Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
75°F
24°C
| Humidity | 50% |
| Wind Speed | SE 7 mph |
| Barometer | 30.06 in |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 4 Oct 6:50 pm CDT |
Extended Forecast for
Alton IL
Tonight
Low: 60 °F
Clear
Sunday
High: 88 °F
Sunny
Sunday Night
Low: 64 °F
Mostly Clear
Monday
High: 87 °F
Sunny then
Chance
T-stormsMonday Night
Low: 64 °F
Chance
ShowersTuesday
High: 78 °F
Chance
Showers then
Chance
T-stormsTuesday Night
Low: 55 °F
Partly Cloudy
Wednesday
High: 75 °F
Sunny
Wednesday Night
Low: 51 °F
Mostly Clear
Detailed Forecast
Tonight
Clear, with a low around 60. Southeast wind 5 to 8 mph.
Sunday
Sunny, with a high near 88. South wind 7 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 64. South wind 5 to 8 mph.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 87. South wind 3 to 7 mph.
Monday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64. South wind 3 to 6 mph.
Tuesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 81.
Friday Night
Partly cloudy, with a low around 55.
Saturday
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 pm CDT Oct 4, 2025
7pm CDT Oct 4, 2025-6pm CDT Oct 11, 2025
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