Current conditions at
St. Louis Regional Airport (KALN)
Lat: 38.89°NLon: 90.03°WElev: 518ft.
Fair
84°F
29°C
| Humidity | 40% |
| Wind Speed | W 5 mph |
| Barometer | 29.89 in |
| Dewpoint | 57°F (14°C) |
| Visibility | 10.00 mi |
| Heat Index | 83°F (28°C) |
| Last update | 7 Oct 5:45 pm CDT |
Extended Forecast for
Carlinville IL
Tonight
Low: 55 °F
Clear
Thursday
High: 82 °F
Sunny
Thursday Night
Low: 56 °F
Mostly Clear
Friday
High: 87 °F
Becoming
SunnyFriday Night
Low: 61 °F
Clear
Saturday
High: 88 °F
Mostly Sunny
Saturday Night
Low: 56 °F
Chance Rain
Sunday
High: 79 °F
Partly Sunny
Sunday Night
Low: 57 °F
Partly Cloudy
Detailed Forecast
Tonight
Clear, with a low around 55. Northwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 82. Calm wind.
Thursday Night
Mostly clear, with a low around 56. Light and variable wind.
Friday
Partly sunny, then gradually becoming sunny, with a high near 87. Light southeast wind becoming south 5 to 9 mph in the morning.
Friday Night
Clear, with a low around 61. South wind 5 to 7 mph.
Saturday
Mostly sunny, with a high near 88.
Saturday Night
A 30 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 56.
Sunday
Partly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 57.
Columbus Day
Mostly sunny, with a high near 89.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 71.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Carlinville IL
39.27°N 89.89°W (Elev. 614 ft)
39.27°N 89.89°W (Elev. 614 ft)
5:40 pm CDT Oct 7, 2026
6pm CDT Oct 7, 2026-6pm CDT Oct 14, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
