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, 14-Nov-2025 05:00 am

Today Mostly Sunny	Tonight Partly Cloudy	Saturday Partly Cloudy	Saturday night Clear	Sunday Mostly Sunny	Sunday night Clear	Monday Chance rain	Monday night Rain likely
						<.25 in.	.5 in.
High: 81°	Low: 59°	High: 81°	Low: 43°	High: 67°	Low: 36°	High: 65°	Low: 51°

SSW 6-25 mph	SSW 6 mph	SSW→W 8-29 mph	NW 5-18 mph	N 3-23 mph	ENE calm	E 4-20→7-26 mph	E 7-20 mph

Today	Mostly sunny. Exceptionally hot. High 81°. Wind south-southwest around 6 mph, gusting to 25 mph.
Tonight	Fair to partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Unusually mild. Low 59°. Wind south-southwest around 6 mph.
Saturday	Partly cloudy in the morning, becoming mostly sunny in the afternoon. Exceptionally hot. High 81°. Wind south-southwest around 8 mph, gusting to 29 mph, in the morning, becoming west in the afternoon.
Saturday night	Fair in the evening, becoming clear after midnight. Low 43°. Wind northwest around 5 mph, gusting to 18 mph.
Sunday	Sunny in the morning, becoming partly to mostly sunny in the afternoon. Mild. High 67°. Wind north around 3 mph, gusting to 23 mph.
Sunday night	Clear. Low 36°. Wind east-northeast near calm.
Monday	Mostly sunny in the morning, becoming partly to mostly cloudy in the afternoon. A chance of rain in the afternoon. Mild. High 65°. Wind east around 4 mph, gusting to 20 mph, in the morning, becoming 7 mph, gusting to 26 mph, in the afternoon. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch.
Monday night	Cloudy in the evening, becoming mostly cloudy to cloudy after midnight. Patchy light fog in the evening, then light to moderate fog after midnight. A chance of rain in the evening, then rain likely after midnight. Relatively mild. Low 51°. Wind east around 7 mph, gusting to 20 mph. Chance of precipitation 70 percent. Precipitation mostly around half an inch.
Tuesday	Cloudy in the morning, becoming mostly cloudy in the afternoon. Light to moderate fog in the morning. Relatively mild. High 58°. Wind east around 4 mph, gusting to 22 mph, in the morning, becoming north-northwest in the afternoon.
Tuesday night	Partly cloudy. Low 37°. Wind northeast around 3 mph, gusting to 18 mph.
Wednesday	Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. A chance of rain in the morning, then a slight chance of rain in the afternoon. Mild. High 59°. Wind east-southeast around 5 mph. Chance of precipitation 40 percent. Precipitation mostly around a tenth of an inch.
Wednesday night	Mostly cloudy. Patchy light fog. A slight chance of rain in the evening, then a chance of rain after midnight. Relatively mild. Low 50°. Wind southeast around 7 mph, gusting to 15 mph. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Thursday	Cloudy in the morning, becoming mostly cloudy in the afternoon. Patchy light fog in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon. Relatively mild. High 59°. Wind south-southwest around 6 mph, gusting to 17 mph, in the morning, becoming northwest around 10 mph, gusting to 24 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Thursday night	Partly to mostly cloudy in the evening, becoming mostly clear after midnight. Patchy light fog after midnight. Low 40°. Wind northwest around 9 mph, gusting to 20 mph, in the evening, becoming 4 mph after midnight.

WXSIM forecast formatting script by Saratoga-Weather.org.

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