National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

74°F

23°C

Humidity 60%
Wind Speed S 10 mph
Barometer 29.88 in (1011.7 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 15 Apr 7:52 pm CDT
Extended Forecast for

Anna IL

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 63. South southwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 80. Southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 59. South southwest wind 3 to 6 mph. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. South wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 84 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 59. South wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 59 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. South southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 41. North northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 66. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42. North northwest wind around 6 mph becoming east southeast after midnight.

    Low: 42 °F

    Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 63. South southwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Thursday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 80. Southwest wind 8 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 59. South southwest wind 3 to 6 mph. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. South wind 5 to 14 mph, with gusts as high as 22 mph.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 59. South wind 11 to 13 mph, with gusts as high as 22 mph.
Saturday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. South southwest wind 11 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 41. North northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 66. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Clear, with a low around 42. North northwest wind around 6 mph becoming east southeast after midnight.
Monday
Sunny, with a high near 71. South wind 5 to 8 mph.
Monday Night
Mostly clear, with a low around 49. South wind around 6 mph.
Tuesday
Mostly sunny, with a high near 75. South southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around 54. South southwest wind 7 to 9 mph.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 78. South southwest wind 7 to 11 mph, with gusts as high as 18 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:
8:01 pm CDT Apr 15, 2026
Forecast Valid:
8pm CDT Apr 15, 2026-6pm CDT Apr 22, 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