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

68°F

20°C

Humidity 78%
Wind Speed SW 9 mph
Barometer 29.79 in (1008.4 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 26 Dec 11:52 am CST
Extended Forecast for

Anna ILSimilar City Names

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 71. West southwest wind 6 to 10 mph becoming north northwest.

    High: 71 °F

    Partly Sunny

  • Tonight

    Tonight: Widespread dense fog, mainly after 4am. Otherwise, partly cloudy, with a low around 49. North northwest wind around 6 mph becoming east after midnight.

    Low: 49 °F

    Partly Cloudy
    then Dense
    Fog

  • Saturday

    Saturday: Widespread fog, mainly before 8am. Otherwise, partly sunny, with a high near 67. East wind 5 to 9 mph becoming south in the afternoon.

    High: 67 °F

    Fog then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 63. South southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 63 °F

    Cloudy

  • Sunday

    Sunday: Showers likely, mainly after noon. Cloudy, with a high near 71. South southwest wind 11 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    High: 71 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Rain showers before midnight, then a chance of rain and snow showers. Low around 26. Southwest wind 15 to 18 mph becoming northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.

    Low: 26 °F

    Showers then
    Chance
    Rain/Snow

  • Monday

    Monday: Sunny, with a high near 30. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 30 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. North northwest wind 6 to 13 mph, with gusts as high as 21 mph.

    Low: 19 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 35. Northwest wind around 7 mph becoming southwest in the afternoon.

    High: 35 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 71. West southwest wind 6 to 10 mph becoming north northwest.
Tonight
Widespread dense fog, mainly after 4am. Otherwise, partly cloudy, with a low around 49. North northwest wind around 6 mph becoming east after midnight.
Saturday
Widespread fog, mainly before 8am. Otherwise, partly sunny, with a high near 67. East wind 5 to 9 mph becoming south in the afternoon.
Saturday Night
Cloudy, with a low around 63. South southwest wind around 10 mph, with gusts as high as 20 mph.
Sunday
Showers likely, mainly after noon. Cloudy, with a high near 71. South southwest wind 11 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Sunday Night
Rain showers before midnight, then a chance of rain and snow showers. Low around 26. Southwest wind 15 to 18 mph becoming northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.
Monday
Sunny, with a high near 30. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 19. North northwest wind 6 to 13 mph, with gusts as high as 21 mph.
Tuesday
Sunny, with a high near 35. Northwest wind around 7 mph becoming southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 25. West southwest wind around 6 mph.
Wednesday
Mostly sunny, with a high near 42. West wind 5 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 23. North northwest wind around 6 mph.
New Year's Day
Partly sunny, with a high near 36. North northwest wind 6 to 8 mph becoming west southwest in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Anna ILSimilar City Names
 37.45°N 89.24°W
Last Update:
8:46 am CST Dec 26, 2025
Forecast Valid:
12pm CST Dec 26, 2025-6pm CST Jan 1, 2026
 
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