Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
84°F
29°C
| Humidity | 37% |
| Wind Speed | SW 12 mph |
| Barometer | 29.90 in |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 7 Oct 1:50 pm CDT |
Extended Forecast for
Alton IL
This Afternoon
High: 88 °F
Sunny
Tonight
Low: 57 °F
Clear
Thursday
High: 83 °F
Sunny
Thursday Night
Low: 59 °F
Clear
Friday
High: 89 °F
Sunny
Friday Night
Low: 63 °F
Clear
Saturday
High: 88 °F
Mostly Sunny
Saturday Night
Low: 58 °F
Slight Chance
RainSunday
High: 80 °F
Partly Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 88. West wind 8 to 10 mph.
Tonight
Clear, with a low around 57. Northwest wind 5 to 7 mph becoming calm after midnight.
Thursday
Sunny, with a high near 83. Calm wind becoming north around 5 mph.
Thursday Night
Clear, with a low around 59. Light and variable wind.
Friday
Sunny, with a high near 89. South wind 5 to 9 mph.
Friday Night
Clear, with a low around 63.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 58.
Sunday
Partly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 60.
Columbus Day
Mostly sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 57.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 74.
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)
2:21 pm CDT Oct 7, 2026
2pm CDT Oct 7, 2026-6pm CDT Oct 13, 2026
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