| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
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| Updated: Wednesday, 15-Apr-2026 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Today |
Sunny. Exceptionally hot. High 90°. UV index up to 8. Wind south around 9 mph, gusting to 30 mph, in the morning, becoming 13 mph, gusting to 32 mph, in the afternoon. |
| Tonight |
Clear. Mild. Low 66°. Wind south-southwest around 10 mph, gusting to 28 mph. |
| Thursday |
Sunny. Breezy and exceptionally hot. High 93°. UV index up to 8. Wind south-southwest around 12 mph, gusting to 30 mph. |
| Thursday night |
Clear. Mild. Low 64°. Wind south-southwest around 10 mph, gusting to 28 mph. |
| Friday |
Sunny. Breezy and exceptionally hot. High 93°. UV index up to 8. Wind south-southwest around 12 mph, gusting to 31 mph. |
| Friday night |
Clear. Mild. Low 62°. Wind south-southwest around 10 mph, gusting to 28 mph. |
| Saturday |
Sunny. Breezy and exceptionally hot. High 92°. UV index up to 8. Wind south-southwest around 12 mph, gusting to 31 mph. |
| Saturday night |
Clear. Low 61°. Wind south-southwest around 10 mph, gusting to 28 mph. |
| Sunday |
Sunny. Breezy and exceptionally hot. High 90°. UV index up to 9. Wind south-southwest around 12 mph, gusting to 31 mph. |
| Sunday night |
Clear. Low 60°. Wind south-southwest around 10 mph, gusting to 28 mph. |
| Monday |
Sunny. Breezy and unusually hot. High 89°. UV index up to 9. Wind south-southwest around 13 mph, gusting to 31 mph. |
| Monday night |
Clear. Low 59°. Wind south-southwest around 10 mph, gusting to 28 mph. |
| Tuesday |
Sunny. Breezy and unusually hot. High 87°. UV index up to 9. Wind south-southwest around 13 mph, gusting to 32 mph. |
| Tuesday night |
Clear. Low 60°. Wind south-southwest around 10 mph, gusting to 28 mph. |
WXSIM forecast formatting script by Saratoga-Weather.org.
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