Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
63°F
17°C
| Humidity | 90% |
| Wind Speed | E 3 mph |
| Barometer | 30.07 in |
| Dewpoint | 60°F (16°C) |
| Visibility | 10.00 mi |
| Last update | 25 Aug 2:35 am CDT |
Extended Forecast for
Alton ILSimilar City Names
Overnight
Low: 64 °F
Partly Cloudy
Tuesday
High: 86 °F
Mostly Sunny
Tuesday Night
Low: 68 °F
Partly Cloudy
Wednesday
High: 90 °F
Mostly Sunny
Wednesday Night
Low: 68 °F
Isolated
T-stormsThursday
High: 86 °F
Sunny
Thursday Night
Low: 65 °F
Mostly Clear
Friday
High: 86 °F
Sunny
Friday Night
Low: 65 °F
Mostly Clear
Detailed Forecast
Overnight
Partly cloudy, with a low around 64. Light east wind.
Tuesday
Mostly sunny, with a high near 86. East wind around 6 mph.
Tuesday Night
Partly cloudy, with a low around 68. East wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 90. Calm wind becoming west 5 to 8 mph in the morning.
Wednesday Night
Isolated showers and thunderstorms before 1am. Partly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 65.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 75.
Monday
Mostly sunny, with a high near 95.
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)
1:26 am CDT Aug 25, 2026
2am CDT Aug 25, 2026-6pm CDT Aug 31, 2026
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