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

42°F

6°C

Humidity 53%
Wind Speed SE 9 mph
Barometer 30.14 in (1021.1 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 8 Feb 2:52 pm CST
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 44. Southeast wind around 6 mph.

    High: 44 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 29. East wind around 6 mph becoming calm after midnight.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. South southwest wind 3 to 6 mph.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 62. South southwest wind around 7 mph becoming north northwest in the afternoon.

    High: 62 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 35. North wind around 6 mph.

    Low: 35 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 50. North wind around 7 mph.

    High: 50 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 31. Northeast wind 3 to 5 mph.

    Low: 31 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers after noon. Mostly cloudy, with a high near 46. East wind around 6 mph.

    High: 46 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 44. Southeast wind around 6 mph.
Tonight
Mostly clear, with a low around 29. East wind around 6 mph becoming calm after midnight.
Monday
Mostly sunny, with a high near 54. Light and variable wind.
Monday Night
Mostly clear, with a low around 40. South southwest wind 3 to 6 mph.
Tuesday
Partly sunny, with a high near 62. South southwest wind around 7 mph becoming north northwest in the afternoon.
Tuesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 35. North wind around 6 mph.
Wednesday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 50. North wind around 7 mph.
Wednesday Night
Mostly cloudy, with a low around 31. Northeast wind 3 to 5 mph.
Thursday
A slight chance of showers after noon. Mostly cloudy, with a high near 46. East wind around 6 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 34. East wind around 6 mph.
Friday
A chance of showers. Partly sunny, with a high near 47. East northeast wind around 7 mph.
Friday Night
A chance of showers. Partly cloudy, with a low around 33. East wind around 7 mph.
Saturday
A chance of showers. Mostly cloudy, with a high near 49. East wind around 8 mph becoming south 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:
2:22 pm CST Feb 8, 2026
Forecast Valid:
3pm CST Feb 8, 2026-6pm CST Feb 14, 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