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

70°F

21°C

Humidity 32%
Wind Speed S 13 mph
Barometer 30.07 in (1018.0 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 25 Mar 11:52 am CDT
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 75. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. South wind 9 to 13 mph, with gusts as high as 21 mph.

    Low: 62 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. South southwest wind 13 to 18 mph, with gusts as high as 29 mph.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 46. South southwest wind 11 to 17 mph, with gusts as high as 28 mph.

    Low: 46 °F

    Partly Cloudy
    then Chance
    T-storms

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 58. North wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    High: 58 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 33. North wind 7 to 14 mph, with gusts as high as 22 mph.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 56. East wind around 7 mph.

    High: 56 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. East wind 3 to 5 mph.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 65. South wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 65 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 75. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 62. South wind 9 to 13 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 84. South southwest wind 13 to 18 mph, with gusts as high as 29 mph.
Thursday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 46. South southwest wind 11 to 17 mph, with gusts as high as 28 mph.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 58. North wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Friday Night
Mostly clear, with a low around 33. North wind 7 to 14 mph, with gusts as high as 22 mph.
Saturday
Sunny, with a high near 56. East wind around 7 mph.
Saturday Night
Partly cloudy, with a low around 39. East wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 65. South wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 54. South wind around 10 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 76. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Monday Night
Partly cloudy, with a low around 61. South southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 77. South southwest wind 10 to 15 mph, with gusts as high as 23 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:
11:51 am CDT Mar 25, 2026
Forecast Valid:
12pm CDT Mar 25, 2026-6pm CDT Mar 31, 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