Hazardous Weather Conditions
Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Overcast
75°F
24°C
| Humidity | 65% |
| Wind Speed | NE 12 mph |
| Barometer | 30.16 in |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 31 Jul 6:50 pm CDT |
Extended Forecast for
Alton IL
Tonight
Low: 61 °F
Haze
Friday
High: 81 °F
Sunny
Friday Night
Low: 59 °F
Mostly Clear
Saturday
High: 79 °F
Sunny
Saturday Night
Low: 59 °F
Mostly Clear
Sunday
High: 81 °F
Sunny
Sunday Night
Low: 65 °F
Partly Cloudy
Monday
High: 83 °F
Partly Sunny
then Slight
Chance
T-stormsMonday Night
Low: 67 °F
Slight Chance
T-storms
Detailed Forecast
Tonight
Widespread haze after 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 61. Northeast wind 7 to 10 mph.
Friday
Sunny, with a high near 81. Northeast wind 8 to 11 mph.
Friday Night
Mostly clear, with a low around 59. Northeast wind 6 to 9 mph.
Saturday
Sunny, with a high near 79. Northeast wind 6 to 8 mph.
Saturday Night
Mostly clear, with a low around 59. Northeast wind 3 to 6 mph.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 65.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 69.
Thursday
Mostly sunny, with a high near 89.
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)
5:11 pm CDT Jul 31, 2025
7pm CDT Jul 31, 2025-6pm CDT Aug 7, 2025
Additional Resources
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Hourly Weather Forecast
