Current conditions at

St. Louis Regional Airport (KALN)

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

Fog/Mist

59°F

15°C

Humidity 82%
Wind Speed SE 7 mph
Barometer 30.10 in
Dewpoint 54°F (12°C)
Visibility 4.00 mi
Last update 24 Dec 1:45 pm CST
Detailed forecast for

Macoupin County

This Afternoon
Mostly cloudy. Highs in the lower 60s. Southeast winds 5 to 10 mph with gusts up to 20 mph.
Tonight
Mostly cloudy. Patchy dense fog in the evening, then widespread dense fog after midnight. Lows in the upper 40s. South winds around 5 mph, becoming northwest after midnight.
Christmas Day
Widespread dense fog in the morning. Mostly cloudy. Highs in the lower 60s. Northeast winds around 5 mph.
Thursday Night
Mostly cloudy. Near steady temperature in the mid 50s. Southeast winds 5 to 10 mph, becoming south after midnight.
Friday
Mostly sunny. Highs in the mid 60s. Southwest winds 5 to 10 mph, becoming west in the afternoon.
Friday Night
Partly cloudy in the evening, then becoming mostly cloudy. Cooler with lows in the mid 40s.
Saturday And Saturday Night
Mostly cloudy. Highs in the mid 60s. Lows in the lower 50s.
Sunday
A slight chance of thunderstorms in the morning. Mostly cloudy with a chance of rain. Highs in the mid 50s. Temperature falling into the mid 40s in the afternoon. Chance of rain 50 percent.
Sunday Night
Mostly cloudy with a slight chance of rain and snow in the evening, then partly cloudy after midnight. Much cooler with lows 15 to 20. Chance of precipitation 20 percent. Wind chill values as low as zero after midnight.
Monday And Monday Night
Mostly clear. Highs in the upper 20s. Lows 15 to 20. Wind chill values as low as zero.
Tuesday
Mostly sunny. Highs in the lower 30s.



Basemap Options
Click map to change the forecast location
Loading map...
119 PM CST Wed Dec 24 2025
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database