WXSIM Forecast for: O'Fallon
Issued by: OFallonweather.com
Updated: Thursday, 23-May-2024 04:00 pm
 
Tonight

Fog
Fog
Friday

Thunder storm
Thunder storm
Friday
night
Thunder storm
Thunder storm
Saturday

Mostly Sunny
Mostly Sunny
Saturday
night
Thunder storm
Thunder storm
Sunday

Thunder storm
Thunder storm
Sunday
night
Fog late
Fog late
Monday

Thunder storm
Thunder storm
<.1 in. <.1 in. <.25 in. .25 in. <.1 in.
Low: 67° High: 88° Low: 58° High: 81° Low: 67° High: 90° Low: 64° High: 78°
          Heat: 97°    
ESE
5-23
mph
SSE→SW
8-27→11-29
mph
WNW
8-24
mph
NE→ESE
7-24
mph
ESE
9-23→12-22
mph
SW
14-31→18-34
mph
W
10-31→5
mph
WNW
7-25→11-28
mph
UV: 7
 High 
UV: 7
 High 
UV: 8
 Very High 
UV: 7
 High 

 

Tonight
 
Fair to partly cloudy in the evening, becoming mostly cloudy after midnight. Patchy light fog. Low 67°. Wind east-southeast around 5 mph, gusting to 23 mph.
Friday
 
Mostly cloudy in the morning, becoming partly cloudy in the afternoon. Patchy light fog in the morning. A chance of rain. Scattered thunderstorms likely, some possibly severe. Hot. High 88°. UV index up to 7. Wind south-southeast around 8 mph, gusting to 27 mph, in the morning, becoming southwest around 11 mph, gusting to 29 mph, in the afternoon. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Friday night
 
Partly cloudy in the evening, becoming clear after midnight. A chance of rain. Thunderstorms very likely, some severe. Low 58°. Wind west-northwest around 8 mph, gusting to 24 mph. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Saturday
 
Sunny in the morning, becoming mostly sunny in the afternoon. High 81°. UV index up to 7. Wind northeast around 7 mph, gusting to 24 mph, in the morning, becoming east-southeast in the afternoon.
Saturday night
 
Fair in the evening, becoming cloudy after midnight. Rain likely after midnight. Thunderstorms very likely, some severe. Low 67°. Wind east-southeast around 9 mph, gusting to 23 mph, in the evening, becoming 12 mph, gusting to 22 mph, after midnight. Chance of precipitation 70 percent. Precipitation mostly less than a quarter of an inch.
Sunday
 
Partly cloudy in the morning, becoming sunny in the afternoon. Patchy light fog in the morning. Rain likely. Thunderstorms very likely, some severe. Breezy and hot. High 90°. Heat index up to 97°. UV index up to 8. Wind southwest around 14 mph, gusting to 31 mph, in the morning, becoming 18 mph, gusting to 34 mph, in the afternoon. Chance of precipitation 80 percent. Precipitation mostly around a quarter of an inch.
Sunday night
 
Clear. Patchy light fog after midnight. Low 64°. Wind west around 10 mph, gusting to 31 mph, in the evening, becoming 5 mph after midnight.
Monday
 
Partly to mostly sunny. A chance of rain. Scattered thunderstorms likely, some possibly severe. High 78°. UV index up to 7. Wind west-northwest around 7 mph, gusting to 25 mph, in the morning, becoming 11 mph, gusting to 28 mph, in the afternoon. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch.
Monday night
 
Clear. Relatively cool. Low 57°. Wind northwest around 7 mph, gusting to 27 mph, in the evening, becoming 3 mph after midnight.
Tuesday
 
Sunny. High 81°. UV index up to 8. Wind west around 5 mph, gusting to 25 mph, in the morning, becoming 9 mph, gusting to 28 mph, in the afternoon.
Tuesday night
 
Fair in the evening, becoming fair to partly cloudy after midnight. Relatively cool. Low 56°. Wind northwest around 7 mph, gusting to 26 mph.
Wednesday
 
Sunny. High 71°. UV index up to 8. Wind northwest around 10 mph, gusting to 29 mph.
Wednesday night
 
Fair in the evening, becoming clear after midnight. Cool. Low 52°. Wind north around 5 mph, gusting to 24 mph, in the evening, becoming east after midnight.

WXSIM forecast formatting script by Saratoga-Weather.org.

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