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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Fair

68°F

20°C

Humidity 80%
Wind Speed Calm
Barometer 30.18 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 28 Aug 8:35 am CDT
Extended Forecast for

Sycamore IL

  • Today

    Today: Sunny, with a high near 81. Calm wind becoming west southwest around 5 mph in the morning.

    High: 81 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. South wind around 5 mph.

    Low: 60 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 79. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 79 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 86. South wind around 15 mph, with gusts as high as 25 mph.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy
    then Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 81. Calm wind becoming west southwest around 5 mph in the morning.
Tonight
Mostly clear, with a low around 60. South wind around 5 mph.
Saturday
Partly sunny, with a high near 79. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 66. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 86. South wind around 15 mph, with gusts as high as 25 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 86.
Monday Night
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 70.
Wednesday
Mostly sunny, with a high near 88.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sycamore IL
 41.98°N 88.7°W
Last Update:
1:21 am CDT Aug 28, 2026
Forecast Valid:
8am CDT Aug 28, 2026-6pm CDT Sep 3, 2026
 
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Additional Resources

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Chance of Precipitation