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

46°F

8°C

Humidity 100%
Wind Speed S 3 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 7 Oct 4:52 am CDT
Extended Forecast for

3 Miles NW Royalton IL

  • Today

    Today: Sunny, with a high near 87. Calm wind becoming west southwest 5 to 8 mph in the morning.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 56. Light and variable wind.

    Low: 56 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming north around 5 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Calm wind.

    Low: 53 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86. Calm wind becoming south southeast 5 to 8 mph in the morning.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. Light south southeast wind.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 84. Light south wind becoming south southeast 6 to 11 mph in the morning.

    High: 84 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 58. East southeast wind 6 to 8 mph.

    Low: 58 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, mainly before 1pm. Partly sunny, with a high near 77. East northeast wind 9 to 13 mph becoming north northwest in the afternoon.

    High: 77 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 87. Calm wind becoming west southwest 5 to 8 mph in the morning.
Tonight
Mostly clear, with a low around 56. Light and variable wind.
Thursday
Sunny, with a high near 85. Calm wind becoming north around 5 mph.
Thursday Night
Clear, with a low around 53. Calm wind.
Friday
Sunny, with a high near 86. Calm wind becoming south southeast 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 59. Light south southeast wind.
Saturday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 84. Light south wind becoming south southeast 6 to 11 mph in the morning.
Saturday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 58. East southeast wind 6 to 8 mph.
Sunday
A chance of showers, mainly before 1pm. Partly sunny, with a high near 77. East northeast wind 9 to 13 mph becoming north northwest in the afternoon.
Sunday Night
Partly cloudy, with a low around 57. North wind around 5 mph becoming calm in the evening.
Columbus Day
Mostly sunny, with a high near 82. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 58. South wind around 5 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 82. Southwest wind 5 to 13 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Royalton IL
 37.92°N 89.16°W
Last Update:
3:36 am CDT Oct 7, 2026
Forecast Valid:
5am CDT Oct 7, 2026-6pm CDT Oct 13, 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