What is the air quality in Castle Rock today?

The current Air Quality Index (AQI) in Castle Rock is 37 (Good). PM2.5 concentration is 8.85 µg/m³.

What is the temperature in Castle Rock right now?

The current temperature in Castle Rock is 33.8°C (feels like 33.8°C). Humidity is 13.5% and wind speed is 54.3 km/h.

Is it safe to go outside in Castle Rock?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 12.9 (Extreme).

Air Quality in Castle Rock, United States

Windy

33.8°C · 13.5% humidity

33.8°

Feels 33.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

25 11am

37 2pm

30 5pm

26 8pm

26 11pm

25 2am

25 5am

25 8am

Air Quality Index Trend

48h · 1 stn

View full history →

Castle Rock's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

13.5%

Humidity

54.3 km/h

Wind NNE

1009.7 hPa

Pressure

12.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.85 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Castle Rock?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station

PM2.58.85 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX12.9

Extreme

What is the 7-day forecast for Castle Rock?

07-21

33.8° 17.1°

0.94 mm

07-22

34.9° 17.2°

07-23

22.4° 13.4°

2.0 mm

07-24

34.3° 17.0°

0.25 mm

07-25

35.8° 17.1°

2.75 mm

07-26

31.8° 16.1°

8.44 mm

07-27

32.1° 16.6°

Both models agree Avg diff: 4.4°C

Where are air quality stations near Castle Rock?

Runyon Elementary School

26.7 km PM2.5: 18.8 µg/m³

What cities are near Castle Rock?

62 Parker 60 Highlands Ranch 60 Centennial 60 Castlewood 60 Southglenn 60 Greenwood Village 53 Littleton 57 Columbine 57 Ken Caryl 56 Dakota Ridge

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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 2026-07-21T20:45 UTC.