Hourly Weather | Today Wednesday, December 24, 2025
Boulder, Colorado
12 PM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 23%
Wind: 7 mph
UV Index: 2
1 PM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 23%
Wind: 6 mph
UV Index: 2
2 PM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 24%
Wind: 6 mph
UV Index: 2
3 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 26%
Wind: 6 mph
UV Index: 1
4 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 29%
Wind: 7 mph
UV Index: 1
5 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 34%
Wind: 7 mph
UV Index: 0
6 PM
Cloudy Night
59°
Feels Like 55°
0
Humidity: 39%
Wind: 7 mph
UV Index: 0
7 PM
Cloudy Night
55°
Feels Like 52°
0
Humidity: 45%
Wind: 8 mph
UV Index: 0
8 PM
Cloudy Night
54°
Feels Like 48°
0
Humidity: 50%
Wind: 8 mph
UV Index: 0
9 PM
Cloudy Night
52°
Feels Like 48°
0
Humidity: 52%
Wind: 8 mph
UV Index: 0
10 PM
Cloudy Night
52°
Feels Like 46°
0
Humidity: 55%
Wind: 8 mph
UV Index: 0
11 PM
Cloudy Night
50°
Feels Like 46°
0
Humidity: 57%
Wind: 8 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.9 µg/m³
  • PM10: 2.49 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.08 µg/m³
  • PM10: 2.69 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.19 µg/m³
  • PM10: 2.78 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.33 µg/m³
  • PM10: 2.9 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.46 µg/m³
  • PM10: 3.01 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.55 µg/m³
  • PM10: 3.09 µg/m³
  • O3: 0.029 ppm
  • NO2: 2 ppb
  • SO2: 0 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.58 µg/m³
  • PM10: 3.12 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.6 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.69 µg/m³
  • PM10: 3.25 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.8 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.89 µg/m³
  • PM10: 3.47 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.96 µg/m³
  • PM10: 3.54 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.01 µg/m³
  • PM10: 3.6 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.06 µg/m³
  • PM10: 3.65 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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