Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
64°F
18°C
| Humidity | 92% |
| Wind Speed | N 5 mph |
| Barometer | 30.06 in |
| Dewpoint | 61°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 21 Aug 6:15 am CDT |
Extended Forecast for
Alton IL
Today
High: 81 °F
Mostly Sunny
Tonight
Low: 63 °F
Mostly Clear
then Patchy
FogFriday
High: 85 °F
Patchy Fog
then SunnyFriday Night
Low: 66 °F
Mostly Clear
Saturday
High: 87 °F
Mostly Sunny
Saturday Night
Low: 60 °F
Partly Cloudy
Sunday
High: 79 °F
Sunny
Sunday Night
Low: 58 °F
Mostly Clear
Monday
High: 76 °F
Mostly Sunny
Detailed Forecast
Today
Mostly sunny, with a high near 81. Northeast wind 5 to 8 mph.
Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 63. Northeast wind 3 to 6 mph.
Friday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 85. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 66. Light and variable wind.
Saturday
Mostly sunny, with a high near 87. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 58.
Monday
Mostly sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Sunny, with a high near 77.
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)
4:16 am CDT Aug 21, 2025
6am CDT Aug 21, 2025-6pm CDT Aug 27, 2025
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