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.

A Few Clouds and Breezy

70°F

21°C

Humidity 61%
Wind Speed S 22 G 32 mph
Barometer 30.01 in (1016.1 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 3 Mar 2:52 pm CST
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 71. South southwest wind around 9 mph, with gusts as high as 20 mph.

    High: 71 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers before 3am, then a chance of showers and thunderstorms between 3am and 5am, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 57. South wind around 6 mph. Chance of precipitation is 60%.

    Low: 57 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms between 8am and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 72. South southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.

    High: 72 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 59. South southwest wind 6 to 9 mph. Chance of precipitation is 90%.

    Low: 59 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 70. South southwest wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 70 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. South wind around 7 mph. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 77. South wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 69. Southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 69 °F

    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 71. South southwest wind around 9 mph, with gusts as high as 20 mph.
Tonight
A chance of showers before 3am, then a chance of showers and thunderstorms between 3am and 5am, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 57. South wind around 6 mph. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms between 8am and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 72. South southwest wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 59. South southwest wind 6 to 9 mph. Chance of precipitation is 90%.
Thursday
Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. High near 70. South southwest wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. South wind around 7 mph. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 77. South wind 8 to 15 mph, with gusts as high as 24 mph.
Friday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 61. South wind 9 to 11 mph, with gusts as high as 21 mph.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 69. Southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 47. West northwest wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers. Mostly sunny, with a high near 66. Calm wind becoming south southwest 5 to 7 mph in the morning.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 51. South southwest wind around 5 mph.
Monday
A slight chance of showers. Sunny, with a high near 73. South southwest wind 5 to 9 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:
1:36 pm CST Mar 3, 2026
Forecast Valid:
3pm CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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