Air Quality in Crystal Lake, United States
Windy
25.4°C · 37.4% humidity
25.4°
Feels 25.4°
41
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Crystal Lake's air quality — share it
AQI Forecast
54
7pm
54
54
41
10pm
45
47
49
1am
51
52
52
4am
53
53
33
7am
24
24
25
10am
25
24
24
1pm
24
24
24
4pm
24
24
Air Quality Index Trend
46h · 71 stnCrystal Lake's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
37.4%
Humidity
45.1 km/h
Wind NNE
1018.4 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.8 µg/m³
PM10
27.4 µg/m³
050100150200300500
What is the weather forecast for Crystal Lake?
Temperature & Precipitation
PM2.5 Trend
46h · 71 stationsPM2.59.8 µg/m³
✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX5.9
High
Station readings (1 station within 25 km)
9.8
Median
9.8
Average
9.8
Low
9.8
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +3.7
What is the 7-day forecast for Crystal Lake?
08-03
25.4° 17.7°
9.94 mm
08-04
34.0° 13.8°
08-05
30.1° 13.0°
2.25 mm
08-06
34.2° 21.2°
0.25 mm
08-07
30.0° 15.2°
0.5 mm
08-08
32.5° 15.7°
6.06 mm
08-09
32.2° 23.1°
Both models agree
Avg diff: 4.0°C
What cities are near Crystal Lake?
Get AQI alerts for Crystal Lake
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T03:51 UTC.