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.

Mostly Cloudy and Breezy

69°F

21°C

Humidity 84%
Wind Speed S 21 G 35 mph
Barometer 29.89 in (1011.9 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 7 Mar 3:52 am CST
Extended Forecast for

Anna IL

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South southwest wind around 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. High near 71. South southwest wind 10 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.

    High: 71 °F

    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming light north northwest after midnight.

    Low: 42 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 65. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 46. South southwest wind around 6 mph.

    Low: 46 °F

    Clear

  • Monday

    Monday: Mostly sunny, with a high near 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 73 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 61. South southwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 77. South southwest wind 9 to 15 mph, with gusts as high as 25 mph.

    High: 77 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Cloudy, with a low around 61. South southwest wind 15 to 17 mph, with gusts as high as 28 mph.

    Low: 61 °F

    Showers

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. South southwest wind around 15 mph, with gusts as high as 25 mph.
Saturday
Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. High near 71. South southwest wind 10 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%.
Saturday Night
A 20 percent chance of showers and thunderstorms before 7pm. Mostly cloudy, with a low around 42. Northwest wind 5 to 9 mph becoming light north northwest after midnight.
Sunday
Sunny, with a high near 65. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Clear, with a low around 46. South southwest wind around 6 mph.
Monday
Mostly sunny, with a high near 73. South southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 61. South southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Cloudy, with a high near 77. South southwest wind 9 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Showers and possibly a thunderstorm. Cloudy, with a low around 61. South southwest wind 15 to 17 mph, with gusts as high as 28 mph.
Wednesday
Showers and possibly a thunderstorm. Cloudy, with a high near 69. South southwest wind around 17 mph becoming north northwest in the afternoon. Winds could gust as high as 30 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 36. North northwest wind 8 to 16 mph, with gusts as high as 24 mph.
Thursday
Sunny, with a high near 54. North northwest wind 6 to 9 mph becoming west southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 39. South wind 6 to 11 mph, with gusts as high as 21 mph.
Friday
Mostly cloudy, with a high near 63. South southwest wind 13 to 16 mph, with gusts as high as 26 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
12:26 am CST Mar 7, 2026
Forecast Valid:
4am CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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