Hourly Weather | Today Monday, September 21, 2026
Bellingham, Washington
12 PM
Cloudy Weather
61°
Feels Like 63°
17
Humidity: 74%
UV Index: 3
Wind: 8 mph
1 PM
Cloudy Weather
63°
Feels Like 64°
11
Humidity: 68%
UV Index: 3
Wind: 8 mph
2 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 65%
UV Index: 3
Wind: 9 mph
3 PM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 63%
UV Index: 2
Wind: 8 mph
4 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 59%
UV Index: 2
Wind: 9 mph
5 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 65%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 68%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
63°
Feels Like 59°
0
Humidity: 73%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Night
61°
Feels Like 57°
0
Humidity: 76%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
59°
Feels Like 55°
0
Humidity: 80%
UV Index: 0
Wind: 8 mph
10 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 82%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 84%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.95 µg/m³
  • PM10: 4.34 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 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: 2.81 µg/m³
  • PM10: 4.03 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.72 µg/m³
  • PM10: 3.81 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.38 µg/m³
  • PM10: 3.29 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.01 µg/m³
  • PM10: 2.75 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.82 µg/m³
  • PM10: 2.48 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.84 µg/m³
  • PM10: 2.52 µg/m³
  • O3: 0.028 ppm
  • NO2: 0.9 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
18 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.86 µg/m³
  • PM10: 2.65 µg/m³
  • O3: 0.020 ppm
  • NO2: 1.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.8 µg/m³
  • PM10: 2.7 µg/m³
  • O3: 0.016 ppm
  • NO2: 2.2 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
14 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.84 µg/m³
  • PM10: 2.82 µg/m³
  • O3: 0.015 ppm
  • NO2: 2.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.96 µg/m³
  • PM10: 3.05 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.05 µg/m³
  • PM10: 3.22 µg/m³
  • O3: 0.013 ppm
  • NO2: 3 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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