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

64°F

18°C

Humidity 78%
Wind Speed W 12 G 23 mph
Barometer 29.82 in (1009.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 May 6:54 am CDT
Extended Forecast for

Decatur IL

  • Today

    Today: Mostly sunny, with a high near 76. West wind 9 to 11 mph, with gusts as high as 17 mph.

    High: 76 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers after 4am. Mostly clear, with a low around 56. West northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Sunny, with a high near 80. Light and variable wind becoming southeast 5 to 7 mph in the morning.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am. Mostly clear, with a low around 64. Southeast wind around 7 mph.

    Low: 64 °F

    Mostly Clear
    then Chance
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. South wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 59. South wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.

    Low: 59 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 78. Northwest wind 7 to 9 mph, with gusts as high as 15 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.

    High: 78 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 76. West wind 9 to 11 mph, with gusts as high as 17 mph.
Tonight
A 20 percent chance of showers after 4am. Mostly clear, with a low around 56. West northwest wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 80. Light and variable wind becoming southeast 5 to 7 mph in the morning.
Thursday Night
A 30 percent chance of showers after 1am. Mostly clear, with a low around 64. Southeast wind around 7 mph.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. South wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A 50 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 59. South wind around 10 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.
Saturday
Sunny, with a high near 78. Northwest wind 7 to 9 mph, with gusts as high as 15 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 58. Chance of precipitation is 60%.
Memorial Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 73.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Tuesday
A chance of showers. Mostly sunny, with a high near 72.
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
6:58 am CDT May 22, 2024
Forecast Valid:
7am CDT May 22, 2024-6pm CDT May 28, 2024
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation