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, 27-Oct-2026 05:00 am

Today Mostly Cloudy	Tonight Partly Cloudy	Wednesday Partly Cloudy	Wednesday night Mostly Clear	Thursday Mostly Sunny	Thursday night Mostly Cloudy	Friday Chance rain	Friday night Mostly Cloudy
					<.1 in.	<.25 in.
High: 76°	Low: 54°	High: 79°	Low: 52°	High: 82°	Low: 54°	High: 69°	Low: 58°

S 4-23 mph	S 4-18 mph	S 6-24 mph	S 6-16 mph	SSW→WSW 5-24 mph	NNE 3 mph	E 5-17 mph	E→SSE 4 mph

Today	Partly to mostly cloudy. Unusually warm. High 76°. Wind south around 4 mph, gusting to 23 mph.
Tonight	Partly cloudy. Low 54°. Wind south around 4 mph, gusting to 18 mph.
Wednesday	Partly cloudy in the morning, becoming mostly sunny in the afternoon. Unusually warm. High 79°. Wind south around 6 mph, gusting to 24 mph.
Wednesday night	Fair in the evening, becoming mostly clear after midnight. Low 52°. Wind south around 6 mph, gusting to 16 mph.
Thursday	Partly to mostly sunny. Unusually hot. High 82°. Wind south-southwest around 5 mph, gusting to 24 mph, in the morning, becoming west-southwest in the afternoon.
Thursday night	Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. A chance of rain. Relatively mild. Low 54°. Wind north-northeast around 3 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Friday	Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. A chance of rain. Mild. High 69°. Wind east around 5 mph, gusting to 17 mph. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch.
Friday night	Mostly cloudy in the evening, becoming cloudy after midnight. Mild. Low 58°. Wind east around 4 mph in the evening, becoming south-southeast after midnight.
Saturday	Cloudy in the morning, becoming mostly cloudy in the afternoon. A slight chance of rain. Mild. High 71°. Wind east-southeast around 4 mph, gusting to 18 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Saturday night	Cloudy. Patchy light fog in the evening, then light to moderate fog after midnight. Rain likely. Mild. Low 61°. Wind east-southeast around 5 mph, gusting to 16 mph. Chance of precipitation 70 percent. Precipitation mostly between a quarter and half an inch.
Sunday	Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. Light to moderate fog in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon. Mild. High 68°. Wind east around 6 mph, gusting to 22 mph. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch.
Sunday night	Cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Patchy light fog. A slight chance of rain. Mild. Low 56°. Wind northwest around 5 mph, gusting to 22 mph. Chance of precipitation 20 percent. Precipitation mostly less than a tenth of an inch.
Monday	Mostly cloudy in the morning, becoming cloudy in the afternoon. Patchy light fog in the morning. High 63°. Wind north-northwest around 5 mph, gusting to 22 mph.
Monday night	Cloudy in the evening, becoming dense overcast after midnight. A chance of rain. Low 55°. Wind northeast around 6 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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