National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

58°F

14°C

Humidity 75%
Wind Speed W 12 mph
Barometer 29.76 in (1007.6 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 4 Nov 1:54 pm CST
Extended Forecast for

Blue Mound IL

  • This Afternoon

    This Afternoon: A slight chance of drizzle. Mostly cloudy, with a high near 59. West southwest wind 10 to 15 mph, with gusts as high as 21 mph.

    High: 59 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: Patchy drizzle, mainly between 7pm and 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 45. West southwest wind 7 to 10 mph, with gusts as high as 15 mph.

    Low: 45 °F

    Patchy
    Drizzle then
    Mostly Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 59. West southwest wind 9 to 15 mph, with gusts as high as 21 mph.

    High: 59 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. West wind 6 to 10 mph becoming north after midnight.

    Low: 41 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 52. North northwest wind 9 to 13 mph, with gusts as high as 18 mph.

    High: 52 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 30. North wind 5 to 7 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 53. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of drizzle. Mostly cloudy, with a high near 59. West southwest wind 10 to 15 mph, with gusts as high as 21 mph.
Tonight
Patchy drizzle, mainly between 7pm and 10pm. Cloudy, then gradually becoming partly cloudy, with a low around 45. West southwest wind 7 to 10 mph, with gusts as high as 15 mph.
Thursday
Increasing clouds, with a high near 59. West southwest wind 9 to 15 mph, with gusts as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around 41. West wind 6 to 10 mph becoming north after midnight.
Friday
Partly sunny, with a high near 52. North northwest wind 9 to 13 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 30. North wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 53. Calm wind becoming northwest around 6 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 30.
Sunday
Sunny, with a high near 59.
Sunday Night
Mostly clear, with a low around 33.
Monday
Sunny, with a high near 64.
Monday Night
Clear, with a low around 38.
Tuesday
Sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Blue Mound IL
 39.69°N 89.12°W (Elev. 614 ft)
Last Update:
2:21 pm CST Nov 4, 2026
Forecast Valid:
2pm CST Nov 4, 2026-6pm CST Nov 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation