| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
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| Updated: Thursday, 24-Apr-2025 04:00 pm | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Tonight |
Partly to mostly cloudy. Light to moderate fog after midnight. A chance of rain after midnight. Low 63°. Wind south-southeast around 4 mph, gusting to 23 mph. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch. |
| Friday |
Partly cloudy in the morning, becoming mostly cloudy in the afternoon. Light to moderate fog in the morning. A slight chance of rain in the morning, then a chance of rain in the afternoon. Precipitation showery or intermittent. High 75°. UV index up to 6. Wind west around 3 mph, gusting to 22 mph, in the morning, becoming 7 mph, gusting to 23 mph, in the afternoon. Chance of precipitation 40 percent. Precipitation mostly around a tenth of an inch. |
| Friday night |
Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. Low 55°. Wind north around 7 mph, gusting to 20 mph. |
| Saturday |
Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. High 65°. UV index up to 5. Wind northeast around 7 mph, gusting to 25 mph. |
| Saturday night |
Partly cloudy. Low 50°. Wind east-southeast around 5 mph, gusting to 19 mph. |
| Sunday |
Partly cloudy. A slight chance of rain in the morning, then a chance of rain in the afternoon. High 70°. UV index up to 8. Wind east-southeast around 7 mph, gusting to 26 mph. Chance of precipitation 40 percent. Precipitation mostly around a tenth of an inch. |
| Sunday night |
Fair to partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Patchy light fog after midnight. Low 54°. Wind east-southeast around 8 mph, gusting to 22 mph, in the evening, becoming south-southeast after midnight. |
| Monday |
Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Patchy light fog in the morning. Breezy and warm. High 78°. UV index up to 6. Wind south-southeast around 12 mph, gusting to 25 mph. |
| Monday night |
Partly to mostly cloudy in the evening, becoming mostly cloudy after midnight. A slight chance of rain after midnight. Precipitation showery or intermittent. Breezy. Low 63°. Wind south around 12 mph, gusting to 23 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch. |
| Tuesday |
Mostly cloudy to cloudy. Light to moderate fog in the afternoon. A chance of rain in the morning, then rain likely in the afternoon. Scattered thunderstorms likely. High 74°. UV index up to 5. Wind southwest around 10 mph, gusting to 23 mph. Chance of precipitation 70 percent. Precipitation mostly between a quarter and half an inch. |
| Tuesday night |
Moderate fog. Rain likely in the evening, then a chance of rain after midnight. Low 56°. Wind northwest around 4 mph. Chance of precipitation 70 percent. Precipitation mostly around half an inch. |
| Wednesday |
Mostly cloudy to cloudy in the morning, becoming cloudy in the afternoon. Light to moderate fog in the morning. A chance of rain. High 67°. Wind north around 2 mph in the morning, becoming south-southeast in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch. |
| Wednesday night |
Dense overcast. Patchy light fog after midnight. A chance of rain in the evening, then rain likely after midnight. Precipitation showery or intermittent. Low 59°. Wind south-southeast around 2 mph. Chance of precipitation 80 percent. Precipitation mostly around half an inch. |
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