| WXSIM Forecast for:
O'Fallon Issued by: OFallonweather.com |
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| Updated: Thursday, 26-Feb-2026 05:00 am | ||||||||||||||||||||||||||||||||||||||||||||||||
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| Today |
Sunny. Mild. High 63°. Wind east-southeast around 3 mph, gusting to 23 mph, in the morning, becoming south-southeast in the afternoon. |
| Tonight |
Clear. Low 32°. Wind south-southeast around 2 mph in the evening, becoming southwest after midnight. |
| Friday |
Sunny. Unusually warm. High 70°. Wind south-southwest around 5 mph, gusting to 19 mph, in the morning, becoming 9 mph, gusting to 25 mph, in the afternoon. |
| Friday night |
Clear in the evening, becoming mostly clear after midnight. Low 32°. Wind southwest around 6 mph, gusting to 19 mph, in the evening, becoming north after midnight. |
| Saturday |
Partly cloudy. A chance of rain. Mild. High 61°. Wind east-northeast around 6 mph, gusting to 23 mph. Chance of precipitation 30 percent. Precipitation mostly less than a tenth of an inch. |
| Saturday night |
Partly cloudy in the evening, becoming mostly clear after midnight. Low 30°. Wind north-northeast around 9 mph, gusting to 20 mph. |
| Sunday |
Partly cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. High 46°. Wind northeast around 8 mph, gusting to 25 mph. |
| Sunday night |
Dense overcast in the evening, becoming cloudy after midnight. A chance of a mix of rain and snow in the evening, then a chance of a mix of freezing rain, sleet, rain, and snow after midnight. Low 31°. Wind chill ranging from 24 to 37. Wind east-northeast around 8 mph, gusting to 22 mph. Chance of precipitation 70 percent. Precipitation (liquid equivalent) mostly around a quarter of an inch. Snow or ice (on ground) accumulation about a quarter inch. Little if any freezing rain accumulation. |
| Monday |
Mostly cloudy to cloudy in the morning, becoming partly to mostly cloudy in the afternoon. A chance of a mix of freezing rain, rain, sleet, and snow in the morning, then a slight chance of a mix of rain and snow in the afternoon. High 47°. Wind east-northeast around 8 mph, gusting to 25 mph. Chance of precipitation 30 percent. Precipitation (liquid equivalent) mostly less than a tenth of an inch. No snow or ice (on ground) accumulation expected. Little if any freezing rain accumulation. |
| Monday night |
Mostly cloudy to cloudy in the evening, becoming cloudy after midnight. Low 37°. Wind east-northeast around 5 mph, gusting to 22 mph. |
| Tuesday |
Dense overcast. Rain likely. High 46°. Wind east around 3 mph. Chance of precipitation 80 percent. Precipitation mostly between half an inch and one inch. |
| Tuesday night |
Dense overcast. Patchy light fog after midnight. Rain likely. Low 43°. Wind northeast around 3 mph. Chance of precipitation 80 percent. Precipitation mostly between 1 and 2 inches. |
| Wednesday |
Dense overcast. Patchy light fog. Rain likely. Precipitation showery or intermittent. High 50°. Wind east around 6 mph. Chance of precipitation 80 percent. Precipitation mostly between 2 and 3 inches. |
| Wednesday night |
Dense overcast in the evening, becoming partly cloudy after midnight. Light to moderate fog in the evening, then moderate fog after midnight. Rain likely in the evening, then a chance of rain after midnight. Precipitation showery or intermittent. Relatively mild. Low 48°. Wind east-southeast around 6 mph in the evening, becoming south after midnight. Chance of precipitation 70 percent. Precipitation mostly around an inch. |
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