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: Friday, 13-Nov-2026 04:00 pm

Tonight Partly Cloudy	Saturday Mostly Sunny	Saturday night Partly Cloudy	Sunday Partly Cloudy	Sunday night Partly Cloudy	Monday Mostly Sunny	Monday night Partly Cloudy	Tuesday Mostly Sunny

Low: 23°	High: 47°	Low: 25°	High: 50°	Low: 29°	High: 55°	Low: 32°	High: 58°

NW 4-25 mph	NNW→NNE 2-19 mph	ENE calm	ENE 1-18 mph	ENE calm	SSE 1-20 mph	ESE→S 3 mph	S 4-22 mph

Tonight	Partly cloudy in the evening, becoming mostly clear after midnight. Cold. Low 23°. Wind northwest around 4 mph, gusting to 25 mph.
Saturday	Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. High 47°. Wind north-northwest around 2 mph, gusting to 19 mph, in the morning, becoming north-northeast in the afternoon.
Saturday night	Fair to partly cloudy in the evening, becoming fair after midnight. Low 25°. Wind east-northeast near calm.
Sunday	Mostly sunny in the morning, becoming partly cloudy in the afternoon. High 50°. Wind east-northeast around 1 mph, gusting to 18 mph.
Sunday night	Fair to partly cloudy. Low 29°. Wind east-northeast near calm.
Monday	Partly to mostly sunny. High 55°. Wind south-southeast around 1 mph, gusting to 20 mph.
Monday night	Fair to partly cloudy. Low 32°. Wind east-southeast around 3 mph in the evening, becoming south after midnight.
Tuesday	Partly to mostly sunny. Relatively mild. High 58°. Wind south around 4 mph, gusting to 22 mph.
Tuesday night	Fair to partly cloudy in the evening, becoming fair after midnight. Low 33°. Wind southeast around 5 mph, gusting to 16 mph.
Wednesday	Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Mild. High 61°. Wind southeast around 5 mph, gusting to 16 mph, in the morning, becoming 8 mph, gusting to 22 mph, in the afternoon.
Wednesday night	Partly cloudy in the evening, becoming mostly cloudy after midnight. Low 41°. Wind south-southeast around 8 mph, gusting to 16 mph.
Thursday	Dense overcast in the morning, becoming cloudy in the afternoon. A chance of rain in the morning, then a slight chance of rain in the afternoon. High 57°. Wind south-southwest around 6 mph. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch.
Thursday night	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. A slight chance of rain. Low 47°. Wind south-southwest around 2 mph in the evening, becoming southeast after midnight. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.

WXSIM forecast formatting script by Saratoga-Weather.org.

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