Hourly Weather | Today Wednesday, December 24, 2025
Boulder, Colorado
5 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 29%
Wind: 7 mph
UV Index: 0
6 PM
Cloudy Night
63°
Feels Like 61°
0
Humidity: 33%
Wind: 7 mph
UV Index: 0
7 PM
Cloudy Night
59°
Feels Like 55°
0
Humidity: 38%
Wind: 8 mph
UV Index: 0
8 PM
Cloudy Night
55°
Feels Like 52°
0
Humidity: 44%
Wind: 8 mph
UV Index: 0
9 PM
Cloudy Night
52°
Feels Like 46°
0
Humidity: 51%
Wind: 8 mph
UV Index: 0
10 PM
Cloudy Night
50°
Feels Like 46°
0
Humidity: 54%
Wind: 8 mph
UV Index: 0
11 PM
Cloudy Night
48°
Feels Like 45°
0
Humidity: 57%
Wind: 8 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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.