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.

Fog/Mist

49°F

9°C

Humidity 90%
Wind Speed S 16 mph
Barometer 29.97 in (1014.9 mb)
Dewpoint 46°F (8°C)
Visibility 6.00 mi
Wind Chill43°F (6°C)
Last update 17 Feb 10:52 am CST
Extended Forecast for

Anna IL

  • Today

    Today: Cloudy, with a high near 57. South southwest wind 11 to 13 mph, with gusts as high as 26 mph.

    High: 57 °F

    Cloudy

  • Tonight

    Tonight: A slight chance of showers between 2am and 4am. Cloudy, with a low around 56. South southwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 56 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 70. Southwest wind 9 to 13 mph, with gusts as high as 25 mph.

    High: 70 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after midnight. Partly cloudy, with a low around 55. South wind 6 to 8 mph.

    Low: 55 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 70. South southwest wind 7 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40. South southwest wind 7 to 14 mph becoming west northwest after midnight. Winds could gust as high as 22 mph.

    Low: 40 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55. West northwest wind 6 to 9 mph.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: A slight chance of showers after midnight. Partly cloudy, with a low around 34. North wind around 6 mph.

    Low: 34 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Mostly sunny, with a high near 47. North northwest wind 6 to 9 mph.

    High: 47 °F

    Chance
    Showers

Detailed Forecast

Today
Cloudy, with a high near 57. South southwest wind 11 to 13 mph, with gusts as high as 26 mph.
Tonight
A slight chance of showers between 2am and 4am. Cloudy, with a low around 56. South southwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 70. Southwest wind 9 to 13 mph, with gusts as high as 25 mph.
Wednesday Night
A 30 percent chance of showers after midnight. Partly cloudy, with a low around 55. South wind 6 to 8 mph.
Thursday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 70. South southwest wind 7 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40. South southwest wind 7 to 14 mph becoming west northwest after midnight. Winds could gust as high as 22 mph.
Friday
Sunny, with a high near 55. West northwest wind 6 to 9 mph.
Friday Night
A slight chance of showers after midnight. Partly cloudy, with a low around 34. North wind around 6 mph.
Saturday
A chance of showers. Mostly sunny, with a high near 47. North northwest wind 6 to 9 mph.
Saturday Night
A slight chance of rain and snow showers. Mostly clear, with a low around 28. North northwest wind 7 to 9 mph.
Sunday
Sunny, with a high near 41. Northwest wind 9 to 11 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 20. North northwest wind 6 to 8 mph.
Monday
Sunny, with a high near 39. North northwest wind 5 to 8 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:
10:56 am CST Feb 17, 2026
Forecast Valid:
11am CST Feb 17, 2026-6pm CST Feb 23, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation