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

39°F

4°C

Humidity 67%
Wind Speed S 14 mph
Barometer 29.99 in (1015.9 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 13 Jan 6:52 am CST
Extended Forecast for

3 Miles NNW Royalton IL

  • Today

    Today: Partly sunny, with a high near 61. Southwest wind 8 to 15 mph, with gusts as high as 28 mph.

    High: 61 °F

    Partly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers, mainly before 1am. Cloudy, with a low around 40. Southwest wind 6 to 8 mph becoming northwest after midnight.

    Low: 40 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a temperature falling to around 33 by 5pm. North northwest wind 8 to 18 mph, with gusts as high as 28 mph.

    High: 45 °F⇓

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 18. North northwest wind 8 to 18 mph, with gusts as high as 25 mph.

    Low: 18 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 32. Northwest wind 5 to 8 mph becoming south southwest in the afternoon.

    High: 32 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. South wind 5 to 14 mph, with gusts as high as 23 mph.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 45. West wind 13 to 18 mph, with gusts as high as 25 mph.

    High: 45 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. West wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 33. West northwest wind 10 to 15 mph, with gusts as high as 22 mph.

    High: 33 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 61. Southwest wind 8 to 15 mph, with gusts as high as 28 mph.
Tonight
A 40 percent chance of showers, mainly before 1am. Cloudy, with a low around 40. Southwest wind 6 to 8 mph becoming northwest after midnight.
Wednesday
Partly sunny, with a temperature falling to around 33 by 5pm. North northwest wind 8 to 18 mph, with gusts as high as 28 mph.
Wednesday Night
Mostly clear, with a low around 18. North northwest wind 8 to 18 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 32. Northwest wind 5 to 8 mph becoming south southwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 24. South wind 5 to 14 mph, with gusts as high as 23 mph.
Friday
Partly sunny, with a high near 45. West wind 13 to 18 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around 22. West wind 9 to 11 mph, with gusts as high as 20 mph.
Saturday
Partly sunny, with a high near 33. West northwest wind 10 to 15 mph, with gusts as high as 22 mph.
Saturday Night
Mostly cloudy, with a low around 11. West northwest wind around 10 mph.
Sunday
Mostly sunny, with a high near 27. West northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 12. West wind around 8 mph.
M.L.King Day
Sunny, with a high near 35. West wind 7 to 11 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:
6:56 am CST Jan 13, 2026
Forecast Valid:
7am CST Jan 13, 2026-6pm CST Jan 19, 2026
 
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Additional Resources

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