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: Saturday, 07-Nov-2026 04:00 pm

Tonight Fog late	Sunday Fog a.m.	Sunday night Clear	Monday Sunny	Monday night Clear	Tuesday Sunny	Tuesday night Mostly Cloudy	Wednesday Mostly Cloudy
							<.1 in.
Low: 32°	High: 60°	Low: 34°	High: 66°	Low: 39°	High: 69°	Low: 43°	High: 62°

SW 3 mph	WSW 5-19 mph	W 3 mph	SSW calm→4-21 mph	SW 4 mph	WSW 3-18 mph	WSW calm	SW→W 3→7-21 mph

Tonight	Fair in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 32°. Wind southwest around 3 mph.
Sunday	Mostly sunny in the morning, becoming sunny in the afternoon. Patchy light fog in the morning. High 60°. Wind west-southwest around 5 mph, gusting to 19 mph.
Sunday night	Clear. Low 34°. Wind west around 3 mph.
Monday	Sunny. Mild. High 66°. Wind south-southwest near calm in the morning, becoming 4 mph, gusting to 21 mph, in the afternoon.
Monday night	Clear. Low 39°. Wind southwest around 4 mph.
Tuesday	Sunny. Mild. High 69°. Wind west-southwest around 3 mph, gusting to 18 mph.
Tuesday night	Mostly clear in the evening, becoming partly to mostly cloudy after midnight. Low 43°. Wind west-southwest near calm.
Wednesday	Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. A chance of rain. Mild. High 62°. Wind southwest around 3 mph in the morning, becoming west around 7 mph, gusting to 21 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Wednesday night	Mostly cloudy to cloudy. A slight chance of rain. Low 46°. Wind north-northwest around 8 mph, gusting to 19 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Thursday	Mostly cloudy. A slight chance of rain. High 51°. Wind north-northwest around 11 mph, gusting to 28 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Thursday night	Mostly clear. Patchy light fog after midnight. Low 34°. Wind north-northwest around 7 mph, gusting to 23 mph.
Friday	Sunny. Patchy light fog in the morning. High 48°. Wind north-northwest around 9 mph, gusting to 26 mph.
Friday night	Clear. Low 30°. Wind north-northwest around 3 mph, gusting to 19 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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