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.

Fog/Mist

27°F

-3°C

Humidity 89%
Wind Speed SW 6 mph
Barometer 29.90 in (1012.9 mb)
Dewpoint 24°F (-4°C)
Visibility 6.00 mi
Wind Chill20°F (-7°C)
Last update 6 Feb 1:52 am CST
Extended Forecast for

Anna IL

  • Overnight

    Overnight: Partly cloudy, with a low around 27. West southwest wind around 6 mph.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 48. West southwest wind 6 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 48 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 23. North northwest wind 8 to 10 mph.

    Low: 23 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 36. North northeast wind 5 to 8 mph becoming calm in the afternoon.

    High: 36 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24. Calm wind becoming south southeast around 6 mph in the evening.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 48. South southwest wind 5 to 9 mph.

    High: 48 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. Light south wind.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58. Light west southwest wind.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. South wind 3 to 6 mph.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 27. West southwest wind around 6 mph.
Friday
Mostly sunny, with a high near 48. West southwest wind 6 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Partly cloudy, with a low around 23. North northwest wind 8 to 10 mph.
Saturday
Sunny, with a high near 36. North northeast wind 5 to 8 mph becoming calm in the afternoon.
Saturday Night
Mostly cloudy, with a low around 24. Calm wind becoming south southeast around 6 mph in the evening.
Sunday
Mostly sunny, with a high near 48. South southwest wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 34. Light south wind.
Monday
Sunny, with a high near 58. Light west southwest wind.
Monday Night
Partly cloudy, with a low around 42. South wind 3 to 6 mph.
Tuesday
A chance of showers. Mostly cloudy, with a high near 64. South southwest wind 6 to 9 mph.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 42. Southwest wind around 8 mph becoming northwest after midnight.
Wednesday
A slight chance of showers. Mostly cloudy, with a high near 53. North northwest wind 7 to 9 mph.
Wednesday Night
A slight chance of showers. Mostly cloudy, with a low around 33. North wind around 6 mph.
Thursday
A slight chance of showers. Mostly cloudy, with a high near 46. North wind around 7 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:
12:46 am CST Feb 6, 2026
Forecast Valid:
2am CST Feb 6, 2026-6pm CST Feb 12, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation