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.

Overcast

31°F

-1°C

Humidity 59%
Wind Speed W 18 G 30 mph
Barometer 29.98 in (1015.6 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 16 Mar 2:52 pm CDT
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 34. Northwest wind around 18 mph, with gusts as high as 30 mph.

    High: 34 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 18. Northwest wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 18 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 38. Northwest wind 6 to 8 mph becoming west southwest in the afternoon.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Mostly cloudy, with a low around 32. South wind 5 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 32 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 60. Southwest wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 60 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. South southwest wind 5 to 7 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 70. South southwest wind around 7 mph.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48. South southwest wind around 5 mph.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 76. Southwest wind 5 to 7 mph.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 34. Northwest wind around 18 mph, with gusts as high as 30 mph.
Tonight
Partly cloudy, with a low around 18. Northwest wind 9 to 15 mph, with gusts as high as 23 mph.
Tuesday
Sunny, with a high near 38. Northwest wind 6 to 8 mph becoming west southwest in the afternoon.
Tuesday Night
A slight chance of snow showers between 1am and 4am, then a slight chance of rain showers after 4am. Mostly cloudy, with a low around 32. South wind 5 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Wednesday
Mostly sunny, with a high near 60. Southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 43. South southwest wind 5 to 7 mph.
Thursday
Sunny, with a high near 70. South southwest wind around 7 mph.
Thursday Night
Mostly clear, with a low around 48. South southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 76. Southwest wind 5 to 7 mph.
Friday Night
Partly cloudy, with a low around 53. South southwest wind around 6 mph.
Saturday
Sunny, with a high near 78. West southwest wind 7 to 9 mph.
Saturday Night
Mostly clear, with a low around 52. Southwest wind 6 to 8 mph.
Sunday
Sunny, with a high near 73. Southwest wind 8 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
1:57 pm CDT Mar 16, 2026
Forecast Valid:
3pm CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation