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

40°F

4°C

Humidity 60%
Wind Speed N 5 mph
Barometer 30.31 in (1026.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 11 Feb 7:52 pm CST
Extended Forecast for

Anna IL

  • Tonight

    Tonight: Mostly clear, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 50. Light east wind.

    High: 50 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Sunny, with a high near 56. Calm wind becoming south southeast around 6 mph.

    High: 56 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. Light southeast wind.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers. Mostly cloudy, with a high near 51. Southeast wind 3 to 7 mph.

    High: 51 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely. Cloudy, with a low around 45. East wind 6 to 9 mph. Chance of precipitation is 70%.

    Low: 45 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers before noon. Partly sunny, with a high near 53. North wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 53 °F

    Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. North wind 3 to 7 mph.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 31. Calm wind.
Thursday
Increasing clouds, with a high near 50. Light east wind.
Thursday Night
Mostly cloudy, with a low around 32. Calm wind.
Friday
Sunny, with a high near 56. Calm wind becoming south southeast around 6 mph.
Friday Night
Mostly cloudy, with a low around 37. Light southeast wind.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 51. Southeast wind 3 to 7 mph.
Saturday Night
Showers likely. Cloudy, with a low around 45. East wind 6 to 9 mph. Chance of precipitation is 70%.
Sunday
A chance of showers before noon. Partly sunny, with a high near 53. North wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 37. North wind 3 to 7 mph.
Washington's Birthday
Sunny, with a high near 60. Light and variable wind becoming south southeast 5 to 8 mph in the morning.
Monday Night
Mostly cloudy, with a low around 44. South wind 6 to 8 mph.
Tuesday
Mostly cloudy, with a high near 62. South wind 8 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 53. South southwest wind around 15 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of showers. Partly sunny, with a high near 66. South southwest wind around 14 mph, with gusts as high as 24 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:
5:22 pm CST Feb 11, 2026
Forecast Valid:
8pm CST Feb 11, 2026-6pm CST Feb 18, 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