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

Hazardous Weather Conditions

Current conditions at

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Fair

70°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 29.91 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 12 Aug 10:55 pm CDT
Extended Forecast for

Sycamore IL

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 68. Southeast wind around 5 mph becoming calm.

    Low: 68 °F

    Patchy Fog

  • Thursday

    Thursday: A slight chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 76. East wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Chance
    Showers and
    Patchy Fog
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 83.

    High: 83 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 70.

    Low: 70 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 68. Southeast wind around 5 mph becoming calm.
Thursday
A slight chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 76. East wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. East wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 83.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 70.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82.
Sunday Night
Mostly cloudy, with a low around 64.
Monday
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 63.
Wednesday
Partly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sycamore IL
 41.98°N 88.7°W
Last Update:
9:46 pm CDT Aug 12, 2026
Forecast Valid:
11pm CDT Aug 12, 2026-6pm CDT Aug 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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