Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Overcast and Breezy
41°F
5°C
| Humidity | 70% |
| Wind Speed | NW 23 G 32 mph |
| Barometer | 30.09 in (1018.9 mb) |
| Dewpoint | 32°F (0°C) |
| Visibility | 10.00 mi |
| Wind Chill | 31°F (-1°C) |
| Last update | 9 Nov 5:53 am CST |
Extended Forecast for
O'Fallon IL
Today
High: 39 °F⇓
Breezy.
Chance
Sprinkles/Flurries
then Chance
FlurriesTonight

Low: 25 °F
Chance
FlurriesMonday

High: 40 °F
Sunny
Monday Night

Low: 25 °F
Increasing
CloudsVeterans Day

High: 53 °F
Partly Sunny
Tuesday Night

Low: 41 °F
Mostly Clear
Wednesday

High: 64 °F
Sunny
Wednesday Night

Low: 36 °F
Mostly Clear
Thursday

High: 63 °F
Mostly Sunny
Detailed Forecast
Today
A chance of sprinkles and flurries before 7am, then a chance of flurries. Cloudy, then gradually becoming mostly sunny, with a temperature falling to around 34 by 5pm. Breezy, with a northwest wind 20 to 22 mph, with gusts as high as 32 mph.
Tonight
A chance of flurries between midnight and 1am. Partly cloudy, with a low around 25. Northwest wind 13 to 17 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 40. Northwest wind 10 to 18 mph, with gusts as high as 28 mph.
Monday Night
Increasing clouds, with a low around 25. Northwest wind 5 to 8 mph becoming light and variable.
Veterans Day
Partly sunny, with a high near 53. South wind 8 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 36.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 70.
Friday Night
Partly cloudy, with a low around 55.
Saturday
Mostly sunny, with a high near 74.
Additional Forecasts and Information
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ABOUT 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)
6:01 am CST Nov 9, 2025
6am CST Nov 9, 2025-6pm CST Nov 15, 2025


