What is the air quality in Crystal Lake today?

The current Air Quality Index (AQI) in Crystal Lake is 26 (Good). PM2.5 concentration is 6.25 µg/m³.

What is the temperature in Crystal Lake right now?

The current temperature in Crystal Lake is 9.3°C (feels like 4.8°C). Humidity is 63.5% and wind speed is 44.1 km/h.

Is it safe to go outside in Crystal Lake?

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

Air Quality in Crystal Lake, United States

Windy

9.3°C · 63.5% humidity

9.3°

Feels 4.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

2 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

46h · 83 stn

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Crystal 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.

63.5%

Humidity

44.1 km/h

Wind ENE

1024.6 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

6.25 µg/m³

PM10▲

41.2 µg/m³

050100150200300500

What is the weather forecast for Crystal Lake?

Temperature & Precipitation

PM2.5 Trend

46h · 83 stations

PM2.56.25 µg/m³ ✓ WHO

Good

PM1041.2 µg/m³

Good

UV INDEX0.0

Low

Station readings (2 stations within 25 km)

6.25

Median

6.25

Average

5.3

Low

7.2

High

PM2.5 µg/m³ · Model: 19.2 · Bias: +12.9

What is the 7-day forecast for Crystal Lake?

10-21

21.6° 9.3°

2.19 mm

10-22

14.1° 5.9°

0.06 mm

10-23

10.6° 6.2°

0.69 mm

10-24

21.0° 7.0°

10-25

13.5° 0.4°

1.19 mm

10-26

14.6° 2.1°

4.63 mm

10-27

8.2° -2.2°

0.13 mm

Both models agree Avg diff: 5.6°C

Where are air quality stations near Crystal Lake?

Cary, Illinois, USA

6.6 km PM2.5: 7.2 µg/m³

Cary, Illinois, USA

6.6 km PM2.5: 6.7 µg/m³

What cities are near Crystal Lake?

26 Lake in the Hills 26 Cary 26 Algonquin 26 McHenry 26 Huntley 26 Carpentersville 21 Lake Zurich 16 Round Lake 26 Elgin 16 Round Lake Beach

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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 2026-10-21T02:52 UTC.