National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

38°F

3°C

Humidity 55%
Wind Speed NW 3 mph
Barometer 30.22 in (1023.8 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 21 Feb 5:52 pm CST
Extended Forecast for

Anna IL

  • Tonight

    Tonight: Mostly clear, with a low around 23. North northwest wind 6 to 13 mph, with gusts as high as 23 mph.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 34. North northwest wind 13 to 18 mph, with gusts as high as 30 mph.

    High: 34 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 17. North northwest wind around 14 mph, with gusts as high as 23 mph.

    Low: 17 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 33. North northwest wind 7 to 13 mph, with gusts as high as 22 mph.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. North northwest wind around 5 mph becoming calm.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 48. South southwest wind 6 to 16 mph, with gusts as high as 26 mph.

    High: 48 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 59. Southwest wind around 11 mph, with gusts as high as 20 mph.

    High: 59 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 38. South southwest wind around 10 mph becoming north after midnight.

    Low: 38 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 23. North northwest wind 6 to 13 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 34. North northwest wind 13 to 18 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 17. North northwest wind around 14 mph, with gusts as high as 23 mph.
Monday
Sunny, with a high near 33. North northwest wind 7 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 19. North northwest wind around 5 mph becoming calm.
Tuesday
Partly sunny, with a high near 48. South southwest wind 6 to 16 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 43. South southwest wind 10 to 15 mph, with gusts as high as 24 mph.
Wednesday
Mostly cloudy, with a high near 59. Southwest wind around 11 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 38. South southwest wind around 10 mph becoming north after midnight.
Thursday
A chance of showers. Partly sunny, with a high near 51. Northwest wind 8 to 10 mph.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 29. North northwest wind 5 to 7 mph becoming south southwest after midnight.
Friday
Sunny, with a high near 56. South southwest wind 5 to 9 mph.
Friday Night
Mostly clear, with a low around 38. South wind around 7 mph.
Saturday
Mostly sunny, with a high near 60. South wind 7 to 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
5:12 pm CST Feb 21, 2026
Forecast Valid:
6pm CST Feb 21, 2026-6pm CST Feb 28, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation