What is the air quality in Castle Rock today?

The current Air Quality Index (AQI) in Castle Rock is 12 (Good). PM2.5 concentration is 3.0 µg/m³.

What is the temperature in Castle Rock right now?

The current temperature in Castle Rock is 27.8°C (feels like 27.8°C). Humidity is 25.4% 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 10.9 (Extreme).

Air Quality in Castle Rock, United States

Drizzle

27.8°C · 25.4% humidity

27.8°

Feels 27.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

25 1pm

12 4pm

20 7pm

23 10pm

24 1am

24 4am

24 7am

25 10am

Air Quality Index Trend

47h · 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.

25.4%

Humidity

54.3 km/h

Wind SSE

1009.8 hPa

Pressure

10.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

3.0 µg/m³

PM10▲

13.7 µg/m³

050100150200300500

What is the weather forecast for Castle Rock?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station

PM2.53.0 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX10.9

Extreme

What is the 7-day forecast for Castle Rock?

05-28

29.4° 9.2°

6.19 mm

05-29

28.0° 11.4°

14.31 mm

05-30

27.8° 11.9°

0.5 mm

05-31

27.7° 11.9°

8.44 mm

06-01

26.9° 12.7°

06-02

33.4° 16.6°

06-03

31.5° 12.8°

Both models agree Avg diff: 4.7°C

Where are air quality stations near Castle Rock?

Runyon Elementary School

26.7 km PM2.5: 4.5 µg/m³

What cities are near Castle Rock?

21 Parker 20 Highlands Ranch 21 Centennial 20 Castlewood 19 Southglenn 20 Greenwood Village 12 Littleton 20 Columbine 24 Ken Caryl 21 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 2026-05-28T22:52 UTC.