Hourly Weather | Today Thursday, October 16, 2025
Boulder, Colorado
2 PM
Partly Sunny with Showers
66°
Feels Like 63°
44
Humidity: 26%
Wind: 10 mph
UV Index: 19
3 PM
Cloudy Weather
64°
Feels Like 64°
40
Humidity: 24%
Wind: 12 mph
UV Index: 27
4 PM
Cloudy Weather
64°
Feels Like 63°
37
Humidity: 24%
Wind: 14 mph
UV Index: 20
5 PM
Cloudy Weather
63°
Feels Like 59°
37
Humidity: 23%
Wind: 15 mph
UV Index: 12
6 PM
Cloudy Weather
59°
Feels Like 54°
40
Humidity: 24%
Wind: 15 mph
UV Index: 4
7 PM
Rainy Night
55°
Feels Like 48°
44
Humidity: 28%
Wind: 13 mph
UV Index: 0
8 PM
Cloudy Night
54°
Feels Like 46°
0
Humidity: 34%
Wind: 14 mph
UV Index: 0
9 PM
Cloudy Night
52°
Feels Like 45°
0
Humidity: 38%
Wind: 14 mph
UV Index: 0
10 PM
Cloudy Night
50°
Feels Like 43°
0
Humidity: 40%
Wind: 12 mph
UV Index: 0
11 PM
Cloudy Night
48°
Feels Like 43°
0
Humidity: 41%
Wind: 9 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 0.61 µg/m³
  • PM10: 1.44 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.55 µg/m³
  • PM10: 1.22 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 1.03 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.1 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.89 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.78 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0 ppb
  • CO: 0.06 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.7 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.67 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.9 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.5 µg/m³
  • PM10: 0.65 µg/m³
  • O3: 0.037 ppm
  • NO2: 1 ppb
  • SO2: 0 ppb
  • CO: 0.07 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: 0.5 µg/m³
  • PM10: 0.63 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 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: 0.5 µg/m³
  • PM10: 0.61 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.1 ppb
  • SO2: 0 ppb
  • CO: 0.07 ppm

Health Recommendations:

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