Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Partly Cloudy
68°F
20°C
| Humidity | 72% |
| Wind Speed | Calm |
| Barometer | 30.05 in |
| Dewpoint | 59°F (15°C) |
| Visibility | 10.00 mi |
| Last update | 23 Aug 11:35 pm CDT |
Extended Forecast for
Alton IL
Tonight
Low: 59 °F
Clear
Sunday
High: 78 °F
Sunny
Sunday Night
Low: 54 °F
Mostly Clear
Monday
High: 77 °F
Mostly Sunny
Monday Night
Low: 52 °F
Mostly Clear
Tuesday
High: 77 °F
Sunny
Tuesday Night
Low: 51 °F
Mostly Clear
Wednesday
High: 79 °F
Sunny
Wednesday Night
Low: 57 °F
Partly Cloudy
Detailed Forecast
Tonight
Clear, with a low around 59. North wind 5 to 8 mph.
Sunday
Sunny, with a high near 78. Northwest wind 5 to 11 mph.
Sunday Night
Mostly clear, with a low around 54. Northwest wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 77. Light northwest wind increasing to 5 to 9 mph in the morning.
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 77.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 59.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 82.
Friday Night
Partly cloudy, with a low around 62.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 81.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Alton IL
38.88°N 90.16°W (Elev. 466 ft)
38.88°N 90.16°W (Elev. 466 ft)
8:46 pm CDT Aug 23, 2025
11pm CDT Aug 23, 2025-6pm CDT Aug 30, 2025
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