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-Feb-2026 04:00 pm

Tonight Partly Cloudy	Sunday Mostly Cloudy	Sunday night Mostly Clear	Monday Sunny	Monday night Clear	Tuesday Partly Cloudy	Tuesday night Partly Cloudy	Wednesday Mostly Sunny

Low: 22°	High: 48°	Low: 21°	High: 60°	Low: 35°	High: 63°	Low: 34°	High: 57°
WCh: 14°
SE 7-22 mph	SE 8-20 mph	SE 4-16 mph	SSE 3-17 mph	S→SW 6 mph	NNW 5-23 mph	NNE 4-18 mph	NNE→ENE 4-22 mph

Tonight	Partly cloudy. Low 22°. Wind chill ranging from 14 to 31. Wind southeast around 7 mph, gusting to 22 mph.
Sunday	Partly to mostly cloudy. High 48°. Wind southeast around 8 mph, gusting to 20 mph.
Sunday night	Mostly clear in the evening, becoming clear after midnight. Low 21°. Wind southeast around 4 mph, gusting to 16 mph.
Monday	Sunny. Mild. High 60°. Wind south-southeast around 3 mph, gusting to 17 mph.
Monday night	Clear. Low 35°. Wind south around 6 mph in the evening, becoming southwest after midnight.
Tuesday	Partly cloudy in the morning, becoming sunny in the afternoon. Unusually mild. High 63°. Wind north-northwest around 5 mph, gusting to 23 mph.
Tuesday night	Partly cloudy in the evening, becoming mostly cloudy after midnight. Low 34°. Wind north-northeast around 4 mph, gusting to 18 mph.
Wednesday	Partly to mostly sunny. Relatively mild. High 57°. Wind north-northeast around 4 mph, gusting to 22 mph, in the morning, becoming east-northeast in the afternoon.
Wednesday night	Fair in the evening, becoming partly cloudy after midnight. Low 29°. Wind east-northeast around 4 mph, gusting to 19 mph.
Thursday	Partly to mostly cloudy in the morning, becoming cloudy in the afternoon. High 49°. Wind east around 6 mph, gusting to 19 mph.
Thursday night	Cloudy. A slight chance of rain. Low 34°. Wind east-southeast around 5 mph, gusting to 19 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Friday	Sunny in the morning, becoming partly cloudy in the afternoon. Relatively mild. High 51°. Wind east-northeast around 8 mph, gusting to 27 mph.
Friday night	Mostly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Low 32°. Wind chill ranging from 24 to 43. Wind east-southeast around 10 mph, gusting to 23 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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