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.

Fog/Mist

38°F

3°C

Humidity 86%
Wind Speed SW 5 mph
Barometer 30.19 in (1022.6 mb)
Dewpoint 34°F (1°C)
Visibility 5.00 mi
Wind Chill34°F (1°C)
Last update 7 Nov 8:54 pm CST
Extended Forecast for

4 Miles WSW Monticello IL

  • Tonight

    Tonight: Increasing clouds, with a low around 31. Southwest wind 5 to 8 mph.

    Low: 31 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 60. West wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 60 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33. West wind 5 to 8 mph becoming calm after midnight.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 62. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 62 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 41. Southwest wind 6 to 8 mph.

    Low: 41 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. West wind around 6 mph.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39. Light west northwest wind.

    Low: 39 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: A 30 percent chance of rain after noon. Mostly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 31. Southwest wind 5 to 8 mph.
Sunday
Sunny, with a high near 60. West wind 8 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 33. West wind 5 to 8 mph becoming calm after midnight.
Monday
Partly sunny, then gradually becoming sunny, with a high near 62. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Monday Night
Clear, with a low around 41. Southwest wind 6 to 8 mph.
Tuesday
Sunny, with a high near 66. West wind around 6 mph.
Tuesday Night
Mostly clear, with a low around 39. Light west northwest wind.
Veterans Day
A 30 percent chance of rain after noon. Mostly sunny, with a high near 62.
Wednesday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 38.
Thursday
Mostly sunny, with a high near 52.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Mostly sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 29.
Saturday
Sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Monticello IL
 40.01°N 88.64°W (Elev. 656 ft)
Last Update:
7:11 pm CST Nov 7, 2026
Forecast Valid:
9pm CST Nov 7, 2026-6pm CST Nov 14, 2026
 
Forecast Discussion
 
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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