WXSIM Forecast for: O'Fallon
Issued by: OFallonweather.com
Updated: Friday, 06-Nov-2026 05:00 am
 
Today

Mostly Cloudy
Mostly Cloudy
Tonight

Clear
Clear
Saturday

Partly Cloudy
Partly Cloudy
Saturday
night
Clear
Clear
Sunday

Sunny
Sunny
Sunday
night
Clear
Clear
Monday

Sunny
Sunny
Monday
night
Clear
Clear
High: 60° Low: 36° High: 60° Low: 35° High: 67° Low: 36° High: 69° Low: 40°
               
N
6-31
mph
N
3-20
mph
WNW
1-21
mph
SSW
2
mph
SW→W
5-23
mph
W
3
mph
SW
2→5-22
mph
SW
4
mph

 

Today
 
Partly to mostly cloudy in the morning, becoming sunny in the afternoon. High 60°. Wind north around 6 mph, gusting to 31 mph.
Tonight
 
Clear. Low 36°. Wind north around 3 mph, gusting to 20 mph.
Saturday
 
Sunny in the morning, becoming partly cloudy in the afternoon. High 60°. Wind west-northwest around 1 mph, gusting to 21 mph.
Saturday night
 
Clear. Low 35°. Wind south-southwest around 2 mph.
Sunday
 
Sunny. Mild. High 67°. Wind southwest around 5 mph, gusting to 23 mph, in the morning, becoming west in the afternoon.
Sunday night
 
Clear. Low 36°. Wind west around 3 mph.
Monday
 
Sunny. Mild. High 69°. Wind southwest around 2 mph in the morning, becoming 5 mph, gusting to 22 mph, in the afternoon.
Monday night
 
Clear. Low 40°. Wind southwest around 4 mph.
Tuesday
 
Sunny. Mild. High 69°. Wind west around 4 mph, gusting to 21 mph.
Tuesday night
 
Fair in the evening, becoming partly cloudy after midnight. Low 40°. Wind northwest around 2 mph.
Wednesday
 
Partly to mostly sunny in the morning, becoming sunny in the afternoon. Mild. High 66°. Wind north-northwest around 2 mph, gusting to 19 mph.
Wednesday night
 
Fair in the evening, becoming partly cloudy after midnight. Low 39°. Wind north-northwest around 5 mph, gusting to 16 mph.
Thursday
 
Partly to mostly cloudy in the morning, becoming cloudy in the afternoon. High 52°. Wind north-northeast around 7 mph, gusting to 24 mph.
Thursday night
 
Partly cloudy. Low 37°. Wind north-northeast around 4 mph, gusting to 21 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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