| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
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| Updated: Sunday, 12-Apr-2026 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Today |
Sunny. Exceptionally hot. High 91°. UV index up to 8. Wind south around 8 mph, gusting to 29 mph. |
| Tonight |
Mostly clear in the evening, becoming clear after midnight. Low 57°. Wind south around 7 mph, gusting to 26 mph. |
| Monday |
Sunny. Breezy and unusually hot. High 88°. UV index up to 8. Wind south around 9 mph, gusting to 31 mph, in the morning, becoming 14 mph, gusting to 32 mph, in the afternoon. |
| Monday night |
Clear. Low 55°. Wind south around 10 mph, gusting to 28 mph. |
| Tuesday |
Sunny. Breezy and unusually hot. High 86°. UV index up to 8. Wind south around 12 mph, gusting to 31 mph. |
| Tuesday night |
Clear. Low 54°. Wind south around 10 mph, gusting to 28 mph. |
| Wednesday |
Sunny. Breezy and unusually hot. High 83°. UV index up to 8. Wind south around 12 mph, gusting to 32 mph. |
| Wednesday night |
Clear. Low 53°. Wind south around 10 mph, gusting to 28 mph. |
| Thursday |
Sunny. Breezy and unusually hot. High 82°. UV index up to 8. Wind south around 12 mph, gusting to 32 mph. |
| Thursday night |
Clear. Low 52°. Wind south around 10 mph, gusting to 29 mph. |
| Friday |
Sunny. Breezy and unusually warm. High 81°. UV index up to 8. Wind south around 12 mph, gusting to 32 mph. |
| Friday night |
Clear. Low 52°. Wind south around 10 mph, gusting to 29 mph. |
| Saturday |
Sunny. Breezy and warm. High 80°. UV index up to 9. Wind south around 12 mph, gusting to 32 mph. |
| Saturday night |
Clear. Low 53°. Wind south around 11 mph, gusting to 29 mph. |
WXSIM forecast formatting script by Saratoga-Weather.org.
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