What is the air quality in DeKalb today?

The current Air Quality Index (AQI) in DeKalb is 36 (Good). PM2.5 concentration is 8.74 µg/m³.

What is the temperature in DeKalb right now?

The current temperature in DeKalb is 24.6°C (feels like 24.6°C). Humidity is 78.0% and wind speed is 32.1 km/h.

Is it safe to go outside in DeKalb?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 10.9 (Extreme).

Air Quality in DeKalb, United States

Cloudy

24.6°C · 78.0% humidity

24.6°

Feels 24.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

24 1pm

36 4pm

28 7pm

27 10pm

25 1am

66 4am

83 7am

83 10am

146

Air Quality Index Trend

37h · 2 stn

View full history →

DeKalb's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

78.0%

Humidity

32.1 km/h

Wind NE

1014.1 hPa

Pressure

10.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.74 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for DeKalb?

Temperature & Precipitation

PM2.5 Trend

37h · 2 stations

PM2.58.74 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX10.9

Extreme

What is the 7-day forecast for DeKalb?

07-21

26.1° 21.7°

1.0 mm

07-22

24.6° 17.1°

0.06 mm

07-23

21.2° 16.0°

17.06 mm

07-24

26.6° 14.5°

07-25

22.2° 16.0°

0.19 mm

07-26

24.7° 19.7°

2.75 mm

07-27

24.8° 18.8°

1.13 mm

Both models agree Avg diff: 4.3°C

What cities are near DeKalb?

36 Sycamore 37 Wasco 45 St. Charles 45 Geneva 45 Batavia 34 Huntley 45 North Aurora 41 Belvidere 38 South Elgin 45 Montgomery

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T21:44 UTC.