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

46°F

8°C

Humidity 96%
Wind Speed Calm
Barometer 30.09 in (1018.7 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 14 May 4:52 am CDT
Extended Forecast for

Anna IL

  • Today

    Today: Sunny, with a high near 76. Light east wind.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 53. South southeast wind 5 to 7 mph.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 83. South wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 83 °F

    Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 67. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 85. South southwest wind 11 to 13 mph, with gusts as high as 24 mph.

    High: 85 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. South wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. South wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 68. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South wind 10 to 18 mph, with gusts as high as 28 mph.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 76. Light east wind.
Tonight
Mostly clear, with a low around 53. South southeast wind 5 to 7 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, then gradually becoming sunny, with a high near 83. South wind 9 to 14 mph, with gusts as high as 23 mph.
Friday Night
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 67. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Saturday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 85. South southwest wind 11 to 13 mph, with gusts as high as 24 mph.
Saturday Night
Partly cloudy, with a low around 66. South wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 89. South wind 7 to 15 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 68. South wind 9 to 11 mph, with gusts as high as 21 mph.
Monday
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South wind 10 to 18 mph, with gusts as high as 28 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. South wind 10 to 13 mph, with gusts as high as 23 mph.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 83. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. South wind 6 to 9 mph, with gusts as high as 18 mph.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 81. South southwest wind around 8 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
5:31 am CDT May 14, 2026
Forecast Valid:
5am CDT May 14, 2026-6pm CDT May 20, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation