| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
||||||||||||||||||||||||||||||||||||||||||||||||
| Updated: Sunday, 29-Mar-2026 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
|
| Today |
Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. Warm. High 73°. UV index up to 6. Wind south around 6 mph, gusting to 26 mph, in the morning, becoming 10 mph, gusting to 28 mph, in the afternoon. |
| Tonight |
Partly cloudy in the evening, becoming fair after midnight. Low 45°. Wind south around 8 mph, gusting to 23 mph. |
| Monday |
Sunny. Unusually hot. High 83°. UV index up to 7. Wind south around 11 mph, gusting to 29 mph. |
| Monday night |
Partly cloudy. Low 54°. Wind south-southwest around 10 mph, gusting to 22 mph. |
| Tuesday |
Partly cloudy in the morning, becoming partly to mostly cloudy in the afternoon. A chance of rain in the afternoon. Scattered thunderstorms likely. Breezy and unusually hot. High 84°. UV index up to 5. Wind south-southwest around 13 mph, gusting to 31 mph. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch. |
| Tuesday night |
Mostly cloudy in the evening, becoming cloudy after midnight. Moderate fog. Rain likely. Scattered thundershowers possible. Low 55°. Wind west-southwest around 6 mph, gusting to 16 mph, in the evening, becoming north after midnight. Chance of precipitation 70 percent. Precipitation mostly between half an inch and one inch. |
| Wednesday |
Dense overcast. Patchy light fog in the morning, then light to moderate fog in the afternoon. Rain likely. Scattered thundershowers possible. High 56°, but temperatures falling in the afternoon. Wind northeast around 6 mph. Chance of precipitation 80 percent. Precipitation mostly between half an inch and one inch. |
| Wednesday night |
Dense overcast. Light to moderate fog. Rain likely. Scattered thundershowers possible. Low 48°, but temperatures rising after midnight. Wind northeast around 5 mph in the evening, becoming south after midnight. Chance of precipitation 80 percent. Precipitation mostly around an inch. |
| Thursday |
Dense overcast. Light to moderate fog in the morning. Rain likely in the morning, then a chance of rain in the afternoon. Scattered thunderstorms likely. High 64°. Wind south-southwest around 9 mph, gusting to 21 mph. Chance of precipitation 80 percent. Precipitation mostly around half an inch. |
| Thursday night |
Cloudy. Patchy light fog. A chance of rain. Scattered thundershowers possible. Mild. Low 59°. Wind south-southwest around 6 mph, gusting to 20 mph. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch. |
| Friday |
Cloudy in the morning, becoming mostly cloudy in the afternoon. Patchy light fog in the morning. A slight chance of rain in the morning, then a chance of rain in the afternoon. Scattered thundershowers possible. Mild. High 69°. Wind northeast around 3 mph, gusting to 18 mph, in the morning, becoming east-southeast in the afternoon. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch. |
| Friday night |
Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. Patchy light fog. A chance of rain. Scattered thundershowers possible. Mild. Low 62°. Wind southeast around 7 mph, gusting to 18 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch. |
| Saturday |
Cloudy in the morning, becoming dense overcast 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 possibly severe. Mild. High 69°. UV index up to 4. Wind south-southeast around 9 mph, gusting to 23 mph, in the morning, becoming west-southwest in the afternoon. Chance of precipitation 80 percent. Precipitation mostly around half an inch. |
| Saturday night |
Dense overcast. Patchy light fog. Rain likely in the evening, then a slight chance of rain after midnight. Scattered thunderstorms likely. Low 51°. Wind west-northwest around 10 mph, gusting to 27 mph. Chance of precipitation 70 percent. Precipitation mostly around half an inch. |
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