Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
54°F
12°C
| Humidity | 44% |
| Wind Speed | E 9 mph |
| Barometer | 30.31 in |
| Dewpoint | 32°F (0°C) |
| Visibility | 10.00 mi |
| Wind Chill | 51°F (11°C) |
| Last update | 7 Apr 4:50 pm CDT |
Extended Forecast for
Alton IL
Tonight
Low: 41 °F
Partly Cloudy
Wednesday
High: 74 °F
Mostly Sunny
Wednesday Night
Low: 55 °F
Partly Cloudy
Thursday
High: 78 °F
Mostly Sunny
Thursday Night
Low: 59 °F
Mostly Cloudy
then Chance
ShowersFriday
High: 69 °F
Showers
LikelyFriday Night
Low: 52 °F
Chance
ShowersSaturday
High: 73 °F
Slight Chance
ShowersSaturday Night
Low: 60 °F
Partly Cloudy
Detailed Forecast
Tonight
Partly cloudy, with a low around 41. East wind 8 to 11 mph.
Wednesday
Mostly sunny, with a high near 74. Southeast wind 8 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 55. South wind 8 to 14 mph, with gusts as high as 22 mph.
Thursday
Mostly sunny, with a high near 78. Southwest wind 7 to 10 mph.
Thursday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 59. South wind around 9 mph. Chance of precipitation is 30%.
Friday
Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.
Saturday
A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 73.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. Breezy.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 65. Chance of precipitation is 70%.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 79. Chance of precipitation is 60%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Alton IL
38.91°N 90.19°W (Elev. 538 ft)
38.91°N 90.19°W (Elev. 538 ft)
5:21 pm CDT Apr 7, 2026
5pm CDT Apr 7, 2026-6pm CDT Apr 14, 2026
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