Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Overcast
27°F
-3°C
| Humidity | 80% |
| Wind Speed | S 7 mph |
| Barometer | 30.12 in |
| Dewpoint | 21°F (-6°C) |
| Visibility | 10.00 mi |
| Wind Chill | 19°F (-7°C) |
| Last update | 2 Dec 8:50 pm CST |
Extended Forecast for
Alton IL
Tonight
Low: 18 °F
Partly Cloudy
Wednesday
High: 38 °F
Increasing
CloudsWednesday Night
Low: 13 °F
Slight Chance
SnowThursday
High: 22 °F
Mostly Sunny
Thursday Night
Low: 10 °F
Partly Cloudy
Friday
High: 36 °F
Mostly Sunny
Friday Night
Low: 21 °F
Partly Cloudy
Saturday
High: 36 °F
Partly Sunny
Saturday Night
Low: 24 °F
Mostly Cloudy
Detailed Forecast
Tonight
Partly cloudy, with a low around 18. South wind around 6 mph.
Wednesday
Increasing clouds, with a high near 38. South wind around 6 mph becoming northwest in the afternoon.
Wednesday Night
A 20 percent chance of snow after 9pm. Mostly cloudy, with a low around 13. North wind 6 to 10 mph.
Thursday
Mostly sunny, with a high near 22. North wind 3 to 8 mph.
Thursday Night
Partly cloudy, with a low around 10. Light and variable wind.
Friday
Mostly sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 36.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
A slight chance of snow before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 33. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 18.
Monday
Partly sunny, with a high near 33.
Monday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 26.
Tuesday
Partly sunny, with a high near 40.
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)
8:51 pm CST Dec 2, 2025
9pm CST Dec 2, 2025-6pm CST Dec 9, 2025
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