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

48°F

9°C

Humidity 66%
Wind Speed N 7 mph
Barometer 29.91 in (1013.3 mb)
Dewpoint 37°F (3°C)
Visibility 9.00 mi
Wind Chill45°F (7°C)
Last update 1 Jan 2:52 pm CST
Extended Forecast for

Anna IL

  • New Year's Day

    New Year's Day: Sunny, with a high near 51. Calm wind.

    High: 51 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 32. Light northeast wind.

    Low: 32 °F

    Mostly Cloudy

  • Friday

    Friday: Cloudy, with a high near 41. Northeast wind around 6 mph.

    High: 41 °F

    Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of showers before midnight. Cloudy, with a low around 30. North northeast wind around 6 mph.

    Low: 30 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 41. North northeast wind around 7 mph.

    High: 41 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. North wind around 5 mph becoming calm in the evening.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 42. Calm wind.

    High: 42 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 31 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 53. South southwest wind 7 to 10 mph, with gusts as high as 20 mph.

    High: 53 °F

    Mostly Sunny

Detailed Forecast

New Year's Day
Sunny, with a high near 51. Calm wind.
Tonight
Mostly cloudy, with a low around 32. Light northeast wind.
Friday
Cloudy, with a high near 41. Northeast wind around 6 mph.
Friday Night
A 20 percent chance of showers before midnight. Cloudy, with a low around 30. North northeast wind around 6 mph.
Saturday
Partly sunny, with a high near 41. North northeast wind around 7 mph.
Saturday Night
Mostly clear, with a low around 26. North wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 42. Calm wind.
Sunday Night
Partly cloudy, with a low around 31. Calm wind becoming south 5 to 7 mph after midnight.
Monday
Mostly sunny, with a high near 53. South southwest wind 7 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 44. South wind 7 to 9 mph.
Tuesday
Partly sunny, with a high near 62. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 42. South southwest wind 5 to 7 mph becoming northwest after midnight.
Wednesday
Mostly cloudy, with a high near 58. North northwest wind around 6 mph becoming south southeast in the afternoon.
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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:
3:06 pm CST Jan 1, 2026
Forecast Valid:
3pm CST Jan 1, 2026-6pm CST Jan 7, 2026
 
Forecast Discussion
 
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Additional Resources

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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