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

68°F

20°C

Humidity 87%
Wind Speed S 14 G 23 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 3 Apr 3:52 am CDT
Extended Forecast for

Anna IL

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 65 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, with a high near 81. South southwest wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 81 °F

    Chance
    T-storms then
    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 61. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 61 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 69. Southwest wind 10 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%.

    High: 69 °F

    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 41. Northwest wind 6 to 9 mph.

    Low: 41 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 61. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 61 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 39. North northwest wind around 6 mph becoming calm in the evening.

    Low: 39 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 64. Light west northwest wind becoming north northwest 5 to 9 mph in the morning.

    High: 64 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38. North wind 6 to 8 mph.

    Low: 38 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 65. South southwest wind around 10 mph, with gusts as high as 20 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 9am. Mostly cloudy, with a high near 81. South southwest wind 10 to 15 mph, with gusts as high as 26 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 61. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Saturday
Showers and possibly a thunderstorm. High near 69. Southwest wind 10 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%.
Saturday Night
Partly cloudy, with a low around 41. Northwest wind 6 to 9 mph.
Sunday
Sunny, with a high near 61. Northwest wind 5 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Clear, with a low around 39. North northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 64. Light west northwest wind becoming north northwest 5 to 9 mph in the morning.
Monday Night
Partly cloudy, with a low around 38. North wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 56. Northeast wind around 8 mph.
Tuesday Night
Partly cloudy, with a low around 38. East southeast wind around 6 mph.
Wednesday
Mostly sunny, with a high near 69. South wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 51. South wind around 9 mph.
Thursday
Mostly sunny, with a high near 74. South wind 9 to 14 mph, with gusts as high as 23 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:
3:21 am CDT Apr 3, 2026
Forecast Valid:
4am CDT Apr 3, 2026-6pm CDT Apr 9, 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