Current conditions at

St. Louis Regional Airport (KALN)

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

Fair

66°F

19°C

Humidity 64%
Wind Speed E 5 mph
Barometer 29.96 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 29 Sep 10:55 pm CDT
Detailed forecast for

Macoupin County

Tonight
Mostly cloudy. Not as cool with lows in the mid 60s. Southeast winds 5 to 10 mph.
Wednesday
Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 80s. South winds 5 to 10 mph.
Wednesday Night
Mostly cloudy. A slight chance of showers after midnight. Lows around 70. South winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 20 percent.
Thursday
Mostly cloudy with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Southwest winds 5 to 10 mph. Chance of rain 50 percent.
Thursday Night
Showers with a slight chance of thunderstorms. Lows in the mid 60s. West winds 5 to 10 mph. Chance of rain 90 percent.
Friday
Mostly cloudy with a chance of showers in the morning, then partly sunny with a slight chance of showers in the afternoon. Cooler with highs in the lower 70s. Chance of rain 50 percent.
Friday Night
Partly cloudy. Cooler with lows in the lower 50s.
Saturday And Saturday Night
Partly cloudy. A 20 percent chance of showers. Highs in the upper 60s. Lows in the lower 50s.
Sunday Through Tuesday
Mostly clear. Highs in the upper 60s. Lows in the upper 40s.



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943 PM CDT Tue Sep 29 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database