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

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

51°F

11°C

Humidity 64%
Wind Speed W 10 mph
Barometer 30.23 in (1024.0 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 3 Nov 9:54 am CST
Extended Forecast for

Decatur IL

  • Today

    Today: Sunny, with a high near 62. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 62 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 37. West northwest wind around 6 mph becoming calm in the evening.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 66. Light south southeast wind becoming south 12 to 17 mph in the morning. Winds could gust as high as 26 mph.

    High: 66 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51. South southwest wind 13 to 16 mph, with gusts as high as 21 mph.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. Southwest wind 9 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 38. North northwest wind 5 to 8 mph becoming light and variable.

    Low: 38 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64. South southeast wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: A 30 percent chance of rain before noon. Mostly sunny, with a high near 68.

    High: 68 °F

    Chance Rain
    then Mostly
    Sunny

Detailed Forecast

Today
Sunny, with a high near 62. Northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 37. West northwest wind around 6 mph becoming calm in the evening.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 66. Light south southeast wind becoming south 12 to 17 mph in the morning. Winds could gust as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 51. South southwest wind 13 to 16 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 70. Southwest wind 9 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 38. North northwest wind 5 to 8 mph becoming light and variable.
Thursday
Sunny, with a high near 64. South southeast wind 6 to 14 mph, with gusts as high as 22 mph.
Thursday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 52.
Friday
A 30 percent chance of rain before noon. Mostly sunny, with a high near 68.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.86°N 88.94°W (Elev. 682 ft)
Last Update:
9:36 am CST Nov 3, 2025
Forecast Valid:
10am CST Nov 3, 2025-6pm CST Nov 9, 2025
 
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