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.

Overcast

47°F

8°C

Humidity 80%
Wind Speed N 3 mph
Barometer 30.30 in (1026.1 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 7 Apr 3:52 am CDT
Extended Forecast for

Anna IL

  • Today

    Today: Mostly sunny, with a high near 59. East northeast wind 8 to 10 mph.

    High: 59 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. East northeast wind around 7 mph.

    Low: 39 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. South wind 6 to 10 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 51. South wind around 8 mph.

    Low: 51 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. South wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53. South wind around 6 mph.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77. South wind 6 to 10 mph.

    High: 77 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 58. South southwest wind around 5 mph becoming light and variable in the evening.

    Low: 58 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 80. Light and variable wind becoming south around 6 mph in the morning.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 59. East northeast wind 8 to 10 mph.
Tonight
Mostly clear, with a low around 39. East northeast wind around 7 mph.
Wednesday
Mostly sunny, with a high near 72. South wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 51. South wind around 8 mph.
Thursday
Sunny, with a high near 75. South wind 7 to 10 mph, with gusts as high as 18 mph.
Thursday Night
Mostly clear, with a low around 53. South wind around 6 mph.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77. South wind 6 to 10 mph.
Friday Night
A slight chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 58. South southwest wind around 5 mph becoming light and variable in the evening.
Saturday
Mostly sunny, with a high near 80. Light and variable wind becoming south around 6 mph in the morning.
Saturday Night
Mostly clear, with a low around 59. Southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 82. South wind 6 to 15 mph, with gusts as high as 25 mph.
Sunday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 64. South wind 11 to 13 mph, with gusts as high as 23 mph.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. South southwest wind 14 to 17 mph, with gusts as high as 28 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:
4:06 am CDT Apr 7, 2026
Forecast Valid:
4am CDT Apr 7, 2026-6pm CDT Apr 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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