Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
57°F
14°C
| Humidity | 94% |
| Wind Speed | Calm |
| Barometer | 30.07 in |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 24 Aug 5:35 am CDT |
Extended Forecast for
Alton IL
Today
High: 78 °F
Sunny
Tonight
Low: 54 °F
Mostly Clear
Monday
High: 75 °F
Sunny
Monday Night
Low: 52 °F
Mostly Clear
Tuesday
High: 75 °F
Sunny
Tuesday Night
Low: 51 °F
Clear
Wednesday
High: 77 °F
Mostly Sunny
Wednesday Night
Low: 57 °F
Mostly Cloudy
Thursday
High: 79 °F
Slight Chance
Showers
Detailed Forecast
Today
Sunny, with a high near 78. Northwest wind 5 to 14 mph.
Tonight
Mostly clear, with a low around 54. Northwest wind 5 to 7 mph.
Monday
Sunny, with a high near 75. Northwest wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 52. Northwest wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 75. Calm wind becoming north around 6 mph in the morning.
Tuesday Night
Clear, with a low around 51.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Mostly cloudy, with a low around 57.
Thursday
A 20 percent chance of showers. Partly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 58.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 60.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 82.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Alton IL
38.91°N 90.13°W (Elev. 499 ft)
38.91°N 90.13°W (Elev. 499 ft)
5:41 am CDT Aug 24, 2025
6am CDT Aug 24, 2025-6pm CDT Aug 30, 2025
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