Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89° N Lon: 90.03° W Elev: 518 ft.

Fair

68°F

20°C

Humidity 53%
Wind Speed S 8 mph
Barometer 30.21 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 27 Oct 1:50 pm CDT
Detailed forecast for

Macoupin County

This Afternoon
Mostly cloudy. Near steady temperature in the lower 70s. South winds 5 to 10 mph.
Tonight
Partly cloudy. Lows around 50. South winds around 5 mph.
Wednesday
Sunny. Highs in the upper 70s. South winds 5 to 10 mph.
Wednesday Night
Clear. Lows in the mid 50s. South winds 5 to 10 mph.
Thursday
Sunny. Highs in the lower 80s. Southwest winds 5 to 10 mph, becoming west in the afternoon.
Thursday Night
Partly cloudy. Lows in the mid 50s.
Friday
Partly sunny with a chance of showers in the morning, then mostly cloudy with a slight chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 40 percent.
Friday Night
Mostly cloudy. Lows in the mid 50s.
Saturday
Mostly cloudy. A slight chance of showers in the afternoon. Highs around 70. Chance of rain 20 percent.
Saturday Night And Sunday
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 50s. Highs in the upper 60s.
Sunday Night
Mostly cloudy with a 20 percent chance of showers. Lows in the lower 50s.
Monday
Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 70s. Chance of rain 50 percent.



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129 PM CDT Tue Oct 27 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database