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 and Breezy

83°F

28°C

Humidity 37%
Wind Speed S 24 G 37 mph
Barometer 29.90 in (1012.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 31 Mar 3:52 pm CDT
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 82. Southwest wind around 18 mph, with gusts as high as 29 mph.

    High: 82 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 64. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    Low: 64 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 82. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 82 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A 10 percent chance of showers before 7pm. Partly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 66 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 16 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.

    High: 79 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. South southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 59. South wind around 11 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. Mostly cloudy, with a high near 70. South wind 10 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 70 °F

    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 82. Southwest wind around 18 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around 64. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 2pm. Partly sunny, with a high near 82. South southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
A 10 percent chance of showers before 7pm. Partly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 79. Breezy, with a south wind 16 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. South southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Friday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. South wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 59. South wind around 11 mph, with gusts as high as 20 mph.
Saturday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 70. South wind 10 to 14 mph becoming west northwest in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 40. Northwest wind around 11 mph, with gusts as high as 18 mph.
Sunday
Mostly sunny, with a high near 56. North northwest wind around 11 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 36. North wind 5 to 9 mph.
Monday
Sunny, with a high near 61. Northeast wind 5 to 7 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:
2:01 pm CDT Mar 31, 2026
Forecast Valid:
4pm CDT Mar 31, 2026-6pm CDT Apr 6, 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