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

35°F

2°C

Humidity 61%
Wind Speed SE 12 mph
Barometer 30.31 in (1026.6 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 28 Nov 11:52 pm CST
Extended Forecast for

Anna IL

  • Overnight

    Overnight: A 40 percent chance of snow, mainly after 4am. Cloudy, with a low around 29. Southeast wind 5 to 7 mph.

    Low: 29 °F

    Chance Snow

  • Saturday

    Saturday: Snow likely before 10am, then rain and snow likely between 10am and noon, then rain after noon. High near 41. South wind 7 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Rain/Snow
    Likely then
    Rain

  • Saturday Night

    Saturday Night: Rain before midnight, then a slight chance of showers between midnight and 3am. Low around 26. South wind 11 to 15 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

    Low: 26 °F

    Rain then
    Slight Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 33. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 33 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 22. North wind around 7 mph.

    Low: 22 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 34. Northeast wind around 6 mph.

    High: 34 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • Monday Night

    Monday Night: Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 23. Calm wind becoming north northwest around 5 mph after midnight. Chance of precipitation is 60%.

    Low: 23 °F

    Snow Showers
    Likely

  • Tuesday

    Tuesday: Partly sunny, with a high near 32. North northwest wind 3 to 6 mph.

    High: 32 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 18. Calm wind.

    Low: 18 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 40 percent chance of snow, mainly after 4am. Cloudy, with a low around 29. Southeast wind 5 to 7 mph.
Saturday
Snow likely before 10am, then rain and snow likely between 10am and noon, then rain after noon. High near 41. South wind 7 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Saturday Night
Rain before midnight, then a slight chance of showers between midnight and 3am. Low around 26. South wind 11 to 15 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Sunday
Partly sunny, with a high near 33. Northwest wind 8 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 22. North wind around 7 mph.
Monday
A 20 percent chance of snow showers after noon. Mostly cloudy, with a high near 34. Northeast wind around 6 mph.
Monday Night
Snow showers likely, mainly before midnight. Mostly cloudy, with a low around 23. Calm wind becoming north northwest around 5 mph after midnight. Chance of precipitation is 60%.
Tuesday
Partly sunny, with a high near 32. North northwest wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 18. Calm wind.
Wednesday
Mostly sunny, with a high near 38. Calm wind becoming south southwest 5 to 7 mph in the morning.
Wednesday Night
Mostly cloudy, with a low around 23. Light and variable wind becoming northwest around 5 mph after midnight.
Thursday
Partly sunny, with a high near 36. North northwest wind around 6 mph.
Thursday Night
A slight chance of freezing rain. Mostly cloudy, with a low around 24. Light and variable wind becoming south southeast around 5 mph after midnight.
Friday
A slight chance of showers. Mostly cloudy, with a high near 40. South southwest wind 5 to 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:
10:26 pm CST Nov 28, 2025
Forecast Valid:
12am CST Nov 29, 2025-6pm CST Dec 5, 2025
 
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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