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

60°F

16°C

Humidity 67%
Wind Speed S 14 mph
Barometer 29.96 in (1014.3 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 20 Mar 3:52 am CDT
Extended Forecast for

Anna IL

  • Today

    Today: Sunny, with a high near 79. West southwest wind 7 to 10 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 54. South southwest wind 5 to 7 mph becoming light and variable after midnight.

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79. Light and variable wind becoming east northeast around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 60. South wind 3 to 7 mph.

    Low: 60 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 84. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 44. Southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.

    Low: 44 °F

    Slight Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 60. North wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41. East northeast wind 5 to 7 mph.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61. East southeast wind around 6 mph.

    High: 61 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 79. West southwest wind 7 to 10 mph.
Tonight
Partly cloudy, with a low around 54. South southwest wind 5 to 7 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 79. Light and variable wind becoming east northeast around 5 mph in the afternoon.
Saturday Night
Clear, with a low around 60. South wind 3 to 7 mph.
Sunday
Sunny, with a high near 84. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Sunday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 44. Southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.
Monday
Sunny, with a high near 60. North wind 10 to 13 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 41. East northeast wind 5 to 7 mph.
Tuesday
Partly sunny, with a high near 61. East southeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 44. East wind 3 to 5 mph.
Wednesday
Partly sunny, with a high near 67. South southeast wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 51. South southeast wind 7 to 9 mph.
Thursday
Sunny, with a high near 78. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
1:26 am CDT Mar 20, 2026
Forecast Valid:
4am CDT Mar 20, 2026-6pm CDT Mar 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation