Hazardous Weather Conditions
Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
39°F
4°C
| Humidity | 96% |
| Wind Speed | Calm |
| Barometer | 30.47 in (1031.9 mb) |
| Dewpoint | 38°F (3°C) |
| Visibility | 10.00 mi |
| Last update | 17 Oct 11:53 pm CDT |
Extended Forecast for
4 Miles N O'Fallon IL
Frost Advisory October 18, 01:00am until October 18, 09:00am
Overnight
Low: 35 °F
Patchy Frost
Sunday
High: 69 °F
Patchy Frost
then SunnySunday Night
Low: 40 °F
Clear
Monday
High: 72 °F
Sunny
Monday Night
Low: 42 °F
Mostly Clear
Tuesday
High: 75 °F
Sunny
Tuesday Night
Low: 44 °F
Mostly Clear
Wednesday
High: 78 °F
Sunny
Wednesday Night
Low: 48 °F
Mostly Clear
Detailed Forecast
Overnight
Patchy frost after 4am. Otherwise, clear, with a low around 35. Calm wind.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 69. Calm wind becoming south 5 to 7 mph in the morning.
Sunday Night
Clear, with a low around 40. Southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 72. Calm wind.
Monday Night
Mostly clear, with a low around 42. Calm wind.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 51.
Saturday
Mostly sunny, with a high near 80.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles N O'Fallon IL
38.66°N 89.92°W (Elev. 551 ft)
38.66°N 89.92°W (Elev. 551 ft)
10:36 pm CDT Oct 17, 2026
12am CDT Oct 18, 2026-6pm CDT Oct 24, 2026
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