Current conditions at

St. Louis Regional Airport (KALN)

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

Fair

5°F

-15°C

Humidity 55%
Wind Speed NW 8 mph
Barometer 30.37 in
Dewpoint -7°F (-22°C)
Visibility 10.00 mi
Wind Chill-8°F (-22°C)
Last update 26 Jan 12:35 am CST
Detailed forecast for

Macoupin County

Overnight
Mostly clear. Much colder with lows around 8 below. Northwest winds 5 to 10 mph with gusts up to 20 mph. Wind chill values as low as 26 below.
Monday
Sunny. Highs around 13. West winds 5 to 10 mph with gusts up to 20 mph. Wind chill values as low as 27 below.
Monday Night
Mostly clear. Not as cold with lows around 4 above. Temperature rising to around 12 after midnight. Southwest winds 10 to 15 mph with gusts up to 30 mph. Wind chill values as low as 13 below.
Tuesday
Sunny. Not as cool with highs in the mid 20s. West winds 10 to 15 mph with gusts up to 25 mph. Wind chill values as low as 3 below in the morning.
Tuesday Night
Mostly clear. Cold with lows around 3 below. Northwest winds around 5 mph.
Wednesday And Wednesday Night
Partly cloudy. Highs in the lower 20s. Lows around zero. Wind chill values as low as 15 below.
Thursday And Thursday Night
Mostly cloudy. Highs 15 to 20. Lows around zero.
Friday
Mostly sunny. Highs 15 to 20. Wind chill values as low as 10 below in the morning.
Friday Night
Mostly clear. Cold with lows 5 below to zero.
Saturday And Saturday Night
Partly cloudy. Highs around 20. Lows zero to 5 above zero.
Sunday
Partly sunny. Highs in the upper 20s. Wind chill values as low as 5 below in the morning.



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1019 PM CST Sun Jan 25 2026
 
 

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database