Current conditions at
St. Louis Downtown Airport (KCPS)
Lat: 38.56°NLon: 90.15°WElev: 410ft.
Fair
66°F
19°C
| Humidity | 36% |
| Wind Speed | SE 7 mph |
| Barometer | 30.39 in (1029.0 mb) |
| Dewpoint | 38°F (3°C) |
| Visibility | 10.00 mi |
| Last update | 18 Oct 2:53 pm CDT |
Extended Forecast for
Collinsville IL
Tonight
Low: 41 °F
Clear
Monday
High: 72 °F
Sunny
Monday Night
Low: 44 °F
Partly Cloudy
Tuesday
High: 75 °F
Mostly Sunny
Tuesday Night
Low: 47 °F
Mostly Clear
Wednesday
High: 77 °F
Sunny
Wednesday Night
Low: 48 °F
Clear
Thursday
High: 77 °F
Sunny
Thursday Night
Low: 50 °F
Clear
Detailed Forecast
Tonight
Clear, with a low around 41. Southeast wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 72. Light southeast wind.
Monday Night
Partly cloudy, with a low around 44. Light and variable wind.
Tuesday
Mostly sunny, with a high near 75. Calm wind.
Tuesday Night
Mostly clear, with a low around 47. Calm wind.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Clear, with a low around 48.
Thursday
Sunny, with a high near 77.
Thursday Night
Clear, with a low around 50.
Friday
Sunny, with a high near 77.
Friday Night
Mostly clear, with a low around 50.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 80.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Collinsville IL
38.68°N 89.97°W (Elev. 502 ft)
38.68°N 89.97°W (Elev. 502 ft)
2:56 pm CDT Oct 18, 2026
3pm CDT Oct 18, 2026-6pm CDT Oct 25, 2026
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