WXSIM Forecast for: O'Fallon
Issued by: OFallonweather.com
Updated: Sunday, 16-Jun-2024 04:00 pm
 
Tonight

Fog late
Fog late
Monday

Fog a.m.
Hot!
Fog a.m.
Hot!
Monday
night
Fog late
Fog late
Tuesday

Fog a.m.
Hot!
Fog a.m.
Hot!
Tuesday
night
Partly Cloudy
Partly Cloudy
Wednesday

Thunder storm
Thunder storm
Wednesday
night
Cloudy
Cloudy
Thursday

Mostly Cloudy
Hot!
Mostly Cloudy
Hot!
<.1 in.
Low: 73° High: 96° Low: 73° High: 94° Low: 73° High: 89° Low: 74° High: 96°
  Heat: 104°   Heat: 102°   Heat: 96°   Heat: 105°
S
5-23
mph
S
8-28→13-29
mph
S
12-27→8-22
mph
S
11-31
mph
S
11-28→4
mph
SSW
3-20
mph
S→W
1-18
mph
ENE
3-24
mph
UV: 7
 High 
UV: 8
 Very High 
UV: 7
 High 
UV: 6
 High 

 

Tonight
 
Partly cloudy in the evening, becoming fair after midnight. Moderate fog after midnight. Low 73°. Wind south around 5 mph, gusting to 23 mph.
Monday
 
Partly to mostly sunny in the morning, becoming partly to mostly cloudy in the afternoon. Light to moderate fog in the morning. Very hot. High 96°. Heat index up to 104°. UV index up to 7. Wind south around 8 mph, gusting to 28 mph, in the morning, becoming 13 mph, gusting to 29 mph, in the afternoon.
Monday night
 
Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Patchy light fog after midnight. Low 73°. Wind south around 12 mph, gusting to 27 mph, in the evening, becoming 8 mph, gusting to 22 mph, after midnight.
Tuesday
 
Mostly sunny in the morning, becoming partly to mostly cloudy in the afternoon. Patchy light fog in the morning. Breezy and hot. High 94°. Heat index up to 102°. UV index up to 8. Wind south around 11 mph, gusting to 31 mph.
Tuesday night
 
Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 73°. Wind south around 11 mph, gusting to 28 mph, in the evening, becoming 4 mph after midnight.
Wednesday
 
Cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon. Scattered thunderstorms likely, some possibly severe. Hot. High 89°. Heat index up to 96°. UV index up to 7. Wind south-southwest around 3 mph, gusting to 20 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch.
Wednesday night
 
Cloudy. Low 74°. Wind south around 1 mph, gusting to 18 mph, in the evening, becoming west after midnight.
Thursday
 
Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Very hot. High 96°. Heat index up to 105°. UV index up to 6. Wind east-northeast around 3 mph, gusting to 24 mph.
Thursday night
 
Mostly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 73°. Wind northeast around 2 mph, gusting to 22 mph, in the evening, becoming east after midnight.
Friday
 
Mostly cloudy to cloudy. A chance of rain. Thunderstorms very likely, some severe. Hot. High 93°. Heat index up to 103°. UV index up to 7. Wind south-southeast around 2 mph, gusting to 22 mph, in the morning, becoming north-northeast in the afternoon. Chance of precipitation 50 percent. Precipitation mostly less than a tenth of an inch.
Friday night
 
Partly cloudy in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 72°. Wind east-southeast around 4 mph, gusting to 18 mph, in the evening, becoming south-southwest after midnight.
Saturday
 
Mostly sunny in the morning, becoming sunny in the afternoon. Patchy light fog in the morning. Very hot. High 96°. Heat index up to 105°. UV index up to 10. Wind west-southwest around 4 mph, gusting to 25 mph, in the morning, becoming 8 mph, gusting to 26 mph, in the afternoon.
Saturday night
 
Fair in the evening, becoming partly cloudy after midnight. Patchy light fog after midnight. Low 73°. Wind west-southwest around 5 mph, gusting to 23 mph.

WXSIM forecast formatting script by Saratoga-Weather.org.

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