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Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Overcast
32°F
0°C
| Humidity | 69% |
| Wind Speed | N 13 mph |
| Barometer | 30.23 in |
| Dewpoint | 23°F (-5°C) |
| Visibility | 10.00 mi |
| Wind Chill | 22°F (-6°C) |
| Last update | 3 Feb 4:50 pm CST |
Extended Forecast for
Alton IL
Tonight
Low: 20 °F
Mostly Cloudy
Wednesday
High: 30 °F
Partly Sunny
Wednesday Night
Low: 15 °F
Partly Cloudy
Thursday
High: 39 °F
Partly Sunny
Thursday Night
Low: 32 °F
Mostly Clear
Friday
High: 48 °F
Sunny
Friday Night
Low: 24 °F
Mostly Clear
Saturday
High: 41 °F
Sunny
Saturday Night
Low: 29 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly cloudy, with a low around 20. North wind 3 to 6 mph.
Wednesday
Partly sunny, with a high near 30. North wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 15. Light and variable wind.
Thursday
Partly sunny, with a high near 39. Calm wind becoming south 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 32. South wind 6 to 10 mph becoming west in the evening.
Friday
Sunny, with a high near 48.
Friday Night
Mostly clear, with a low around 24.
Saturday
Sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 46.
Sunday Night
Partly cloudy, with a low around 26.
Monday
Mostly sunny, with a high near 47.
Monday Night
Mostly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 53.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Alton IL
38.91°N 90.16°W (Elev. 505 ft)
38.91°N 90.16°W (Elev. 505 ft)
5:07 pm CST Feb 3, 2026
5pm CST Feb 3, 2026-6pm CST Feb 10, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
