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.

Fair

52°F

11°C

Humidity 80%
Wind Speed SW 10 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 9 Mar 2:52 am CDT
Extended Forecast for

Anna IL

  • Overnight

    Overnight: Mostly clear, with a low around 48. South southwest wind around 7 mph.

    Low: 48 °F

    Mostly Clear

  • Monday

    Monday: Areas of fog between 8am and 10am. Otherwise, partly sunny, with a high near 71. South southwest wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Areas Fog
    then Partly
    Sunny

  • Monday Night

    Monday Night: Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 62. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.

    Low: 62 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog between 8am and 10am. Otherwise, mostly cloudy, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.

    High: 77 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 64. South southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    Low: 64 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 70. South southwest wind around 17 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.

    High: 70 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy, with a north northwest wind 11 to 20 mph, with gusts as high as 29 mph.

    Low: 35 °F

    Slight Chance
    Showers and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 53. North wind 6 to 8 mph becoming south southwest in the afternoon.

    High: 53 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. South wind 6 to 14 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 48. South southwest wind around 7 mph.
Monday
Areas of fog between 8am and 10am. Otherwise, partly sunny, with a high near 71. South southwest wind 8 to 15 mph, with gusts as high as 25 mph.
Monday Night
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 62. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog between 8am and 10am. Otherwise, mostly cloudy, with a high near 77. South southwest wind 8 to 15 mph, with gusts as high as 24 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 64. South southwest wind around 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm. High near 70. South southwest wind around 17 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy, with a north northwest wind 11 to 20 mph, with gusts as high as 29 mph.
Thursday
Sunny, with a high near 53. North wind 6 to 8 mph becoming south southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 41. South wind 6 to 14 mph, with gusts as high as 24 mph.
Friday
Partly sunny, with a high near 65. Southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 41. Northwest wind around 6 mph becoming east after midnight.
Saturday
Sunny, with a high near 67. East southeast wind 7 to 11 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 52. South wind 9 to 11 mph, with gusts as high as 22 mph.
Sunday
A chance of showers. Mostly cloudy, with a high near 70. South southwest wind 14 to 17 mph, with gusts as high as 28 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:
1:26 am CDT Mar 9, 2026
Forecast Valid:
3am CDT Mar 9, 2026-6pm CDT Mar 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