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

41°F

5°C

Humidity 67%
Wind Speed N 12 mph
Barometer 30.14 in (1020.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 11 Feb 12:52 am CST
Extended Forecast for

Anna IL

  • Overnight

    Overnight: Partly cloudy, with a low around 32. North wind around 9 mph.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 48. North wind 5 to 9 mph.

    High: 48 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 30. North wind around 5 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 49. Calm wind becoming southeast around 5 mph.

    High: 49 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. Light east wind.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 55. Calm wind becoming southeast around 5 mph.

    High: 55 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. Light east southeast wind.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers. Mostly cloudy, with a high near 52. East southeast wind 3 to 7 mph.

    High: 52 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely. Mostly cloudy, with a low around 43. East wind 6 to 8 mph.

    Low: 43 °F

    Showers
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 32. North wind around 9 mph.
Wednesday
Sunny, with a high near 48. North wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 30. North wind around 5 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 49. Calm wind becoming southeast around 5 mph.
Thursday Night
Mostly cloudy, with a low around 33. Light east wind.
Friday
Mostly sunny, with a high near 55. Calm wind becoming southeast around 5 mph.
Friday Night
Mostly cloudy, with a low around 38. Light east southeast wind.
Saturday
A chance of showers. Mostly cloudy, with a high near 52. East southeast wind 3 to 7 mph.
Saturday Night
Showers likely. Mostly cloudy, with a low around 43. East wind 6 to 8 mph.
Sunday
A chance of showers before noon. Mostly sunny, with a high near 54. North wind 7 to 9 mph.
Sunday Night
Partly cloudy, with a low around 39. North wind around 6 mph becoming calm in the evening.
Washington's Birthday
Mostly sunny, with a high near 58. Light and variable wind becoming south southeast 5 to 7 mph in the morning.
Monday Night
Mostly cloudy, with a low around 44. South wind around 7 mph.
Tuesday
Mostly cloudy, with a high near 62. South wind 8 to 15 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:
1:17 am CST Feb 11, 2026
Forecast Valid:
1am CST Feb 11, 2026-6pm CST Feb 17, 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