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

30°F

-1°C

Humidity 88%
Wind Speed Calm
Barometer 30.32 in (1027.0 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 12 Feb 7:52 am CST
Extended Forecast for

Anna IL

  • Today

    Today: Mostly sunny, with a high near 51. Southeast wind 3 to 6 mph.

    High: 51 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 31. East southeast wind 3 to 5 mph.

    Low: 31 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 56. South southeast wind 3 to 6 mph.

    High: 56 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 38. Calm wind.

    Low: 38 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain likely, mainly after noon. Cloudy, with a high near 51. Calm wind becoming east southeast 5 to 7 mph in the morning. Chance of precipitation is 70%.

    High: 51 °F

    Chance Rain
    then Rain
    Likely

  • Saturday Night

    Saturday Night: Rain. Low around 45. East southeast wind 7 to 9 mph becoming northeast after midnight. Chance of precipitation is 90%.

    Low: 45 °F

    Rain

  • Sunday

    Sunday: A 50 percent chance of rain, mainly before noon. Partly sunny, with a high near 55. North northeast wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 55 °F

    Chance Rain
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37. North wind 5 to 7 mph becoming calm in the evening.

    Low: 37 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Sunny, with a high near 59. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 59 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 51. Southeast wind 3 to 6 mph.
Tonight
Partly cloudy, with a low around 31. East southeast wind 3 to 5 mph.
Friday
Sunny, with a high near 56. South southeast wind 3 to 6 mph.
Friday Night
Increasing clouds, with a low around 38. Calm wind.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 51. Calm wind becoming east southeast 5 to 7 mph in the morning. Chance of precipitation is 70%.
Saturday Night
Rain. Low around 45. East southeast wind 7 to 9 mph becoming northeast after midnight. Chance of precipitation is 90%.
Sunday
A 50 percent chance of rain, mainly before noon. Partly sunny, with a high near 55. North northeast wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 37. North wind 5 to 7 mph becoming calm in the evening.
Washington's Birthday
Sunny, with a high near 59. Calm wind becoming south southeast 5 to 7 mph in the morning.
Monday Night
Mostly cloudy, with a low around 44. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 64. South wind 7 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 54. South southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 66. Southwest wind 11 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:
5:06 am CST Feb 12, 2026
Forecast Valid:
8am CST Feb 12, 2026-6pm CST Feb 18, 2026
 
Forecast Discussion
 
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Additional Resources

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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