OFallon Missouri Weather

OFallon - Weather Data from OFallon, MO

Latitude: N 38° 50' 20" Longitude: W 90° 43' 42" Altitude: 532 ft

CST UTC Last station update CST

WXSIM Forecast for: O'Fallon
Issued by: OFallonweather.com

Updated: Sunday, 02-Nov-2025 07:00 pm

Tonight Partly Cloudy	Monday Mostly Cloudy	Monday night Partly Cloudy	Tuesday Partly Cloudy	Tuesday night Partly Cloudy	Wednesday Mostly Sunny	Wednesday night Partly Cloudy	Thursday Mostly Sunny

Low: 33°	High: 59°	Low: 32°	High: 62°	Low: 40°	High: 70°	Low: 43°	High: 73°

SSW calm→4 mph	SSW 7-23 mph	WNW→E 0-16 mph	SE 2-16→10-25 mph	SSE 7-19 mph	SSE 9-27 mph	SSE 7-20 mph	SSE 9-27 mph

Tonight	Fair to partly cloudy in the evening, becoming partly cloudy after midnight. Low 33°. Wind south-southwest near calm in the evening, becoming 4 mph after midnight.
Monday	Partly to mostly cloudy. High 59°. Wind south-southwest around 7 mph, gusting to 23 mph.
Monday night	Partly cloudy in the evening, becoming fair after midnight. Low 32°. Wind west-northwest around 0 mph, gusting to 16 mph, in the evening, becoming east after midnight.
Tuesday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. High 62°. Wind southeast around 2 mph, gusting to 16 mph, in the morning, becoming 10 mph, gusting to 25 mph, in the afternoon.
Tuesday night	Fair to partly cloudy. Low 40°. Wind south-southeast around 7 mph, gusting to 19 mph.
Wednesday	Partly to mostly sunny. Mild. High 70°. Wind south-southeast around 9 mph, gusting to 27 mph.
Wednesday night	Fair to partly cloudy. Low 43°. Wind south-southeast around 7 mph, gusting to 20 mph.
Thursday	Partly to mostly sunny. Warm. High 73°. Wind south-southeast around 9 mph, gusting to 27 mph.
Thursday night	Fair to partly cloudy. Low 45°. Wind south-southeast around 7 mph, gusting to 19 mph.
Friday	Partly to mostly sunny. Unusually warm. High 74°. Wind south-southeast around 8 mph, gusting to 26 mph.
Friday night	Fair to partly cloudy. Low 46°. Wind south-southeast around 7 mph, gusting to 18 mph.
Saturday	Partly to mostly sunny. Unusually warm. High 74°. Wind south-southeast around 8 mph, gusting to 26 mph.
Saturday night	Fair to partly cloudy. Low 46°. Wind south-southeast around 7 mph, gusting to 18 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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