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Macoupin, Illinois Weather Forecast
Macoupin, Illinois Weather
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Weather Forecast for Macoupin, Illinois : Macoupin County
Issued: 2:21 am CST Dec 21, 2025 Latitude: 39.2133798 Longitude: -89.957325 View on Google Maps

MouseOver for Detail Forecast
Overnight Sunday Monday Tuesday Wednesday Christmas Day Friday Saturday
Mostly Clear on Overnight Sunny on Sunday Mostly Cloudy on Monday Sunny on Tuesday Cloudy on Wednesday Partly Sunny on Christmas Day Partly Sunny on Friday Partly Sunny on Saturday
Low: 23°F High: 42°F High: 49°F High: 58°F High: 64°F High: 70°F High: 56°F High: 54°F
Low: 28°F Low: 42°F Low: 40°F Low: 53°F Low: 45°F Low: 36°F  
Mostly Clear Sunny Mostly Cloudy Sunny Cloudy Partly Sunny Partly Sunny Partly Sunny
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Current Conditions at
LITCHFIELD MUNI ARP - (K3LF)
27°
Clear
as of 2:55 AM CST
Rel. Humidity: 73%
Dew Point: 19°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
6 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
ALTON - (KALN)
34°
Clear
as of 2:55 AM CST
Rel. Humidity: 50%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
5 MPH
350° North
Cloud Level(s): Clear
Current Conditions at
ST CHARLES - (KSET)
32°
Feels like 24°F
Clear
as of 2:54 AM CST
Rel. Humidity: 50%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
9 MPH
0° North
Cloud Level(s): Clear
Current Conditions at
ST LOUIS - (KSTL)
28°
Mostly Clear
as of 2:51 AM CST
Rel. Humidity: 63%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
3 MPH
340° North
Cloud Level(s): Few at 25000ft
Mostly Clear on Overnight Overnight... Mostly clear, with a low around 23. Light north wind.
Sunny on Sunday Sunday... Sunny, with a high near 42. Calm wind becoming east around 5 mph in the afternoon.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 28. Southeast wind 5 to 8 mph.
Mostly Cloudy on Monday Monday... Sunny through mid morning, then becoming mostly cloudy, with a high near 49. South wind around 10 mph.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 42. South wind 6 to 9 mph.
Sunny on Tuesday Tuesday... Sunny, with a high near 58.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 40.
Cloudy on Wednesday Wednesday... Cloudy, with a high near 64.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 53.
Partly Sunny on Christmas Day Christmas Day... Partly sunny, with a high near 70.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 45.
Partly Sunny on Friday Friday... Partly sunny, with a high near 56.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 36.
Partly Sunny on Saturday Saturday... Partly sunny, with a high near 54.
Current Radar Image


Sun Almanac for Macoupin, Illinois
Sunrise: 07:16 AM
Sunset: 4:40 PM
Civil Sunrise:06:46 AM
Civil Sunset: 5:10 PM
Nautical Sunrise: 06:12 AM
Nautical Sunset: 5:44 PM
Astro Sunrise: 05:40 AM
Astro Sunset: 6:17 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.