| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
||||||||||||||||||||||||||||||||||||||||||||||||
| Updated: Wednesday, 13-May-2026 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
|
| Today |
Sunny. High 77°. UV index up to 7. Wind west-northwest around 9 mph, gusting to 29 mph. |
| Tonight |
Clear. Cool. Low 49°. Wind north around 4 mph, gusting to 25 mph, in the evening, becoming east after midnight. |
| Thursday |
Sunny in the morning, becoming mostly sunny in the afternoon. High 78°. UV index up to 8. Wind southeast around 4 mph, gusting to 25 mph. |
| Thursday night |
Partly to mostly cloudy in the evening, becoming partly cloudy after midnight. A chance of rain after midnight. Cool. Low 49°. Wind south-southeast around 8 mph, gusting to 22 mph. Chance of precipitation 50 percent. Precipitation mostly around a quarter of an inch. |
| Friday |
Partly to mostly cloudy. Patchy light fog in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon. Precipitation showery or intermittent. High 79°. UV index up to 6. Wind south-southeast around 9 mph, gusting to 23 mph. Chance of precipitation 60 percent. Precipitation mostly around a quarter of an inch. |
| Friday night |
Fair to partly cloudy. Low 58°. Wind south around 7 mph, gusting to 21 mph. |
| Saturday |
Partly cloudy. Light to moderate fog in the morning. Rain likely in the morning, then a slight chance of rain in the afternoon. Scattered thundershowers possible. Warm. High 83°. UV index up to 7. Wind south-southwest around 6 mph, gusting to 23 mph. Chance of precipitation 60 percent. Precipitation mostly between a quarter and half an inch. |
| Saturday night |
Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Patchy light fog in the evening, then moderate fog after midnight. A slight chance of rain in the evening, then a chance of rain after midnight. Scattered thundershowers possible. Low 63°. Wind south-southeast around 5 mph, gusting to 20 mph. Chance of precipitation 60 percent. Precipitation mostly around a quarter of an inch. |
| Sunday |
Partly to mostly cloudy in the morning, becoming sunny in the afternoon. Moderate fog in the morning. Hot. High 86°. UV index up to 9. Wind south around 7 mph, gusting to 23 mph, in the morning, becoming 11 mph, gusting to 27 mph, in the afternoon. |
| Sunday night |
Clear in the evening, becoming partly cloudy after midnight. Low 67°. Wind south around 10 mph, gusting to 24 mph. |
| Monday |
Mostly cloudy to cloudy in the morning, becoming partly to mostly cloudy in the afternoon. A chance of rain. Scattered thunderstorms likely. Breezy and warm. High 82°. UV index up to 7. Wind south around 12 mph, gusting to 27 mph. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch. |
| Monday night |
Partly cloudy in the evening, becoming dense overcast after midnight. Patchy light fog in the evening, then light to moderate fog after midnight. A slight chance of rain in the evening, then rain likely after midnight. Thunderstorms very likely, some possibly severe. Low 67°. Wind south-southwest around 13 mph, gusting to 25 mph, in the evening, becoming 9 mph, gusting to 21 mph, after midnight. Chance of precipitation 80 percent. Precipitation mostly around half an inch. |
| Tuesday |
Cloudy. Light to moderate fog in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon. Scattered thundershowers possible. High 71°. UV index up to 4. Wind west-southwest around 7 mph, gusting to 24 mph, in the morning, becoming west-northwest in the afternoon. Chance of precipitation 60 percent. Precipitation mostly around a quarter of an inch. |
| Tuesday night |
Mostly cloudy in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 58°. Wind north-northwest around 3 mph, gusting to 20 mph. |
WXSIM forecast formatting script by Saratoga-Weather.org.
Powered by Davis Vantage Pro2
and
CumulusMX
v 4.6.4 (b4128)
MXUI Template v 2.2.6 by
Silver Acorn
Valid HTML5