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

60°F

16°C

Humidity 72%
Wind Speed SW 8 mph
Barometer 29.87 in (1011.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 16 Jun 2:54 am CDT
Extended Forecast for

2 Miles SW Decatur IL

  • Overnight

    Overnight: Partly cloudy, with a low around 57. South southwest wind around 7 mph, with gusts as high as 15 mph.

    Low: 57 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Showers and thunderstorms, mainly before 3pm. High near 76. Southwest wind 9 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55. West northwest wind 6 to 11 mph becoming light and variable. Winds could gust as high as 21 mph.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly before 5pm. Partly sunny, with a high near 82. Breezy, with a south southeast wind 8 to 13 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    T-storms
    Likely and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 10pm, then showers between 10pm and 1am. Low around 64. Breezy, with a west southwest wind 14 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 64 °F

    T-storms and
    Breezy then
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 74. West northwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. West northwest wind 3 to 8 mph.

    Low: 56 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. South southwest wind around 7 mph, with gusts as high as 15 mph.
Tuesday
Showers and thunderstorms, mainly before 3pm. High near 76. Southwest wind 9 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Partly cloudy, with a low around 55. West northwest wind 6 to 11 mph becoming light and variable. Winds could gust as high as 21 mph.
Wednesday
Showers and thunderstorms likely, mainly before 5pm. Partly sunny, with a high near 82. Breezy, with a south southeast wind 8 to 13 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and thunderstorms before 10pm, then showers between 10pm and 1am. Low around 64. Breezy, with a west southwest wind 14 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
Mostly sunny, with a high near 74. West northwest wind 11 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Mostly clear, with a low around 56. West northwest wind 3 to 8 mph.
Juneteenth
Sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 58.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
A chance of showers. Partly cloudy, with a low around 63.
Sunday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 81.
Sunday Night
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 65.
Monday
A chance of showers. Partly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Decatur IL
 39.84°N 88.97°W (Elev. 676 ft)
Last Update:
1:26 am CDT Jun 16, 2026
Forecast Valid:
3am CDT Jun 16, 2026-6pm CDT Jun 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation