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

78°F

26°C

Humidity 32%
Wind Speed S 6 mph
Barometer 30.02 in (1016.4 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 6 Oct 2:52 pm CDT
Extended Forecast for

Anna IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 75. Calm wind.

    High: 75 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 52. Calm wind.

    Low: 52 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming north around 5 mph in the morning.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 56. Light northeast wind.

    Low: 56 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 82. East southeast wind 3 to 6 mph.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. Light east southeast wind.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers after 1pm. Mostly sunny, with a high near 84. Light southeast wind becoming south southeast 5 to 9 mph in the morning.

    High: 84 °F

    Sunny then
    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 75. Calm wind.
Tonight
Clear, with a low around 52. Calm wind.
Wednesday
Sunny, with a high near 83. Calm wind becoming west southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 84. Calm wind becoming north around 5 mph in the morning.
Thursday Night
Clear, with a low around 56. Light northeast wind.
Friday
Sunny, with a high near 82. East southeast wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 58. Light east southeast wind.
Saturday
A slight chance of showers after 1pm. Mostly sunny, with a high near 84. Light southeast wind becoming south southeast 5 to 9 mph in the morning.
Saturday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 59. East southeast wind around 6 mph.
Sunday
A chance of showers. Partly sunny, with a high near 75. East wind 5 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 57. Light west northwest wind.
Columbus Day
Mostly sunny, with a high near 80. Calm wind becoming north northwest around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Anna IL
 37.45°N 89.24°W
Last Update:
1:16 pm CDT Oct 6, 2026
Forecast Valid:
3pm CDT Oct 6, 2026-6pm CDT Oct 12, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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