Current conditions at

St. Louis Regional Airport (KALN)

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

Fair

77°F

25°C

Humidity 79%
Wind Speed N 7 mph
Barometer 30.10 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 7 Jul 8:50 am CDT
Detailed forecast for

Macoupin County

Today
Partly sunny. Highs in the mid 80s. North winds 5 to 10 mph.
Tonight
Mostly clear. Lows in the mid 60s. Northeast winds around 5 mph.
Wednesday
Mostly sunny. Highs in the upper 80s. East winds around 5 mph, becoming south in the afternoon.
Wednesday Night
Mostly clear. Lows in the upper 60s. South winds around 5 mph.
Thursday
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 100.
Thursday Night
Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers and thunderstorms likely after midnight. Lows in the lower 70s. Chance of rain 70 percent.
Friday
Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40 percent.
Friday Night
Thunderstorms likely. Showers likely, mainly in the evening. Lows in the upper 60s. Chance of rain 60 percent.
Saturday
Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent.
Saturday Night
Partly cloudy. A chance of showers and thunderstorms, mainly in the evening. Lows in the upper 60s. Chance of rain 30 percent.
Sunday
Mostly sunny. Highs in the upper 80s.
Sunday Night And Monday
Mostly clear. Lows in the upper 60s. Highs around 90.



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748 AM CDT Tue Jul 7 2026
 
 

Additional Resources

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