Hourly Weather | Today Thursday, December 4, 2025
Thornton, Colorado
4 AM
Cloudy Night
18°
Feels Like 14°
0
Humidity: 86%
Wind: 6 mph
UV Index: 0
5 AM
Cloudy Night
16°
Feels Like 12°
0
Humidity: 87%
Wind: 6 mph
UV Index: 0
6 AM
Cloudy Night
14°
Feels Like 10°
0
Humidity: 89%
Wind: 6 mph
UV Index: 0
7 AM
Cloudy Night
16°
Feels Like
0
Humidity: 80%
Wind: 7 mph
UV Index: 0
8 AM
Cloudy Weather
19°
Feels Like 16°
0
Humidity: 67%
Wind: 7 mph
UV Index: 1
9 AM
Cloudy Weather
25°
Feels Like 21°
0
Humidity: 62%
Wind: 7 mph
UV Index: 1
10 AM
Cloudy Weather
28°
Feels Like 27°
0
Humidity: 55%
Wind: 8 mph
UV Index: 2
11 AM
Cloudy Weather
34°
Feels Like 32°
0
Humidity: 50%
Wind: 8 mph
UV Index: 2
12 PM
Cloudy Weather
36°
Feels Like 36°
0
Humidity: 47%
Wind: 7 mph
UV Index: 3
1 PM
Cloudy Weather
37°
Feels Like 37°
0
Humidity: 46%
Wind: 7 mph
UV Index: 2
2 PM
Cloudy Weather
39°
Feels Like 39°
0
Humidity: 45%
Wind: 7 mph
UV Index: 2
3 PM
Cloudy Weather
37°
Feels Like 37°
0
Humidity: 45%
Wind: 7 mph
UV Index: 1
4 PM
Cloudy Weather
36°
Feels Like 34°
0
Humidity: 45%
Wind: 7 mph
UV Index: 1
5 PM
Cloudy Night
34°
Feels Like 28°
0
Humidity: 48%
Wind: 7 mph
UV Index: 0
6 PM
Cloudy Night
30°
Feels Like 25°
0
Humidity: 50%
Wind: 7 mph
UV Index: 0
7 PM
Cloudy Night
28°
Feels Like 21°
0
Humidity: 53%
Wind: 8 mph
UV Index: 0
8 PM
Cloudy Night
28°
Feels Like 19°
0
Humidity: 55%
Wind: 8 mph
UV Index: 0
9 PM
Cloudy Night
27°
Feels Like 19°
0
Humidity: 57%
Wind: 8 mph
UV Index: 0
10 PM
Cloudy Night
27°
Feels Like 19°
0
Humidity: 55%
Wind: 8 mph
UV Index: 0
11 PM
Cloudy Night
27°
Feels Like 19°
0
Humidity: 56%
Wind: 8 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.34 µg/m³
  • PM10: 1.35 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

5 AM
27 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.31 µg/m³
  • PM10: 1.31 µg/m³
  • O3: 0.029 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.

6 AM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.26 µg/m³
  • PM10: 1.26 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.7 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.27 µg/m³
  • PM10: 1.28 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.9 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.38 µg/m³
  • PM10: 1.4 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.4 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.42 µg/m³
  • PM10: 1.45 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.3 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.42 µg/m³
  • PM10: 1.46 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.9 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.51 µg/m³
  • PM10: 1.55 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.5 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.82 µg/m³
  • PM10: 1.85 µg/m³
  • O3: 0.033 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.23 µg/m³
  • PM10: 2.25 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.34 µg/m³
  • PM10: 2.36 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.09 µg/m³
  • PM10: 2.11 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.73 µg/m³
  • PM10: 1.76 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.39 µg/m³
  • PM10: 1.42 µg/m³
  • O3: 0.039 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.21 µg/m³
  • PM10: 1.24 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.16 µg/m³
  • PM10: 1.2 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.17 µg/m³
  • PM10: 1.22 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.19 µg/m³
  • PM10: 1.24 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.2 µg/m³
  • PM10: 1.25 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.18 µg/m³
  • PM10: 1.23 µg/m³
  • O3: 0.035 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.