What is the air quality in Crystal Lake today?

The current Air Quality Index (AQI) in Crystal Lake is 17 (Good). PM2.5 concentration is 4.1 µg/m³.

What is the temperature in Crystal Lake right now?

The current temperature in Crystal Lake is 6.6°C (feels like 0.9°C). Humidity is 83.5% and wind speed is 48.7 km/h.

Is it safe to go outside in Crystal Lake?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 9.4 (Very High).

Air Quality in Crystal Lake, United States

Windy

6.6°C · 83.5% humidity

6.6°

Feels 0.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

25 6am

17 9am

22 12pm

24 3pm

25 6pm

25 9pm

25 12am

25 3am

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.

83.5%

Humidity

48.7 km/h

Wind NNE

1031.8 hPa

Pressure

9.4

UV Very High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.1 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Crystal Lake?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station

PM2.54.1 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX9.4

Very High

Station readings (1 station within 25 km)

4.1

Median

4.1

Average

4.1

Low

4.1

High

PM2.5 µg/m³ · Model: 6.0 · Bias: +1.9

What is the 7-day forecast for Crystal Lake?

05-29

27.8° 4.3°

05-30

23.1° 10.4°

0.69 mm

05-31

28.9° 12.1°

06-01

29.4° 13.9°

0.5 mm

06-02

21.5° 14.4°

6.81 mm

06-03

28.6° 20.7°

06-04

23.4° 11.9°

0.06 mm

Both models agree Avg diff: 5.4°C

Where are air quality stations near Crystal Lake?

Cary, Illinois, USA

6.6 km PM2.5: 0.7 µg/m³

What cities are near Crystal Lake?

17 Lake in the Hills 17 Cary 17 Algonquin 17 McHenry 17 Huntley 17 Carpentersville 17 Lake Zurich 17 Round Lake 17 Elgin 17 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 2026-05-29T14:50 UTC.