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.

Overcast

50°F

10°C

Humidity 54%
Wind Speed NE 3 mph
Barometer 29.79 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 25 Feb 5:52 pm CST
Extended Forecast for

Anna IL

  • Tonight

    Tonight: Showers likely, mainly between 3am and 5am. Mostly cloudy, with a low around 39. East northeast wind around 6 mph. Chance of precipitation is 60%.

    Low: 39 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Partly sunny, with a high near 56. East northeast wind 3 to 7 mph.

    High: 56 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64. Calm wind becoming southwest 5 to 8 mph in the morning.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 42. South southwest wind around 6 mph.

    Low: 42 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 67. South southwest wind 5 to 9 mph.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 36. South southwest wind 8 to 11 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.

    Low: 36 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers after noon. Mostly cloudy, with a high near 51. East northeast wind around 11 mph, with gusts as high as 18 mph.

    High: 51 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of rain showers before midnight, then rain likely, possibly mixed with snow showers. Cloudy, with a low around 35. Northeast wind around 10 mph.

    Low: 35 °F

    Chance
    Showers then
    Rain/Snow
    Likely

Detailed Forecast

Tonight
Showers likely, mainly between 3am and 5am. Mostly cloudy, with a low around 39. East northeast wind around 6 mph. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 56. East northeast wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 36. Calm wind.
Friday
Sunny, with a high near 64. Calm wind becoming southwest 5 to 8 mph in the morning.
Friday Night
Clear, with a low around 42. South southwest wind around 6 mph.
Saturday
Sunny, with a high near 67. South southwest wind 5 to 9 mph.
Saturday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 36. South southwest wind 8 to 11 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Sunday
A chance of showers after noon. Mostly cloudy, with a high near 51. East northeast wind around 11 mph, with gusts as high as 18 mph.
Sunday Night
A chance of rain showers before midnight, then rain likely, possibly mixed with snow showers. Cloudy, with a low around 35. Northeast wind around 10 mph.
Monday
A chance of rain and snow showers before noon, then a slight chance of rain showers. Cloudy, with a high near 45. Northeast wind around 10 mph, with gusts as high as 18 mph.
Monday Night
A chance of showers. Cloudy, with a low around 33. East northeast wind around 8 mph.
Tuesday
A chance of showers. Cloudy, with a high near 50. East wind 6 to 8 mph becoming west southwest in the afternoon.
Tuesday Night
A chance of showers. Cloudy, with a low around 38. North wind around 7 mph becoming east northeast after midnight.
Wednesday
A chance of showers. Mostly cloudy, with a high near 56. East wind around 8 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:
2:36 pm CST Feb 25, 2026
Forecast Valid:
6pm CST Feb 25, 2026-6pm CST Mar 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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