| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
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| Updated: Wednesday, 15-Apr-2026 04:00 pm | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Tonight |
Mostly clear in the evening, becoming clear after midnight. Patchy light fog. Low 54°. Wind south-southwest around 11 mph, gusting to 26 mph. |
| Thursday |
Sunny. Patchy light fog in the morning. Breezy and unusually hot. High 82°. UV index up to 8. Wind south-southwest around 13 mph, gusting to 31 mph. |
| Thursday night |
Clear. Low 54°. Wind south-southwest around 11 mph, gusting to 27 mph. |
| Friday |
Sunny. Breezy and unusually hot. High 83°. UV index up to 8. Wind south-southwest around 13 mph, gusting to 30 mph. |
| Friday night |
Clear. Low 54°. Wind south-southwest around 11 mph, gusting to 27 mph. |
| Saturday |
Sunny. Breezy and unusually hot. High 85°. UV index up to 8. Wind south-southwest around 13 mph, gusting to 30 mph. |
| Saturday night |
Clear. Low 55°. Wind south-southwest around 11 mph, gusting to 27 mph. |
| Sunday |
Sunny. Breezy and unusually hot. High 86°. UV index up to 9. Wind south-southwest around 13 mph, gusting to 31 mph. |
| Sunday night |
Clear. Low 55°. Wind south-southwest around 11 mph, gusting to 27 mph. |
| Monday |
Sunny. Breezy and unusually hot. High 87°. UV index up to 9. Wind south-southwest around 13 mph, gusting to 31 mph. |
| Monday night |
Clear. Low 55°. Wind south-southwest around 11 mph, gusting to 27 mph. |
| Tuesday |
Sunny. Breezy and unusually hot. High 89°. UV index up to 9. Wind south-southwest around 13 mph, gusting to 30 mph. |
| Tuesday night |
Clear. Low 56°. Wind south-southwest around 11 mph, gusting to 27 mph. |
WXSIM forecast formatting script by Saratoga-Weather.org.
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