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

29°F

-2°C

Humidity 92%
Wind Speed Calm
Barometer 30.01 in (1016.8 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 31 Dec 8:52 pm CST
Extended Forecast for

Anna IL

  • Tonight

    Tonight: Mostly clear, with a low around 29. Light and variable wind.

    Low: 29 °F

    Mostly Clear

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 43. Northeast wind around 6 mph becoming calm in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 45. Calm wind becoming east northeast around 6 mph in the afternoon.

    High: 45 °F

    Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly before midnight. Cloudy, with a low around 32. North northeast wind around 6 mph.

    Low: 32 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 43. North wind around 7 mph.

    High: 43 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. North wind around 5 mph becoming calm in the evening.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 44. Light and variable wind.

    High: 44 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 33. Calm wind becoming south 5 to 7 mph in the evening.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 29. Light and variable wind.
New Year's Day
Mostly sunny, with a high near 43. Northeast wind around 6 mph becoming calm in the afternoon.
Thursday Night
Mostly cloudy, with a low around 31. Calm wind.
Friday
Cloudy, with a high near 45. Calm wind becoming east northeast around 6 mph in the afternoon.
Friday Night
A 30 percent chance of showers, mainly before midnight. Cloudy, with a low around 32. North northeast wind around 6 mph.
Saturday
Partly sunny, with a high near 43. North wind around 7 mph.
Saturday Night
Mostly clear, with a low around 26. North wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 44. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 33. Calm wind becoming south 5 to 7 mph in the evening.
Monday
Sunny, with a high near 54. South southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 42. South wind around 6 mph.
Tuesday
Mostly sunny, with a high near 59. South southwest wind 6 to 8 mph.
Tuesday Night
Partly cloudy, with a low around 40. South southwest wind around 6 mph becoming north northwest after midnight.
Wednesday
Mostly sunny, with a high near 54. North northwest wind 5 to 7 mph becoming south southwest in the afternoon.
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:
7:47 pm CST Dec 31, 2025
Forecast Valid:
9pm CST Dec 31, 2025-6pm CST Jan 7, 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