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

Southern Illinois Airport (KMDH)

Lat: 37.78°NLon: 89.25°WElev: 400ft.

Fair

36°F

2°C

Humidity 73%
Wind Speed Calm
Barometer 30.23 in (1023.8 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 13 Feb 12:52 am CST
Extended Forecast for

Anna IL

  • Overnight

    Overnight: Mostly clear, with a low around 32. East southeast wind 3 to 5 mph.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57. South wind 5 to 8 mph.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 37. South wind 3 to 5 mph.

    Low: 37 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers, mainly after noon. High near 53. Calm wind becoming east southeast 5 to 7 mph in the morning. Chance of precipitation is 80%.

    High: 53 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 45. East southeast wind around 8 mph. Chance of precipitation is 90%.

    Low: 45 °F

    Showers

  • Sunday

    Sunday: A 50 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 55. North northeast wind 8 to 10 mph, with gusts as high as 20 mph.

    High: 55 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. North northeast wind 5 to 7 mph becoming calm after midnight.

    Low: 39 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60. Calm wind becoming south southeast around 6 mph in the morning.

    High: 60 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 45. South wind 3 to 6 mph.

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 32. East southeast wind 3 to 5 mph.
Friday
Sunny, with a high near 57. South wind 5 to 8 mph.
Friday Night
Partly cloudy, with a low around 37. South wind 3 to 5 mph.
Saturday
Showers, mainly after noon. High near 53. Calm wind becoming east southeast 5 to 7 mph in the morning. Chance of precipitation is 80%.
Saturday Night
Showers. Low around 45. East southeast wind around 8 mph. Chance of precipitation is 90%.
Sunday
A 50 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 55. North northeast wind 8 to 10 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 39. North northeast wind 5 to 7 mph becoming calm after midnight.
Washington's Birthday
Mostly sunny, with a high near 60. Calm wind becoming south southeast around 6 mph in the morning.
Monday Night
Mostly cloudy, with a low around 45. South wind 3 to 6 mph.
Tuesday
Mostly cloudy, with a high near 65. South wind 6 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 55. South southwest wind 14 to 16 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, with a high near 68. South southwest wind 13 to 16 mph, with gusts as high as 25 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 49. Southwest wind 8 to 11 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 64. Southwest wind 8 to 11 mph, with gusts as high as 20 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:
10:41 pm CST Feb 12, 2026
Forecast Valid:
1am CST Feb 13, 2026-6pm CST Feb 19, 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