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
Air Quality Index Trend
48h · 1 stnMcHenry'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▲
9.45 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for McHenry?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.59.45 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
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
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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.