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

54°F

12°C

Humidity 35%
Wind Speed SE 7 mph
Barometer 30.21 in (1023.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 12 Feb 3:52 pm CST
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 52. Light east southeast wind.

    High: 52 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 32. Light east southeast wind.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57. South southeast wind around 6 mph becoming calm in the afternoon.

    High: 57 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 37. Calm wind.

    Low: 37 °F

    Increasing
    Clouds

  • 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

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 52. Light east southeast wind.
Tonight
Mostly clear, with a low around 32. Light east southeast wind.
Friday
Sunny, with a high near 57. South southeast wind around 6 mph becoming calm in the afternoon.
Friday Night
Increasing clouds, with a low around 37. Calm wind.
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.
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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:
3:21 pm CST Feb 12, 2026
Forecast Valid:
4pm CST Feb 12, 2026-6pm CST Feb 18, 2026
 
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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