What is the air quality in McHenry today?

The current Air Quality Index (AQI) in McHenry is 28 (Good). PM2.5 concentration is 6.7 µg/m³.

What is the temperature in McHenry right now?

The current temperature in McHenry is 8.5°C (feels like 3.9°C). Humidity is 68.9% and wind speed is 41.2 km/h.

Is it safe to go outside in McHenry?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in McHenry, United States

Windy

8.5°C · 68.9% humidity

8.5°

Feels 3.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 84 stn

View full history →

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

68.9%

Humidity

41.2 km/h

Wind E

1024.9 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

6.7 µg/m³

PM10▲

104.9 µg/m³

050100150200300500

What is the weather forecast for McHenry?

Temperature & Precipitation

PM2.5 Trend

45h · 84 stations

PM2.56.7 µg/m³ ✓ WHO

Good

PM10104.9 µg/m³

Moderate

UV INDEX0.0

Low

Station readings (1 station within 25 km)

6.7

Median

6.7

Average

6.7

Low

6.7

High

PM2.5 µg/m³ · Model: 27.1 · Bias: +20.4

What is the 7-day forecast for McHenry?

10-21

22.6° 8.5°

2.25 mm

10-22

14.1° 5.7°

10-23

10.4° 6.0°

0.62 mm

10-24

21.5° 6.7°

10-25

13.2° 0.4°

1.5 mm

10-26

14.9° 2.0°

3.88 mm

10-27

8.5° -2.4°

0.13 mm

Both models agree Avg diff: 5.5°C

Where are air quality stations near McHenry?

Cary, Illinois, USA

12.7 km PM2.5: 9.4 µg/m³

Cary, Illinois, USA

12.7 km PM2.5: 8.9 µg/m³

What cities are near McHenry?

28 Crystal Lake 28 Cary 28 Round Lake 28 Round Lake Beach 28 Lake in the Hills 28 Grayslake 28 Algonquin 34 Lake Zurich 28 Huntley 35 Mundelein

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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 2026-10-21T00:31 UTC.