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

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Fair

66°F

19°C

Humidity 94%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 64°F (18°C)
Visibility 7.00 mi
Last update 15 Jul 1:35 am CDT
Extended Forecast for

De Kalb IL

  • Overnight

    Overnight: Mostly clear, with a low around 65. Southeast wind around 5 mph becoming calm.

    Low: 65 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. South wind around 5 mph.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 70. South wind around 5 mph.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Heat index values as high as 98. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 89 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 69. Southwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.

    Low: 69 °F

    T-storms
    Likely

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 78.

    High: 78 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms

  • Friday

    Friday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 65. Southeast wind around 5 mph becoming calm.
Tuesday
Sunny, with a high near 88. South wind around 5 mph.
Tuesday Night
Partly cloudy, with a low around 70. South wind around 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Heat index values as high as 98. Southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 69. Southwest wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly cloudy, with a high near 78.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 80.
Friday Night
Partly cloudy, with a low around 64.
Saturday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 84.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 84.
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ABOUT THIS FORECAST

 
Point Forecast:
De Kalb IL
 41.92°N 88.76°W
Last Update:
12:57 am CDT Jul 15, 2025
Forecast Valid:
1am CDT Jul 15, 2025-6pm CDT Jul 21, 2025
 
Forecast Discussion
 
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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