Skip to main content
Local Weather Radar Official LogoLocal Weather Radar Official Logo
Plan your week in Dekalb County with our detailed 7-Day Weather Forecast. Access reliable daily temperature highs and lows, rain chances, and weekly weather pattern summaries.

Dekalb County 7-Day Weather Forecast

Sunday, Oct 25, 2026

Nighttime
53°F

Partly Cloudy

Feels like 53°F

Humidity

79%

Wind Speed

6.9 mph

Precipitation

0 in

Pressure

1029 hPa

UV Index

0

Visibility

10 mi

Cloud Cover

88%

Dew Point

44°F

7-Day Weather Forecast

Today

Oct 25

Partly Cloudy
71°H
51°L
0%

Mon

Oct 26

Partly Cloudy
65°H
49°L
0%

Tue

Oct 27

Partly Cloudy
67°H
49°L
0%

Wed

Oct 28

Partly Cloudy
69°H
53°L
0%

Thu

Oct 29

Partly Cloudy
64°H
57°L
0%

Fri

Oct 30

Partly Cloudy
64°H
46°L
0%

Sat

Oct 31

Partly Cloudy
67°H
53°L
0%

24-Hour Forecast

5 AM

53°

0%

6 AM

53°

0%

7 AM

53°

0%

8 AM

52°

0%

9 AM

52°

0%

10 AM

52°

0%

11 AM

51°

0%

12 PM

51°

0%

1 PM

51°

0%

2 PM

55°

0%

3 PM

60°

0%

4 PM

64°

0%

5 PM

67°

0%

6 PM

70°

0%

7 PM

71°

0%

8 PM

71°

0%

9 PM

71°

0%

10 PM

68°

0%

11 PM

63°

0%

12 AM

60°

0%

1 AM

59°

0%

2 AM

58°

0%

3 AM

56°

0%

4 AM

55°

0%

Air Quality (AQI)

44Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5

9.8 µg/m³

PM10

9.8 µg/m³

Sun & Moon Phase

Sunrise

6:00 AM

Sunset

8:00 PM

Moon Phase

Waxing Gibbous

Waxing Gibbous

Wind Conditions & Storm Tracking

Wind Direction

169.6° S

Sustained Wind

6.9 mph

Wind Gusts

6.9 mph

7-Day Temp Range

Week's Hottest

71°F

Max Rain Prob

0%

Expected 7-Day Swings

46°
71°

High and low limits expected over the next week.

Extended Local Forecasts

14 Day Weather Forecast7 Day Weather ForecastHourly Weather Tracker

Location View

Dekalb County · 41.91°N, 88.77°W
Radar Page
Coordinates41.9054°N, 88.7670°W
Elevationm
TimezoneAmerica/New_York

Nearby Cities in Illinois

More weather updates in Illinois

Explore all weather stations, radar maps, and localized forecasts.

Explore All Illinois Stations

Safety & Environmental Index

MetricValueStatus / Interpretation
Air Quality (AQI)44Good
UV Index0Low Risk
Visibility10 milesClear

Frequently Asked Questions

The 7-day forecast for Dekalb County includes comprehensive daily weather summaries, max/min temperatures, and expected rainfall to keep you prepared for the week.

About Dekalb County Climate & Weather

Weather forecast for Dekalb County is powered by high-resolution weather models using open-source infrastructure. Check current temperatures, rain radar graphs, hourly wind speeds, humidity values, and ultraviolet indexes directly from our weather tracking console.

Meteorological Data: Weather data for this area is aggregated from global and regional forecast models (GFS, HRRR, ERA5) and updated continuously every hour.