Air Quality in Castle Rock, United States
Windy
34.0°C · 16.4% humidity
34.0°
Feels 34.0°
41
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Castle Rock's air quality — share it
AQI Forecast
27
5pm
27
27
41
8pm
37
34
39
11pm
31
30
29
2am
28
28
28
5am
27
25
25
8am
27
27
27
11am
27
27
27
2pm
27
27
Air Quality Index Trend
45h · 19 stnCastle 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.
16.4%
Humidity
44.4 km/h
Wind ENE
1008.9 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
9.75 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Castle Rock?
Temperature & Precipitation
PM2.5 Trend
45h · 19 stationsPM2.59.75 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX12.9
Extreme
What is the 7-day forecast for Castle Rock?
08-03
34.0° 18.0°
5.19 mm
08-04
34.8° 18.4°
08-05
33.9° 16.7°
7.44 mm
08-06
32.0° 16.5°
08-07
31.4° 17.4°
0.06 mm
08-08
35.6° 18.2°
0.13 mm
08-09
32.0° 18.5°
1.94 mm
Both models agree
Avg diff: 2.7°C
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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 2026-08-08T02:07 UTC.