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

36°F

2°C

Humidity 48%
Wind Speed Calm
Barometer 30.53 in (1034.0 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Last update 11 Jan 4:52 pm CST
Extended Forecast for

Carbondale IL

  • Tonight

    Tonight: Clear, with a low around 25. Calm wind becoming south southwest around 6 mph after midnight.

    Low: 25 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 50. Southwest wind 7 to 10 mph.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35. South southwest wind 6 to 8 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 41. Southwest wind 6 to 10 mph becoming west northwest after midnight.

    Low: 41 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers. Mostly cloudy, with a high near 46. Northwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.

    High: 46 °F

    Slight Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 19. North northwest wind 14 to 18 mph, with gusts as high as 29 mph.

    Low: 19 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 34. North northwest wind 5 to 13 mph, with gusts as high as 22 mph.

    High: 34 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 26. South southwest wind 3 to 8 mph.

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 25. Calm wind becoming south southwest around 6 mph after midnight.
Monday
Sunny, with a high near 50. Southwest wind 7 to 10 mph.
Monday Night
Mostly clear, with a low around 35. South southwest wind 6 to 8 mph.
Tuesday
Mostly sunny, with a high near 58. Southwest wind 9 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 41. Southwest wind 6 to 10 mph becoming west northwest after midnight.
Wednesday
A 20 percent chance of showers. Mostly cloudy, with a high near 46. Northwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 29 mph.
Wednesday Night
Mostly cloudy, with a low around 19. North northwest wind 14 to 18 mph, with gusts as high as 29 mph.
Thursday
Sunny, with a high near 34. North northwest wind 5 to 13 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 26. South southwest wind 3 to 8 mph.
Friday
Partly sunny, with a high near 44. West southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 25. West wind around 7 mph.
Saturday
Partly sunny, with a high near 35. West northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 18. West northwest wind 5 to 7 mph.
Sunday
Sunny, with a high near 33. West wind 6 to 10 mph, with gusts as high as 18 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Carbondale IL
 37.72°N 89.2°W
Last Update:
3:17 pm CST Jan 11, 2026
Forecast Valid:
5pm CST Jan 11, 2026-6pm CST Jan 18, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation