Current conditions at

St. Louis Regional Airport (KALN)

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

Fair

36°F

2°C

Humidity 53%
Wind Speed N 5 mph
Barometer 30.64 in
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 28 Mar 3:35 am CDT
Detailed forecast for

Macoupin County

Today
Widespread frost this morning. Sunny. Highs in the mid 50s. East winds around 5 mph, becoming south this afternoon.
Tonight
Mostly clear in the evening, then becoming partly cloudy. Not as cool with lows in the upper 30s. South winds 5 to 10 mph with gusts up to 20 mph.
Sunday
Partly sunny. Not as cool with highs in the upper 60s. South winds 10 to 15 mph with gusts up to 25 mph.
Sunday Night
Partly cloudy in the evening, then clearing. Not as cool with lows in the mid 50s. South winds 10 to 15 mph.
Monday
Sunny. Not as cool with highs in the lower 80s. South winds 15 to 20 mph with gusts up to 30 mph.
Monday Night
Partly cloudy. A slight chance of rain after midnight. Not as cool with lows in the mid 60s. Chance of rain 20 percent.
Tuesday
Partly sunny. A chance of rain with a slight chance of thunderstorms in the morning, then rain likely with a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 70 percent.
Tuesday Night
Rain with a chance of thunderstorms in the evening, then rain after midnight. Much cooler with lows in the mid 40s. Chance of rain 90 percent.
Wednesday Through Thursday Night
Mostly cloudy with a 50 percent chance of rain. Highs in the mid 50s. Lows in the upper 30s.
Friday
Partly sunny with a 40 percent chance of rain. Not as cool with highs in the mid 60s.



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252 AM CDT Sat Mar 28 2026
 
 

Additional Resources

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