What is the air quality in Crystal Lake today?

The current Air Quality Index (AQI) in Crystal Lake is 38 (Good). PM2.5 concentration is 9.1 µg/m³.

What is the temperature in Crystal Lake right now?

The current temperature in Crystal Lake is 18.4°C (feels like 18.4°C). Humidity is 62.9% and wind speed is 48.1 km/h.

Is it safe to go outside in Crystal Lake?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Crystal Lake, United States

Windy

18.4°C · 62.9% humidity

18.4°

Feels 18.4°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

27 6pm

38 9pm

29 12am

26 3am

25 6am

24 9am

24 12pm

24 3pm

Air Quality Index Trend

48h · 1 stn

View full history →

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.

62.9%

Humidity

48.1 km/h

Wind NNW

1010.2 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

9.1 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Crystal Lake?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station

PM2.59.1 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (1 station within 25 km)

9.1

Median

9.1

Average

9.1

Low

9.1

High

PM2.5 µg/m³ · Model: 6.25 · Bias: -2.8

What is the 7-day forecast for Crystal Lake?

06-09

29.8° 9.9°

2.5 mm

06-10

20.6° 18.6°

20.5 mm

06-11

24.4° 13.0°

0.06 mm

06-12

27.9° 19.3°

4.56 mm

06-13

27.6° 20.7°

3.25 mm

06-14

30.9° 13.8°

06-15

32.4° 23.5°

0.69 mm

Both models agree Avg diff: 6.5°C

Where are air quality stations near Crystal Lake?

Cary, Illinois, USA

6.6 km PM2.5: 12.1 µg/m³

What cities are near Crystal Lake?

38 Lake in the Hills 38 Cary 38 Algonquin 38 McHenry 38 Huntley 38 Carpentersville 23 Lake Zurich 18 Round Lake 38 Elgin 18 Round Lake Beach

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ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

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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 2026-06-09T02:42 UTC.