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

44°F

7°C

Humidity 53%
Wind Speed Calm
Barometer 30.13 in (1020.5 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 9 Feb 11:52 am CST
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 55. Calm wind.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 39. Calm wind becoming south southwest 5 to 7 mph in the evening.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62. Southwest wind around 7 mph becoming north northwest in the afternoon.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 34. North wind around 7 mph.

    Low: 34 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49. North wind 5 to 7 mph.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 31. Light northeast wind.

    Low: 31 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 47. East wind 3 to 6 mph.

    High: 47 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of showers. Mostly cloudy, with a low around 34. East wind around 6 mph.

    Low: 34 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, mainly after noon. Mostly cloudy, with a high near 46. East northeast wind around 7 mph.

    High: 46 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 55. Calm wind.
Tonight
Partly cloudy, with a low around 39. Calm wind becoming south southwest 5 to 7 mph in the evening.
Tuesday
Mostly sunny, with a high near 62. Southwest wind around 7 mph becoming north northwest in the afternoon.
Tuesday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 34. North wind around 7 mph.
Wednesday
Mostly sunny, with a high near 49. North wind 5 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 31. Light northeast wind.
Thursday
Mostly cloudy, with a high near 47. East wind 3 to 6 mph.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 34. East wind around 6 mph.
Friday
A chance of showers, mainly after noon. Mostly cloudy, with a high near 46. East northeast wind around 7 mph.
Friday Night
A chance of showers, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 34. East northeast wind around 7 mph.
Saturday
Showers likely. Mostly cloudy, with a high near 48. East northeast wind 7 to 10 mph.
Saturday Night
Showers likely. Mostly cloudy, with a low around 35. North wind around 10 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 49. Northwest wind 7 to 11 mph, with gusts as high as 18 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:
10:27 am CST Feb 9, 2026
Forecast Valid:
12pm CST Feb 9, 2026-6pm CST Feb 15, 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