| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
||||||||||||||||||||||||||||||||||||||||||||||||
| Updated: Saturday, 07-Mar-2026 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
|
| Today |
Dense overcast in the morning, becoming mostly 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 thundershowers possible. Mild. High 64°. Wind west-southwest around 9 mph, gusting to 29 mph. Chance of precipitation 50 percent. Precipitation mostly less than a quarter of an inch. |
| Tonight |
Partly cloudy in the evening, becoming fair after midnight. Low 39°. Wind west-northwest around 6 mph, gusting to 26 mph. |
| Sunday |
Mostly sunny. Mild. High 67°. UV index up to 5. Wind west-southwest around 6 mph, gusting to 24 mph, in the morning, becoming 10 mph, gusting to 26 mph, in the afternoon. |
| Sunday night |
Fair in the evening, becoming clear after midnight. Low 41°. Wind west-southwest around 7 mph, gusting to 22 mph. |
| Monday |
Sunny. Unusually warm. High 77°. UV index up to 4. Wind west-southwest around 8 mph, gusting to 25 mph, in the morning, becoming 12 mph, gusting to 29 mph, in the afternoon. |
| Monday night |
Fair in the evening, becoming partly cloudy after midnight. Patchy light fog after midnight. Relatively mild. Low 50°. Wind south-southwest around 7 mph, gusting to 19 mph. |
| Tuesday |
Mostly cloudy. Patchy light fog in the morning. A slight chance of rain in the afternoon. Scattered thunderstorms likely. Unusually warm. High 79°. UV index up to 4. Wind south-southwest around 7 mph, gusting to 21 mph, in the morning, becoming 14 mph, gusting to 29 mph, in the afternoon. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch. |
| Tuesday night |
Cloudy. Patchy light fog. A slight chance of rain in the evening, then a chance of rain after midnight. Scattered thunderstorms likely. Breezy and unusually warm. Low 63°. Wind south-southwest around 13 mph, gusting to 25 mph. Chance of precipitation 50 percent. Precipitation mostly less than a tenth of an inch. |
| Wednesday |
Dense overcast in the morning, becoming mostly cloudy to cloudy in the afternoon. Patchy light fog. Rain likely in the morning, then a chance of rain in the afternoon. Thunderstorms very likely, some possibly severe. Breezy and mild. High 64°, but temperatures falling in the afternoon. Wind west around 13 mph, gusting to 31 mph. Chance of precipitation 80 percent. Precipitation mostly between half an inch and one inch. |
| Wednesday night |
Partly cloudy in the evening, becoming clear after midnight. Patchy light fog in the evening, then moderate fog after midnight. Low 37°. Wind west-northwest around 12 mph, gusting to 29 mph, in the evening, becoming 7 mph, gusting to 23 mph, after midnight. |
| Thursday |
Sunny. Moderate fog in the morning, then patchy light fog in the afternoon. High 53°. Wind west around 8 mph, gusting to 20 mph, in the morning, becoming 11 mph, gusting to 23 mph, in the afternoon. |
| Thursday night |
Partly cloudy in the evening, becoming fair after midnight. Breezy. Low 38°. Wind south-southwest around 10 mph, gusting to 20 mph, in the evening, becoming 14 mph, gusting to 21 mph, after midnight. |
| Friday |
Mostly sunny in the morning, becoming partly to mostly cloudy in the afternoon. Windy and mild. High 64°. UV index up to 5. Wind southwest around 16 mph, gusting to 32 mph. |
| Friday night |
Mostly cloudy to cloudy. Low 42°. Wind west around 5 mph, gusting to 19 mph, in the evening, becoming north after midnight. |
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