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.

Mostly Cloudy

48°F

9°C

Humidity 82%
Wind Speed S 8 mph
Barometer 30.11 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 1 Nov 2:52 pm CDT
Extended Forecast for

3 Miles NNW Royalton IL

  • This Afternoon

    This Afternoon: Showers likely, mainly after 5pm. Mostly cloudy, with a steady temperature around 51. Southwest wind around 7 mph. Chance of precipitation is 60%.

    High: 51 °F

    Showers
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 7pm. Patchy frost after 2am. Otherwise, partly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Chance
    Showers then
    Patchy Frost

  • Sunday

    Sunday: Areas of frost before 9am. Otherwise, sunny, with a high near 56. North wind 3 to 6 mph.

    High: 56 °F

    Areas Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 35. Calm wind.

    Low: 35 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 62. Light southwest wind increasing to 5 to 9 mph in the morning.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66. Light south wind increasing to 8 to 13 mph in the morning.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 47. South southwest wind 7 to 9 mph.

    Low: 47 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 70. Southwest wind 9 to 11 mph becoming west northwest in the afternoon.

    High: 70 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely, mainly after 5pm. Mostly cloudy, with a steady temperature around 51. Southwest wind around 7 mph. Chance of precipitation is 60%.
Tonight
A 30 percent chance of showers, mainly before 7pm. Patchy frost after 2am. Otherwise, partly cloudy, with a low around 34. Calm wind.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 56. North wind 3 to 6 mph.
Sunday Night
Clear, with a low around 35. Calm wind.
Monday
Sunny, with a high near 62. Light southwest wind increasing to 5 to 9 mph in the morning.
Monday Night
Mostly clear, with a low around 39. Calm wind.
Tuesday
Mostly sunny, with a high near 66. Light south wind increasing to 8 to 13 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 47. South southwest wind 7 to 9 mph.
Wednesday
Sunny, with a high near 70. Southwest wind 9 to 11 mph becoming west northwest in the afternoon.
Wednesday Night
Mostly clear, with a low around 42. North northwest wind around 6 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 67. South southeast wind 5 to 11 mph.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 52. South wind around 10 mph.
Friday
A chance of showers. Mostly sunny, with a high near 70. South southwest wind 10 to 14 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Royalton IL
 37.92°N 89.13°W
Last Update:
2:26 pm CDT Nov 1, 2025
Forecast Valid:
3pm CDT Nov 1, 2025-6pm CST Nov 7, 2025
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation