Hourly Weather | Today Wednesday, August 12, 2026
Castle Rock, Colorado
7 AM
Cloudy Weather
66°
Feels Like 66°
6
Humidity: 52%
UV Index: 1
Wind: 7 mph
8 AM
Cloudy Weather
72°
Feels Like 72°
0
Humidity: 41%
UV Index: 2
Wind: 7 mph
9 AM
Cloudy Weather
77°
Feels Like 79°
0
Humidity: 37%
UV Index: 3
Wind: 7 mph
10 AM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 30%
UV Index: 5
Wind: 7 mph
11 AM
Cloudy Weather
84°
Feels Like 90°
1
Humidity: 26%
UV Index: 7
Wind: 7 mph
12 PM
Cloudy Weather
90°
Feels Like 95°
1
Humidity: 22%
UV Index: 9
Wind: 7 mph
1 PM
Cloudy Weather
88°
Feels Like 93°
4
Humidity: 22%
UV Index: 9
Wind: 8 mph
2 PM
Cloudy Weather
88°
Feels Like 91°
19
Humidity: 24%
UV Index: 7
Wind: 9 mph
3 PM
Cloudy Weather
84°
Feels Like 86°
19
Humidity: 28%
UV Index: 5
Wind: 9 mph
4 PM
Cloudy Weather
82°
Feels Like 82°
24
Humidity: 31%
UV Index: 3
Wind: 9 mph
5 PM
Cloudy Weather
79°
Feels Like 79°
47
Humidity: 35%
UV Index: 2
Wind: 9 mph
6 PM
Sunny with a Chance of Thunderstorms
75°
Feels Like 70°
51
Humidity: 55%
UV Index: 1
Wind: 9 mph
7 PM
Cloudy Weather
72°
Feels Like 70°
47
Humidity: 60%
UV Index: 1
Wind: 10 mph
8 PM
Cloudy Weather
70°
Feels Like 66°
47
Humidity: 67%
UV Index: 0
Wind: 10 mph
9 PM
Stormy Weather
68°
Feels Like 63°
51
Humidity: 65%
UV Index: 0
Wind: 10 mph
10 PM
Cloudy Night
64°
Feels Like 63°
47
Humidity: 72%
UV Index: 0
Wind: 9 mph
11 PM
Cloudy Night
64°
Feels Like 63°
34
Humidity: 73%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

7 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.7 µg/m³
  • PM10: 3.08 µg/m³
  • O3: 0.021 ppm
  • NO2: 1.8 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 AM
19 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.67 µg/m³
  • PM10: 3.03 µg/m³
  • O3: 0.020 ppm
  • NO2: 1.9 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 AM
20 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.67 µg/m³
  • PM10: 3.03 µg/m³
  • O3: 0.022 ppm
  • NO2: 1.6 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 AM
45 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.02 µg/m³
  • PM10: 3.65 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.22 µg/m³
  • PM10: 3.94 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.25 µg/m³
  • PM10: 3.98 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.38 µg/m³
  • PM10: 4.12 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.48 µg/m³
  • PM10: 4.16 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.47 µg/m³
  • PM10: 4.03 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.32 µg/m³
  • PM10: 3.74 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.22 µg/m³
  • PM10: 3.55 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.08 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.15 µg/m³
  • PM10: 3.42 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 3.28 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.03 µg/m³
  • PM10: 3.24 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.7 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3 µg/m³
  • PM10: 3.21 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.77 µg/m³
  • PM10: 2.96 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.54 µg/m³
  • PM10: 2.71 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.