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Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Partly Cloudy
82°F
28°C
| Humidity | 70% |
| Wind Speed | NE 9 mph |
| Barometer | 30.17 in |
| Dewpoint | 72°F (22°C) |
| Visibility | 10.00 mi |
| Heat Index | 86°F (30°C) |
| Last update | 12 Jul 11:45 am CDT |
Extended Forecast for
Williamson IL
This Afternoon
High: 84 °F
Sunny
Tonight
Low: 65 °F
Clear
Monday
High: 86 °F
Sunny
Monday Night
Low: 65 °F
Clear
Tuesday
High: 89 °F
Sunny
Tuesday Night
Low: 70 °F
Mostly Clear
Wednesday
High: 91 °F
Sunny
Wednesday Night
Low: 71 °F
Mostly Clear
Thursday
High: 91 °F
Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 84. Northeast wind around 10 mph.
Tonight
Clear, with a low around 65. Northeast wind 3 to 8 mph.
Monday
Sunny, with a high near 86. Light northeast wind increasing to 5 to 10 mph in the morning.
Monday Night
Clear, with a low around 65. Northeast wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 89. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny, with a high near 91.
Wednesday Night
Mostly clear, with a low around 71.
Thursday
Sunny, with a high near 91.
Thursday Night
Mostly clear, with a low around 71.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 92.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Williamson IL
38.98°N 89.76°W (Elev. 597 ft)
38.98°N 89.76°W (Elev. 597 ft)
11:46 am CDT Jul 12, 2026
12pm CDT Jul 12, 2026-6pm CDT Jul 18, 2026
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