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: Tuesday, 24-Feb-2026 05:00 am

Today Mostly Cloudy	Tonight Mostly Cloudy	Wednesday Partly Cloudy	Wednesday night Mostly Cloudy	Thursday Mostly Cloudy	Thursday night Clear	Friday Sunny	Friday night Partly Cloudy

High: 51°	Low: 31°	High: 54°	Low: 31°	High: 55°	Low: 28°	High: 65°	Low: 29°

S 9-21→13-25 mph	WSW→WNW 10-21→4 mph	NNW 3-21 mph	ENE 3→6 mph	ENE 5-21 mph	ESE→SW 2 mph	SW 5-19→10-25 mph	SW→NW 6-18 mph

Today	Partly to mostly cloudy in the morning, becoming mostly cloudy in the afternoon. High 51°. Wind south around 9 mph, gusting to 21 mph, in the morning, becoming 13 mph, gusting to 25 mph, in the afternoon.
Tonight	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. Low 31°. Wind west-southwest around 10 mph, gusting to 21 mph, in the evening, becoming west-northwest around 4 mph after midnight.
Wednesday	Partly cloudy. Relatively mild. High 54°. Wind north-northwest around 3 mph, gusting to 21 mph.
Wednesday night	Mostly cloudy. Low 31°. Wind east-northeast around 3 mph in the evening, becoming 6 mph after midnight.
Thursday	Mostly cloudy in the morning, becoming mostly sunny in the afternoon. Relatively mild. High 55°. Wind east-northeast around 5 mph, gusting to 21 mph.
Thursday night	Clear. Low 28°. Wind east-southeast around 2 mph in the evening, becoming southwest after midnight.
Friday	Sunny. Mild. High 65°. Wind southwest around 5 mph, gusting to 19 mph, in the morning, becoming 10 mph, gusting to 25 mph, in the afternoon.
Friday night	Fair to partly cloudy in the evening, becoming clear after midnight. Low 29°. Wind southwest around 6 mph, gusting to 18 mph, in the evening, becoming northwest after midnight.
Saturday	Partly to mostly sunny in the morning, becoming mostly sunny in the afternoon. Mild. High 61°. Wind east-northeast around 5 mph, gusting to 22 mph.
Saturday night	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 31°. Wind chill ranging from 25 to 54. Wind northeast around 9 mph, gusting to 19 mph.
Sunday	Partly to mostly cloudy in the morning, becoming cloudy in the afternoon. High 46°. Wind northeast around 9 mph, gusting to 24 mph.
Sunday night	Dense overcast in the evening, becoming cloudy after midnight. A chance of rain. Low 33°. Wind east around 7 mph, gusting to 21 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Monday	Dense overcast. A chance of rain. High 53°. Wind south-southeast around 4 mph in the morning, becoming south-southwest in the afternoon. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch.
Monday night	Dense overcast. Patchy light fog after midnight. A chance of rain in the evening, then rain likely after midnight. Low 41°. Wind north around 6 mph. Chance of precipitation 70 percent. Precipitation mostly around a quarter of an inch.

WXSIM forecast formatting script by Saratoga-Weather.org.

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