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

86°F

30°C

Humidity 43%
Wind Speed S 17 mph
Barometer 29.63 in (1003.0 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 22 Mar 2:52 pm CDT
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 85. South southwest wind around 15 mph, with gusts as high as 24 mph.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms between 10pm and 11pm. Mostly cloudy, then gradually becoming clear, with a low around 37. Southwest wind 11 to 18 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 30%.

    Low: 37 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56. North northeast wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39. Northeast wind around 7 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62. East southeast wind around 6 mph.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 44. Light east southeast wind.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. Light south wind becoming south southwest 5 to 9 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60. South wind 7 to 9 mph.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 85 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 85. South southwest wind around 15 mph, with gusts as high as 24 mph.
Tonight
A chance of showers and thunderstorms between 10pm and 11pm. Mostly cloudy, then gradually becoming clear, with a low around 37. Southwest wind 11 to 18 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 30%.
Monday
Sunny, with a high near 56. North northeast wind 11 to 14 mph, with gusts as high as 23 mph.
Monday Night
Mostly cloudy, with a low around 39. Northeast wind around 7 mph.
Tuesday
Mostly sunny, with a high near 62. East southeast wind around 6 mph.
Tuesday Night
Partly cloudy, with a low around 44. Light east southeast wind.
Wednesday
Mostly sunny, with a high near 74. Light south wind becoming south southwest 5 to 9 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 60. South wind 7 to 9 mph.
Thursday
Sunny, with a high near 85. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Thursday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 45. South southwest wind 11 to 13 mph becoming north after midnight. Winds could gust as high as 22 mph.
Friday
A chance of showers. Mostly cloudy, with a high near 56. North wind around 15 mph, with gusts as high as 23 mph.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 33. North wind 8 to 13 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 57. Northeast wind around 8 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:
1:26 pm CDT Mar 22, 2026
Forecast Valid:
3pm CDT Mar 22, 2026-6pm CDT Mar 28, 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