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.

Overcast

27°F

-3°C

Humidity 69%
Wind Speed SW 7 mph
Barometer 30.22 in (1023.8 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 2 Feb 5:52 am CST
Extended Forecast for

Anna IL

  • Today

    Today: Mostly sunny, with a high near 38. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 38 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. South southeast wind around 5 mph becoming calm in the evening.

    Low: 28 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of freezing rain between 8am and 9am, then a chance of rain. Mostly cloudy, with a high near 38. Light and variable wind becoming north 5 to 8 mph in the afternoon. Chance of precipitation is 40%.

    High: 38 °F

    Chance
    Rain/Freezing
    Rain then
    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21. North wind 6 to 8 mph.

    Low: 21 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31. North wind 6 to 8 mph.

    High: 31 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 16. North northwest wind around 5 mph becoming calm in the evening.

    Low: 16 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 36. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 36 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. Southwest wind around 8 mph.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 47. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.

    High: 47 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 38. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 28. South southeast wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of freezing rain between 8am and 9am, then a chance of rain. Mostly cloudy, with a high near 38. Light and variable wind becoming north 5 to 8 mph in the afternoon. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 21. North wind 6 to 8 mph.
Wednesday
Partly sunny, with a high near 31. North wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 16. North northwest wind around 5 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 36. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 28. Southwest wind around 8 mph.
Friday
Sunny, with a high near 47. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 22. North northwest wind around 6 mph.
Saturday
Sunny, with a high near 37. North northeast wind around 6 mph.
Saturday Night
Partly cloudy, with a low around 23. East wind around 6 mph.
Sunday
Mostly sunny, with a high near 42. South wind 5 to 7 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
6:26 am CST Feb 2, 2026
Forecast Valid:
6am CST Feb 2, 2026-6pm CST Feb 8, 2026
 
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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