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

36°F

2°C

Humidity 50%
Wind Speed NE 8 mph
Barometer 30.38 in (1029.1 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 7 Feb 1:52 pm CST
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 38. East wind around 5 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 26. Southeast wind 5 to 7 mph.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 47. South southeast wind 5 to 8 mph.

    High: 47 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31. East southeast wind around 5 mph becoming calm in the evening.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56. Light and variable wind.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40. Calm wind becoming south southwest around 6 mph in the evening.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 64. South southwest wind 6 to 8 mph becoming northwest in the afternoon.

    High: 64 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely. Mostly cloudy, with a low around 40. North northeast wind around 7 mph.

    Low: 40 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers before noon. Mostly cloudy, with a high near 49. Northeast wind 6 to 8 mph.

    High: 49 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 38. East wind around 5 mph.
Tonight
Partly cloudy, with a low around 26. Southeast wind 5 to 7 mph.
Sunday
Partly sunny, with a high near 47. South southeast wind 5 to 8 mph.
Sunday Night
Mostly clear, with a low around 31. East southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 56. Light and variable wind.
Monday Night
Mostly clear, with a low around 40. Calm wind becoming south southwest around 6 mph in the evening.
Tuesday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 64. South southwest wind 6 to 8 mph becoming northwest in the afternoon.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 40. North northeast wind around 7 mph.
Wednesday
A chance of showers before noon. Mostly cloudy, with a high near 49. Northeast wind 6 to 8 mph.
Wednesday Night
A slight chance of showers after midnight. Mostly cloudy, with a low around 37. East northeast wind around 6 mph.
Thursday
A chance of showers. Mostly cloudy, with a high near 48. East northeast wind around 7 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 32. North northeast wind around 6 mph.
Friday
A slight chance of showers. Partly sunny, with a high near 47. Northeast wind 6 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
1:32 pm CST Feb 7, 2026
Forecast Valid:
2pm CST Feb 7, 2026-6pm CST Feb 13, 2026
 
Forecast Discussion
 
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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