Hazardous Weather Conditions
Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Light Snow Fog/Mist
31°F
-1°C
| Humidity | 96% |
| Wind Speed | SE 10 mph |
| Barometer | 30.25 in (1024.5 mb) |
| Dewpoint | 30°F (-1°C) |
| Visibility | 1.00 mi |
| Wind Chill | 22°F (-6°C) |
| Last update | 29 Nov 5:53 am CST |
Extended Forecast for
O'Fallon IL
Winter Weather Advisory November 29, 06:39am until November 30, 12:00am
NOW until 12:00am Sun
Winter Weather Advisory
Today
High: 39 °F
Wintry Mix
Tonight
Low: 25 °F
Breezy.
Chance Rain
then CloudySunday
High: 29 °F
Mostly Cloudy
Sunday Night
Low: 18 °F
Mostly Cloudy
Monday
High: 31 °F
Mostly Cloudy
then Slight
Chance SnowMonday Night
Low: 22 °F
Snow Likely
Tuesday
High: 30 °F
Partly Sunny
Tuesday Night
Low: 17 °F
Partly Cloudy
Detailed Forecast
Today
Rain and snow, possibly mixed with sleet before 1pm, then rain, possibly mixed with sleet between 1pm and 2pm, then rain after 2pm. High near 39. Southeast wind 13 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. Total daytime snow and sleet accumulation of 2 to 4 inches possible.
Tonight
A 50 percent chance of rain, mainly before 9pm. Cloudy, with a low around 25. Breezy, with a south wind 17 to 20 mph becoming west after midnight. Winds could gust as high as 33 mph.
Sunday
Mostly cloudy, with a high near 29. Northwest wind 10 to 18 mph, with gusts as high as 31 mph.
Sunday Night
Mostly cloudy, with a low around 18. Northwest wind 5 to 9 mph becoming calm in the evening.
Monday
A 20 percent chance of snow after noon. Cloudy, with a high near 31. Calm wind becoming east around 5 mph.
Monday Night
Snow likely. Cloudy, with a low around 22. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Tuesday
Partly sunny, with a high near 30.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 18.
Thursday
Partly sunny, with a high near 27.
Thursday Night
Mostly cloudy, with a low around 19.
Friday
A slight chance of rain and snow. Partly sunny, with a high near 37. Chance of precipitation is 20%.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
O'Fallon IL
38.59°N 89.92°W (Elev. 551 ft)
38.59°N 89.92°W (Elev. 551 ft)
6:16 am CST Nov 29, 2025
6am CST Nov 29, 2025-6pm CST Dec 5, 2025
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
