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DeKalb, IL Weather Forecast

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DeKalb IL weather - Clear - 57°F
Clear
57°F
Updated 6:38 am
Feels Like 56°F
Humidity 100%
Wind E 3 mph
Barometer  30.17 in
Dew Point 57°F
DeKalb IL weather - Clear - 14°C
Clear
14°C
Updated 6:38 am
Feels Like 13°C
Humidity 100%
Wind E 5 km/h
Barometer  102.1 kPa
Dew Point 14°C
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DeKalb Weather Forecast

REST OF TONIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY
DeKalb, IL Weather - Rest Of Tonight Partly Cloudy DeKalb, IL Weather - Monday Partly Cloudy DeKalb, IL Weather - Monday Night Partly Cloudy DeKalb, IL Weather - Tuesday Partly Cloudy DeKalb, IL Weather - Tuesday Night Chance Of T-Storm DeKalb, IL Weather - Wednesday Chance Of T-Storm DeKalb, IL Weather - Wednesday Night Partly Cloudy DeKalb, IL Weather - Thursday Partly Cloudy DeKalb, IL Weather - Thursday Night Clear DeKalb, IL Weather - Friday Partly Cloudy DeKalb, IL Weather - Friday Night Chance Of Showers DeKalb, IL Weather - Saturday Partly Cloudy
Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Chance of T-Storm Chance of T-Storm Partly Cloudy Partly Cloudy Clear Partly Cloudy Chance of Showers Partly Cloudy
Lo: 59°FLo: 15°C Hi: 80°FHi: 27°C
 Lo: 60°FLo: 16°C Hi: 85°FHi: 29°C
 Lo: 70°FLo: 21°C Hi: 81°FHi: 27°C
 Lo: 59°FLo: 15°C Hi: 79°FHi: 26°C
 Lo: 55°FLo: 13°C Hi: 81°FHi: 27°C
 Lo: 61°FLo: 16°C Hi: 85°FHi: 29°C
POP: 50% POP: 80% POP: 30%
POP = Probability of Precipitation.
Weather Outlook Updated: 120 AM CDT Mon Sep 07 2026 DeKalb, IL Weather - WeatherWorld.com

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Issued: 257 AM CDT Mon Sep 7 2026

Key Messages

  • Seasonably warm today for Labor Day with mostly sunny skies and no rain in the forecast.
  • Rain and thunderstorm chances return to the forecast Tuesday night and Wednesday.

Discussion

... Issued at 256 AM CDT Mon Sep 7 2026

Our Labor Day is off to a quiet start. Temperatures are slowly falling through the 60s and blowoff cirrus is scooting overhead from decaying convection to the west. There is a signal for some patches of fog to develop south of I-80 as well as west of the Fox River vall...