OFallon Missouri Weather

OFallon - Weather Data from OFallon, MO

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

CDT UTC Last station update CDT

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

Updated: Tuesday, 18-Mar-2025 04:00 pm

Tonight Partly Cloudy	Wednesday Thunder storm	Wednesday night Cloudy	Thursday Partly Cloudy	Thursday night Clear	Friday Partly Cloudy	Friday night Mostly Clear	Saturday Sunny
	<.1 in.	<.1 in.
Low: 58°	High: 74°	Low: 38°	High: 50°	Low: 33°	High: 63°	Low: 35°	High: 57°
		WCh: 32°
S 12-33 mph	SSW 15-34→20-38 mph	W→NW 16-36 mph	NW 12-30 mph	W→SW 5-22 mph	S 10-25→14-30 mph	W 10-25 mph	NW 7-25 mph
	UV: 6 High		UV: 6 High		UV: 5 Medium		UV: 6 High

Tonight	Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Breezy and mild. Low 58°. Wind south around 12 mph, gusting to 33 mph.
Wednesday	Partly cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon. Scattered thunderstorms likely. Windy and unusually warm. High 74°. UV index up to 6. Wind south-southwest around 15 mph, gusting to 34 mph, in the morning, becoming 20 mph, gusting to 38 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Wednesday night	Dense overcast in the evening, becoming cloudy after midnight. A chance of rain. Precipitation showery or intermittent. Windy. Low 38°. Wind chill ranging from 32 to 56. Wind west around 16 mph, gusting to 36 mph, in the evening, becoming northwest after midnight. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Thursday	Partly cloudy in the morning, becoming sunny in the afternoon. Breezy. High 50°. UV index up to 6. Wind northwest around 12 mph, gusting to 30 mph.
Thursday night	Clear in the evening, becoming fair after midnight. Low 33°. Wind west around 5 mph, gusting to 22 mph, in the evening, becoming southwest after midnight.
Friday	Partly cloudy. Breezy. High 63°. UV index up to 5. Wind south around 10 mph, gusting to 25 mph, in the morning, becoming 14 mph, gusting to 30 mph, in the afternoon.
Friday night	Mostly clear. Low 35°. Wind west around 10 mph, gusting to 25 mph.
Saturday	Sunny. High 57°. UV index up to 6. Wind northwest around 7 mph, gusting to 25 mph.
Saturday night	Partly cloudy in the evening, becoming cloudy after midnight. A chance of rain after midnight. Low 40°. Wind southeast around 4 mph in the evening, becoming 8 mph, gusting to 15 mph, after midnight. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Sunday	Cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Rain likely in the morning, then a chance of rain in the afternoon. High 56°. UV index up to 5. Wind south-southeast around 9 mph, gusting to 25 mph, in the morning, becoming south-southwest in the afternoon. Chance of precipitation 70 percent. Precipitation mostly around half an inch.
Sunday night	Fair in the evening, becoming clear after midnight. Low 39°. Wind west around 9 mph, gusting to 20 mph.
Monday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Breezy. High 55°. UV index up to 6. Wind west-northwest around 11 mph, gusting to 29 mph.
Monday night	Cloudy in the evening, becoming dense overcast after midnight. A chance of rain. Low 41°. Wind west-northwest around 5 mph, gusting to 21 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.

WXSIM forecast formatting script by Saratoga-Weather.org.

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