| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
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| Updated: Thursday, 24-Apr-2025 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Today |
Mostly sunny in the morning, becoming partly to mostly sunny in the afternoon. Unusually hot. High 84°. UV index up to 9. Wind south-southeast around 3 mph, gusting to 23 mph. |
| Tonight |
Partly to mostly cloudy. Low 63°. Wind east-southeast around 4 mph, gusting to 20 mph, in the evening, becoming south after midnight. |
| Friday |
Mostly cloudy to cloudy in the morning, becoming mostly cloudy in the afternoon. Light to moderate fog in the afternoon. Rain likely. Scattered thunderstorms likely. High 75°. UV index up to 6. Wind south around 5 mph, gusting to 23 mph, in the morning, becoming west in the afternoon. Chance of precipitation 60 percent. Precipitation mostly around a quarter of an inch. |
| Friday night |
Mostly cloudy in the evening, becoming cloudy after midnight. Moderate fog in the evening, then light to moderate fog after midnight. A chance of rain in the evening, then a slight chance of rain after midnight. Low 57°. Wind north-northwest around 5 mph, gusting to 18 mph, in the evening, becoming 8 mph, gusting to 21 mph, after midnight. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch. |
| Saturday |
Mostly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Patchy light fog in the morning. High 71°. UV index up to 9. Wind north-northeast around 7 mph, gusting to 26 mph. |
| Saturday night |
Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Low 50°. Wind east-northeast around 5 mph, gusting to 22 mph. |
| Sunday |
Partly to mostly sunny. High 74°. UV index up to 9. Wind east-southeast around 8 mph, gusting to 27 mph. |
| Sunday night |
Fair to partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 52°. Wind southeast around 8 mph, gusting to 23 mph. |
| Monday |
Mostly cloudy. Breezy and warm. High 83°. UV index up to 7. Wind south around 10 mph, gusting to 26 mph, in the morning, becoming 13 mph, gusting to 29 mph, in the afternoon. |
| Monday night |
Mostly cloudy in the evening, becoming partly cloudy after midnight. A chance of rain after midnight. Scattered thundershowers possible. Breezy and mild. Low 64°. Wind south around 11 mph, gusting to 25 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch. |
| Tuesday |
Mostly cloudy in the morning, becoming cloudy in the afternoon. Patchy light fog in the morning, then light to moderate fog in the afternoon. A chance of rain in the morning, then rain likely in the afternoon. Thunderstorms very likely, some severe. Warm. High 76°. UV index up to 5. Wind south around 10 mph, gusting to 26 mph, in the morning, becoming west-southwest in the afternoon. Chance of precipitation 80 percent. Precipitation mostly between half an inch and one inch. |
| Tuesday night |
Cloudy in the evening, becoming mostly cloudy after midnight. Light to moderate fog. Rain likely in the evening, then a slight chance of rain after midnight. Scattered thunderstorms likely. Low 59°. Wind west-southwest around 5 mph, gusting to 19 mph, in the evening, becoming north after midnight. Chance of precipitation 70 percent. Precipitation mostly between a quarter and half an inch. |
| Wednesday |
Mostly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Patchy light fog in the morning. High 71°. UV index up to 5. Wind north around 3 mph, gusting to 21 mph. |
| Wednesday night |
Mostly cloudy to cloudy in the evening, becoming mostly cloudy after midnight. Low 57°. Wind east-northeast around 3 mph in the evening, becoming east-southeast after midnight. |
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