Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
48°F
9°C
| Humidity | 96% |
| Wind Speed | Calm |
| Barometer | 29.95 in (1014.1 mb) |
| Dewpoint | 47°F (8°C) |
| Visibility | 10.00 mi |
| Last update | 7 Oct 1:53 am CDT |
Extended Forecast for
O'Fallon IL
Overnight
Low: 51 °F
Clear
Wednesday
High: 88 °F
Sunny
Wednesday Night
Low: 55 °F
Mostly Clear
Thursday
High: 83 °F
Sunny
Thursday Night
Low: 55 °F
Mostly Clear
Friday
High: 88 °F
Sunny
Friday Night
Low: 60 °F
Mostly Clear
Saturday
High: 87 °F
Sunny
Saturday Night
Low: 60 °F
Partly Cloudy
then Chance
Showers
Detailed Forecast
Overnight
Clear, with a low around 51. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 88. West wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 55. North wind 3 to 5 mph.
Thursday
Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 55. Light and variable wind becoming northeast around 5 mph.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 87.
Saturday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 60.
Sunday
A 30 percent chance of showers before 1pm. Mostly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 59.
Columbus Day
Mostly sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 60.
Tuesday
A 30 percent chance of showers. Sunny, with a high near 83.
Additional Forecasts and Information
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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)
1:26 am CDT Oct 7, 2026
2am CDT Oct 7, 2026-6pm CDT Oct 13, 2026
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