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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Anna IL

  • Overnight

    Overnight: Partly cloudy, with a low around 4. West northwest wind 3 to 5 mph.

    Low: 4 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 27. Wind chill values as low as -3. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 27 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A 40 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 19. South southwest wind 3 to 7 mph.

    Low: 19 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 38. Southwest wind 3 to 5 mph.

    High: 38 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25. Light south southeast wind.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of freezing rain before 9am, then a chance of rain showers between 9am and 3pm, then a chance of snow showers after 3pm. Mostly cloudy, with a high near 37. Light and variable wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 30%.

    High: 37 °F

    Chance Wintry
    Mix

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21. North wind around 7 mph.

    Low: 21 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31. North wind 6 to 8 mph.

    High: 31 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13. North wind around 6 mph becoming calm in the evening.

    Low: 13 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 4. West northwest wind 3 to 5 mph.
Sunday
Increasing clouds, with a high near 27. Wind chill values as low as -3. Calm wind becoming south southwest 5 to 9 mph in the morning.
Sunday Night
A 40 percent chance of snow, mainly before 10pm. Mostly cloudy, with a low around 19. South southwest wind 3 to 7 mph.
Monday
Mostly sunny, with a high near 38. Southwest wind 3 to 5 mph.
Monday Night
Mostly cloudy, with a low around 25. Light south southeast wind.
Tuesday
A slight chance of freezing rain before 9am, then a chance of rain showers between 9am and 3pm, then a chance of snow showers after 3pm. Mostly cloudy, with a high near 37. Light and variable wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 21. North wind around 7 mph.
Wednesday
Partly sunny, with a high near 31. North wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 13. North wind around 6 mph becoming calm in the evening.
Thursday
Mostly sunny, with a high near 34. Calm wind becoming south southwest 5 to 7 mph in the morning.
Thursday Night
Partly cloudy, with a low around 27. South southwest wind 7 to 9 mph.
Friday
Mostly sunny, with a high near 47. West southwest wind 8 to 10 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 22. North wind around 7 mph.
Saturday
Mostly sunny, with a high near 34. North northeast wind around 6 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:
3:16 am CST Feb 1, 2026
Forecast Valid:
3am CST Feb 1, 2026-6pm CST Feb 7, 2026
 
Forecast Discussion
 
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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