| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
||||||||||||||||||||||||||||||||||||||||||||||||
| Updated: Tuesday, 03-Mar-2026 04:00 pm | ||||||||||||||||||||||||||||||||||||||||||||||||
|
| Tonight |
Dense overcast in the evening, becoming cloudy after midnight. Patchy light fog in the evening, then light to moderate fog after midnight. A chance of rain. Low 40°. Wind north-northeast around 5 mph, gusting to 23 mph. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch. |
| Wednesday |
Cloudy in the morning, becoming dense overcast in the afternoon. Light to moderate fog in the morning. A chance of rain. High 56°. Wind north-northeast around 3 mph in the morning, becoming east-southeast in the afternoon. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch. |
| Wednesday night |
Cloudy. Patchy light fog in the evening, then light to moderate fog after midnight. Rain likely. Relatively mild. Low 48°. Wind east-southeast around 3 mph in the evening, becoming west-southwest after midnight. Chance of precipitation 60 percent. Precipitation mostly around a quarter of an inch. |
| Thursday |
Partly to mostly cloudy in the morning, becoming partly cloudy in the afternoon. Light to moderate fog in the morning. Unusually mild. High 69°. UV index up to 4. Wind west around 5 mph, gusting to 22 mph. |
| Thursday night |
Partly to mostly cloudy. Patchy light fog after midnight. A slight chance of rain in the evening, then a chance of rain after midnight. Relatively mild. Low 51°. Wind east-southeast around 4 mph in the evening, becoming south after midnight. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch. |
| Friday |
Mostly cloudy. Light to moderate fog in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon. Unusually warm. High 77°. UV index up to 5. Wind south around 9 mph, gusting to 19 mph, in the morning, becoming 12 mph, gusting to 26 mph, in the afternoon. Chance of precipitation 40 percent. Precipitation mostly less than a tenth of an inch. |
| Friday night |
Mostly cloudy in the evening, becoming cloudy after midnight. Light to moderate fog after midnight. A chance of rain in the evening, then rain likely after midnight. Mild. Low 56°. Wind south around 10 mph, gusting to 22 mph. Chance of precipitation 70 percent. Precipitation mostly between a quarter and half an inch. |
| Saturday |
Mostly cloudy in the morning, becoming sunny in the afternoon. Light to moderate fog in the morning. A chance of rain. Mild. High 62°. UV index up to 6. Wind west-northwest around 9 mph, gusting to 27 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch. |
| Saturday night |
Fair to partly cloudy in the evening, becoming fair after midnight. Patchy light fog after midnight. Low 38°. Wind west-northwest around 4 mph, gusting to 23 mph. |
| Sunday |
Partly to mostly sunny in the morning, becoming sunny in the afternoon. Patchy light fog in the morning. Mild. High 65°. UV index up to 5. Wind west-southwest around 5 mph, gusting to 19 mph, in the morning, becoming 9 mph, gusting to 24 mph, in the afternoon. |
| Sunday night |
Clear in the evening, becoming fair to partly cloudy after midnight. Low 40°. Wind south-southwest around 6 mph, gusting to 17 mph. |
| Monday |
Sunny. Breezy and unusually warm. High 75°. UV index up to 5. Wind south-southwest around 8 mph, gusting to 22 mph, in the morning, becoming 15 mph, gusting to 30 mph, in the afternoon. |
| Monday night |
Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Patchy light fog in the evening, then light to moderate fog after midnight. A chance of rain. Relatively mild. Low 50°. Wind south-southwest around 11 mph, gusting to 24 mph, in the evening, becoming 7 mph after midnight. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of 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