| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
||||||||||||||||||||||||||||||||||||||||||||||||
| Updated: Thursday, 23-Apr-2026 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
|
| Today |
Partly to mostly cloudy in the morning, becoming partly cloudy in the afternoon. Warm. High 83°. UV index up to 6. Wind south-southwest around 7 mph, gusting to 28 mph, in the morning, becoming 12 mph, gusting to 29 mph, in the afternoon. |
| Tonight |
Partly cloudy in the evening, becoming cloudy after midnight. Patchy light fog after midnight. A slight chance of rain in the evening, then a chance of rain after midnight. Thunderstorms very likely, some severe. Low 62°. Wind south around 12 mph, gusting to 27 mph, in the evening, becoming 8 mph, gusting to 19 mph, after midnight. Chance of precipitation 60 percent. Precipitation mostly less than a quarter of an inch. |
| Friday |
Cloudy in the morning, becoming partly cloudy in the afternoon. Patchy light fog in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon. Scattered thunderstorms likely, some possibly severe. Warm. High 76°. UV index up to 6. Wind west-northwest around 5 mph, gusting to 24 mph. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch. |
| Friday night |
Fair in the evening, becoming clear after midnight. Patchy light fog after midnight. Low 51°. Wind north-northwest around 4 mph, gusting to 20 mph. |
| Saturday |
Sunny in the morning, becoming partly to mostly sunny in the afternoon. Patchy light fog in the morning. Warm. High 77°. UV index up to 7. Wind northeast around 5 mph, gusting to 23 mph. |
| Saturday night |
Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Patchy light fog after midnight. Low 52°. Wind east-northeast around 5 mph, gusting to 19 mph. |
| Sunday |
Mostly sunny in the morning, becoming partly cloudy in the afternoon. Patchy light fog in the morning. Warm. High 77°. UV index up to 7. Wind east-southeast around 7 mph, gusting to 24 mph, in the morning, becoming 11 mph, gusting to 27 mph, in the afternoon. |
| Sunday night |
Partly to mostly cloudy. Patchy light fog. Rain likely. Scattered thundershowers possible. Low 54°. Wind east-southeast around 10 mph, gusting to 23 mph. Chance of precipitation 60 percent. Precipitation mostly between a quarter and half an inch. |
| Monday |
Mostly cloudy in the morning, becoming partly to mostly sunny in the afternoon. Patchy light fog in the morning. A chance of rain. Scattered thunderstorms likely. Breezy and warm. High 82°. UV index up to 7. Wind southeast around 13 mph, gusting to 29 mph, in the morning, becoming south-southwest in the afternoon. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch. |
| Monday night |
Fair in the evening, becoming fair to partly cloudy after midnight. Patchy light fog after midnight. Low 57°. Wind southwest around 8 mph, gusting to 25 mph, in the evening, becoming west-northwest after midnight. |
| Tuesday |
Partly to mostly sunny in the morning, becoming partly cloudy in the afternoon. Patchy light fog in the morning. High 75°. UV index up to 7. Wind west-northwest around 6 mph, gusting to 26 mph. |
| Tuesday night |
Partly cloudy in the evening, becoming partly to mostly cloudy after midnight. Low 53°. Wind north around 2 mph, gusting to 20 mph. |
| Wednesday |
Cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. High 65°. UV index up to 5. Wind north-northwest around 5 mph, gusting to 23 mph. |
| Wednesday night |
Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Low 51°. 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