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

50°F

10°C

Humidity 50%
Wind Speed N 6 mph
Barometer 30.08 in (1019.0 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 9 Feb 1:52 pm CST
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 55. Calm wind.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Calm wind becoming south southwest 5 to 7 mph in the evening.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 63. South southwest wind 8 to 10 mph becoming north northwest in the afternoon.

    High: 63 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 32. North wind 7 to 9 mph.

    Low: 32 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 49. North wind 5 to 7 mph.

    High: 49 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 30. Light and variable wind.

    Low: 30 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 47. Calm wind becoming east southeast around 6 mph in the afternoon.

    High: 47 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly cloudy, with a low around 33. East wind 3 to 5 mph.

    Low: 33 °F

    Slight Chance
    Showers

  • Friday

    Friday: A slight chance of showers. Mostly cloudy, with a high near 48. East wind 3 to 6 mph.

    High: 48 °F

    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 55. Calm wind.
Tonight
Partly cloudy, with a low around 40. Calm wind becoming south southwest 5 to 7 mph in the evening.
Tuesday
Partly sunny, with a high near 63. South southwest wind 8 to 10 mph becoming north northwest in the afternoon.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 32. North wind 7 to 9 mph.
Wednesday
Sunny, with a high near 49. North wind 5 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 30. Light and variable wind.
Thursday
Mostly cloudy, with a high near 47. Calm wind becoming east southeast around 6 mph in the afternoon.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 33. East wind 3 to 5 mph.
Friday
A slight chance of showers. Mostly cloudy, with a high near 48. East wind 3 to 6 mph.
Friday Night
A chance of showers, mainly after midnight. Mostly cloudy, with a low around 37. East wind 5 to 7 mph.
Saturday
Showers likely. Mostly cloudy, with a high near 49. East wind 7 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Showers. Mostly cloudy, with a low around 40. East wind around 11 mph becoming north after midnight. Winds could gust as high as 20 mph.
Sunday
A chance of showers. Partly sunny, with a high near 52. North northwest wind 9 to 13 mph, with gusts as high as 21 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
1:17 pm CST Feb 9, 2026
Forecast Valid:
2pm CST Feb 9, 2026-6pm CST Feb 15, 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