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

29°F

-2°C

Humidity 51%
Wind Speed SW 8 mph
Barometer 30.34 in (1027.8 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 30 Dec 11:52 am CST
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Increasing clouds, with a high near 35. West wind around 7 mph.

    High: 35 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 26. Southwest wind around 7 mph.

    Low: 26 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 43. West northwest wind 5 to 7 mph.

    High: 43 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 27. Light and variable wind.

    Low: 27 °F

    Mostly Clear

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 43. North northeast wind around 5 mph becoming calm in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 32. Light and variable wind.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after noon. Cloudy, with a high near 48. Light and variable wind becoming east northeast around 6 mph in the afternoon.

    High: 48 °F

    Cloudy then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers before midnight. Mostly cloudy, with a low around 30. North northeast wind around 6 mph.

    Low: 30 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 43. North wind 3 to 7 mph.

    High: 43 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Increasing clouds, with a high near 35. West wind around 7 mph.
Tonight
Mostly clear, with a low around 26. Southwest wind around 7 mph.
Wednesday
Increasing clouds, with a high near 43. West northwest wind 5 to 7 mph.
Wednesday Night
Mostly clear, with a low around 27. Light and variable wind.
New Year's Day
Mostly sunny, with a high near 43. North northeast wind around 5 mph becoming calm in the afternoon.
Thursday Night
Mostly cloudy, with a low around 32. Light and variable wind.
Friday
A 20 percent chance of showers after noon. Cloudy, with a high near 48. Light and variable wind becoming east northeast around 6 mph in the afternoon.
Friday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 30. North northeast wind around 6 mph.
Saturday
Mostly sunny, with a high near 43. North wind 3 to 7 mph.
Saturday Night
Partly cloudy, with a low around 28. Calm wind.
Sunday
Mostly sunny, with a high near 49. Calm wind becoming south around 6 mph in the morning.
Sunday Night
Partly cloudy, with a low around 35. South wind around 6 mph becoming west southwest after midnight.
Monday
Sunny, with a high near 51. West southwest wind around 7 mph becoming northwest in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
10:41 am CST Dec 30, 2025
Forecast Valid:
12pm CST Dec 30, 2025-6pm CST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

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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