Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
53°F
12°C
| Humidity | 77% |
| Wind Speed | E 3 mph |
| Barometer | 30.29 in |
| Dewpoint | 46°F (8°C) |
| Visibility | 10.00 mi |
| Last update | 24 Oct 12:35 am CDT |
Extended Forecast for
Alton ILSimilar City Names
Overnight
Low: 48 °F
Partly Cloudy
Saturday
High: 76 °F
Patchy Fog
then Mostly
SunnySaturday Night
Low: 49 °F
Partly Cloudy
Sunday
High: 78 °F
Partly Sunny
Sunday Night
Low: 52 °F
Mostly Cloudy
Monday
High: 77 °F
Partly Sunny
Monday Night
Low: 51 °F
Mostly Cloudy
Tuesday
High: 75 °F
Partly Sunny
Tuesday Night
Low: 52 °F
Mostly Cloudy
Detailed Forecast
Overnight
Partly cloudy, with a low around 48. Light east wind.
Saturday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 76. Southeast wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 49. East wind around 5 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 78. Calm wind becoming south around 5 mph.
Sunday Night
Mostly cloudy, with a low around 52. Calm wind.
Monday
Partly sunny, with a high near 77.
Monday Night
Mostly cloudy, with a low around 51.
Tuesday
Partly sunny, with a high near 75.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 71.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Alton ILSimilar City Names
38.91°N 90.16°W (Elev. 505 ft)
38.91°N 90.16°W (Elev. 505 ft)
9:47 pm CDT Oct 23, 2026
12am CDT Oct 24, 2026-6pm CDT Oct 30, 2026
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