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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Anna IL

  • Overnight

    Overnight: A 20 percent chance of showers before 3am. Mostly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 90. Light south southwest wind.

    High: 90 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Patchy fog after 3am. Otherwise, mostly clear, with a low around 70. Calm wind.

    Low: 70 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Calm wind becoming south 5 to 8 mph in the morning.

    High: 91 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South wind 3 to 6 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 93. South southwest wind 5 to 10 mph.

    High: 93 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South southwest wind 6 to 8 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Southwest wind 7 to 10 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75. South southwest wind 7 to 9 mph.

    Low: 75 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
A 20 percent chance of showers before 3am. Mostly cloudy, with a low around 71. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 90. Light south southwest wind.
Saturday Night
Patchy fog after 3am. Otherwise, mostly clear, with a low around 70. Calm wind.
Sunday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 91. Calm wind becoming south 5 to 8 mph in the morning.
Sunday Night
Mostly clear, with a low around 72. South wind 3 to 6 mph.
Monday
Sunny, with a high near 93. South southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 75. South southwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 94. Southwest wind 7 to 10 mph.
Tuesday Night
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75. South southwest wind 7 to 9 mph.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 93. Southwest wind 7 to 9 mph.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 6 to 9 mph.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind around 7 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South southwest wind around 5 mph becoming light and variable.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. 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 89.22°W
Last Update:
1:46 am CDT Aug 8, 2026
Forecast Valid:
2am CDT Aug 8, 2026-6pm CDT Aug 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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