Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
55°F
13°C
| Humidity | 82% |
| Wind Speed | Calm |
| Barometer | 30.17 in |
| Dewpoint | 50°F (10°C) |
| Visibility | 10.00 mi |
| Last update | 3 Oct 9:45 pm CDT |
Extended Forecast for
Alton IL
Tonight
Low: 48 °F
Decreasing
CloudsSunday
High: 79 °F
Sunny
Sunday Night
Low: 50 °F
Mostly Clear
Monday
High: 75 °F
Sunny
Monday Night
Low: 48 °F
Clear
Tuesday
High: 78 °F
Sunny
Tuesday Night
Low: 53 °F
Clear
Wednesday
High: 84 °F
Sunny
Wednesday Night
Low: 53 °F
Clear
Detailed Forecast
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 48. Calm wind.
Sunday
Sunny, with a high near 79. Calm wind becoming north 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 50. North wind 5 to 7 mph.
Monday
Sunny, with a high near 75. Northeast wind around 6 mph.
Monday Night
Clear, with a low around 48. Northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Clear, with a low around 53.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Clear, with a low around 53.
Thursday
Sunny, with a high near 83.
Thursday Night
Clear, with a low around 55.
Friday
Sunny, with a high near 85.
Friday Night
Clear, with a low around 57.
Saturday
Sunny, with a high near 88.
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)
8:51 pm CDT Oct 3, 2026
9pm CDT Oct 3, 2026-6pm CDT Oct 10, 2026
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