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

53°F

12°C

Humidity 96%
Wind Speed Calm
Barometer 30.06 in (1017.8 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 8 Oct 6:52 am CDT
Extended Forecast for

3 Miles NNW Royalton IL

  • Today

    Today: Sunny, with a high near 85. Calm wind becoming east around 6 mph in the morning.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 54. Calm wind.

    Low: 54 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 88. Calm wind becoming south southeast 5 to 8 mph in the morning.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 60. Southeast wind 3 to 5 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 81. Light south southeast wind becoming east southeast 6 to 11 mph in the morning.

    High: 81 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers, with thunderstorms also possible after 1am. Low around 58. East wind 11 to 15 mph. Chance of precipitation is 80%.

    Low: 58 °F

    Showers

  • Sunday

    Sunday: A 50 percent chance of showers before 1pm. Partly sunny, with a high near 75. East northeast wind around 11 mph becoming northwest in the afternoon.

    High: 75 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. Calm wind.

    Low: 56 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 86. Light south southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 86 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 85. Calm wind becoming east around 6 mph in the morning.
Tonight
Clear, with a low around 54. Calm wind.
Friday
Sunny, with a high near 88. Calm wind becoming south southeast 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 60. Southeast wind 3 to 5 mph.
Saturday
A 40 percent chance of showers after 1pm. Partly sunny, with a high near 81. Light south southeast wind becoming east southeast 6 to 11 mph in the morning.
Saturday Night
Showers, with thunderstorms also possible after 1am. Low around 58. East wind 11 to 15 mph. Chance of precipitation is 80%.
Sunday
A 50 percent chance of showers before 1pm. Partly sunny, with a high near 75. East northeast wind around 11 mph becoming northwest in the afternoon.
Sunday Night
Mostly clear, with a low around 56. Calm wind.
Columbus Day
Sunny, with a high near 86. Light south southwest wind increasing to 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 61. West southwest wind around 8 mph.
Tuesday
A slight chance of showers. Sunny, with a high near 79. Northwest wind 9 to 13 mph.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 52. North wind 5 to 8 mph.
Wednesday
Sunny, with a high near 75. Northeast wind 5 to 8 mph becoming east southeast in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Royalton IL
 37.92°N 89.13°W
Last Update:
5:21 am CDT Oct 8, 2026
Forecast Valid:
6am CDT Oct 8, 2026-6pm CDT Oct 14, 2026
 
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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