Air Quality in McHenry, United States

Windy
10.3°C · 72.4% humidity
10.3°
Feels 10.3°
39
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
24 4pm
24
24
39 7pm
35
32
30 10pm
29
28
27 1am
26
26
26 4am
26
25
25 7am
25
25
25 10am
—
—
25 1pm
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. Current PM2.5 concentration in McHenry is 1.9× the WHO annual guideline of 5 µg/m³.

72.4%
Humidity
75.3 km/h
Wind NNE
1029.3 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
39
9.45 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for McHenry?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.59.45 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (2 stations within 25 km)
9.45
Median
9.45
Average
7.9
Low
11.0
High
PM2.5 µg/m³ · Model: 5.9 · Bias: -3.5

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: 5.7°C

Where are air quality stations near McHenry?

16
Cary, Illinois, USA
12.7 km PM2.5: 3.8 µg/m³

What cities are near McHenry?

39 Crystal Lake 39 Cary 39 Round Lake 39 Round Lake Beach 39 Lake in the Hills 39 Grayslake 39 Algonquin 40 Lake Zurich 39 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 2026-05-29T00:10 UTC.