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: Saturday, 24-May-2025 04:00 pm

Tonight Mostly Cloudy	Sunday Cloudy	Sunday night Mostly Cloudy	Monday Chance rain	Monday night Mostly Cloudy	Tuesday Chance rain	Tuesday night Chance rain	Wednesday Fog a.m.
	<.1 in.	<.1 in.	.1 in.	<.1 in.	<.25 in.	.1 in.
Low: 56°	High: 72°	Low: 57°	High: 68°	Low: 55°	High: 68°	Low: 53°	High: 72°

E 5-25 mph	E 7-26 mph	E 8-24 mph	E 10-27 mph	E 8-23 mph	E→NNE 5-22 mph	NNW 7-17 mph	WNW 9-27 mph
	UV: 5 Medium		UV: 5 Medium		UV: 4 Medium		UV: 8 Very High

Tonight	Partly to mostly cloudy. Relatively cool. Low 56°. Wind east around 5 mph, gusting to 25 mph.
Sunday	Cloudy in the morning, becoming dense overcast in the afternoon. A slight chance of rain. High 72°. UV index up to 5. Wind east around 7 mph, gusting to 26 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Sunday night	Mostly cloudy in the evening, becoming mostly cloudy to cloudy after midnight. A slight chance of rain. Relatively cool. Low 57°. Wind east around 8 mph, gusting to 24 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Monday	Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. A slight chance of rain in the morning, then a chance of rain in the afternoon. Cool. High 68°. UV index up to 5. Wind east around 10 mph, gusting to 27 mph. Chance of precipitation 40 percent. Precipitation mostly around a tenth of an inch.
Monday night	Mostly cloudy to cloudy in the evening, becoming dense overcast after midnight. A chance of rain. Precipitation showery or intermittent. Relatively cool. Low 55°. Wind east around 8 mph, gusting to 23 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Tuesday	Dense overcast. A chance of rain. Precipitation showery or intermittent. Cool. High 68°. UV index up to 4. Wind east around 5 mph, gusting to 22 mph, in the morning, becoming north-northeast in the afternoon. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch.
Tuesday night	Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. Patchy light fog. A chance of rain. Cool. Low 53°. Wind north-northwest around 7 mph, gusting to 17 mph. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch.
Wednesday	Mostly cloudy in the morning, becoming partly cloudy in the afternoon. Patchy light fog in the morning. High 72°. UV index up to 8. Wind west-northwest around 9 mph, gusting to 27 mph.
Wednesday night	Fair. Cool. Low 50°. Wind west-northwest around 4 mph, gusting to 24 mph.
Thursday	Partly to mostly cloudy in the morning, becoming mostly cloudy in the afternoon. A chance of rain. High 72°. UV index up to 7. Wind west-northwest around 4 mph, gusting to 23 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Thursday night	Partly to mostly cloudy in the evening, becoming partly cloudy after midnight. Patchy light fog after midnight. A slight chance of rain. Relatively cool. Low 55°. Wind west around 4 mph, gusting to 18 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Friday	Partly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Moderate fog in the morning, then light to moderate fog in the afternoon. Rain likely. Cool. High 65°. UV index up to 6. Wind northwest around 5 mph. Chance of precipitation 70 percent. Precipitation mostly around 2 inches.
Friday night	Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Cool. Low 53°. Wind north-northwest around 5 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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