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.

Fair

40°F

4°C

Humidity 79%
Wind Speed SW 9 mph
Barometer 30.19 in (1022.6 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 3 Nov 1:54 am CST
Extended Forecast for

2 Miles WNW Decatur IL

  • Overnight

    Overnight: Mostly clear, with a low around 36. South southwest wind around 10 mph, with gusts as high as 17 mph.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 62. Southwest wind 8 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 62 °F

    Sunny

  • Monday Night

    Monday Night: 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 13 to 18 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 22 mph.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 70. Southwest wind 10 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 38. North northwest wind 5 to 8 mph becoming east after midnight.

    Low: 38 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64.

    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

Detailed Forecast

Overnight
Mostly clear, with a low around 36. South southwest wind around 10 mph, with gusts as high as 17 mph.
Monday
Sunny, with a high near 62. Southwest wind 8 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Monday Night
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 13 to 18 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 22 mph.
Wednesday
Sunny, with a high near 70. Southwest wind 10 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 38. North northwest wind 5 to 8 mph becoming east after midnight.
Thursday
Sunny, with a high near 64.
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 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Decatur IL
 39.86°N 88.97°W (Elev. 676 ft)
Last Update:
2:11 am CST Nov 3, 2025
Forecast Valid:
2am CST Nov 3, 2025-6pm CST Nov 9, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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