What is the air quality in Crystal Lake today?

The current Air Quality Index (AQI) in Crystal Lake is 34 (Good). PM2.5 concentration is 8.2 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.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 81 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.

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

8.2 µg/m³

PM10▲

54.9 µg/m³

050100150200300500

What is the weather forecast for Crystal Lake?

Temperature & Precipitation

PM2.5 Trend

45h · 81 stations

PM2.58.2 µg/m³ ✓ WHO

Good

PM1054.9 µg/m³

Moderate

UV INDEX0.0

Low

Station readings (1 station within 25 km)

8.2

Median

8.2

Average

8.2

Low

8.2

High

PM2.5 µg/m³ · Model: 27.1 · Bias: +18.9

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: 8.6 µg/m³

What cities are near Crystal Lake?

34 Lake in the Hills 34 Cary 34 Algonquin 34 McHenry 34 Huntley 34 Carpentersville 24 Lake Zurich 16 Round Lake 34 Elgin 16 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 2026-10-21T01:07 UTC.