, becoming 9 mph, gusting to 25 mph, in the afternoon.
Tuesday night	Mostly clear in the evening, becoming partly cloudy after midnight. Low 42°. Wind south around 9 mph, gusting to 18 mph.
Wednesday	Sunny. Warm. High 72°. Wind west-southwest around 9 mph, gusting to 28 mph, in the morning, becoming west-northwest in the afternoon.
Wednesday night	Clear. Low 36°. Wind north-northwest around 3 mph, gusting to 16 mph.
Thursday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. Mild. High 65°. Wind southeast around 3 mph, gusting to 26 mph, in the morning, becoming 10 mph, gusting to 28 mph, in the afternoon.
Thursday night	Mostly clear in the evening, becoming partly cloudy after midnight. Low 43°. Wind southeast around 9 mph, gusting to 21 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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