What is the air quality in Castle Rock today?

The current Air Quality Index (AQI) in Castle Rock is 20 (Good). PM2.5 concentration is 4.77 µg/m³.

What is the temperature in Castle Rock right now?

The current temperature in Castle Rock is 16.6°C (feels like 16.6°C). Humidity is 68.3% and wind speed is 26.8 km/h.

Is it safe to go outside in Castle Rock?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0 (Low).

Air Quality in Castle Rock, United States

Drizzle

16.6°C · 68.3% humidity

16.6°

Feels 16.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast Calibrated

23 7pm

29 10pm

29 1am

29 4am

41 7am

41 10am

41 1pm

29 4pm

Station readings

CAMS model adj +4

PM2.5 Trend (24h)

23h · 22 stations

68.3%

Humidity

26.8 km/h

Wind N

1005.2 hPa

Pressure

1.4

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Castle Rock?

Temperature & Precipitation

PM2.54.77 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX1.4

Low

What is the 7-day forecast for Castle Rock?

04-09

18.1° 8.9°

0.38 mm

04-10

16.6° 6.2°

3.63 mm

04-11

19.2° 5.7°

10.38 mm

04-12

15.6° 4.9°

0.44 mm

04-13

14.3° 3.7°

04-14

9.4° -0.1°

13.44 mm

04-15

11.0° 1.0°

Both models agree Avg diff: 4.6°C

Where are air quality stations near Castle Rock?

Runyon Elementary School

26.7 km PM2.5: 4.0 µg/m³

What cities are near Castle Rock?

18 Parker 21 Highlands Ranch 20 Centennial 21 Castlewood 21 Southglenn 21 Greenwood Village 21 Littleton 21 Columbine 22 Ken Caryl 22 Dakota Ridge

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T22:12 UTC.