Air Quality in McHenry, United States

Windy
27.7°C · 54.6% humidity
27.7°
Feels 30.4°
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast
25 12pm
25
25
55 3pm
46
40
36 6pm
33
31
29 9pm
28
27
26 12am
26
26
26 3am
25
25
25 6am
25
27
25 9am
25
25
AD 728×90

Air Quality Index Trend

48h · 1 stn

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.

54.6%
Humidity
80.0 km/h
Wind WNW
1018.0 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
55
14.0 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for McHenry?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.514.0 µg/m³ ✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX14.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
14.0
Median
14.0
Average
14.0
Low
14.0
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -8.0

What is the 7-day forecast for McHenry?

05-29
27.7° 4.1°
05-30
23.1° 10.2°
0.31 mm
05-31
27.9° 12.1°
06-01
28.8° 13.8°
1.19 mm
06-02
21.2° 14.7°
4.37 mm
06-03
28.5° 20.1°
06-04
23.0° 12.3°
0.06 mm
Both models agree Avg diff: 6.4°C

Where are air quality stations near McHenry?

29
Cary, Illinois, USA
12.7 km PM2.5: 7.0 µg/m³

What cities are near McHenry?

55 Crystal Lake 55 Cary 55 Round Lake 55 Round Lake Beach 55 Lake in the Hills 55 Grayslake 55 Algonquin 52 Lake Zurich 55 Huntley 45 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 2026-05-29T20:11 UTC.