Hourly Weather | Today Tuesday, July 21, 2026
Active Weather Warnings
Bellingham, Washington
2 AM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 94%
UV Index: 0
Wind: 5 mph
3 AM
Cloudy Night
59°
Feels Like 57°
0
Humidity: 98%
UV Index: 0
Wind: 5 mph
4 AM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 100%
UV Index: 0
Wind: 4 mph
5 AM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 99%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Weather
59°
Feels Like 61°
0
Humidity: 98%
UV Index: 1
Wind: 4 mph
7 AM
Cloudy Weather
63°
Feels Like 64°
0
Humidity: 92%
UV Index: 1
Wind: 4 mph
8 AM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 79%
UV Index: 2
Wind: 2 mph
9 AM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 69%
UV Index: 3
Wind: 5 mph
10 AM
Cloudy Weather
73°
Feels Like 79°
0
Humidity: 62%
UV Index: 4
Wind: 6 mph
11 AM
Cloudy Weather
77°
Feels Like 82°
0
Humidity: 57%
UV Index: 6
Wind: 7 mph
12 PM
Cloudy Weather
81°
Feels Like 86°
0
Humidity: 52%
UV Index: 7
Wind: 7 mph
1 PM
Cloudy Weather
81°
Feels Like 88°
0
Humidity: 49%
UV Index: 8
Wind: 7 mph
2 PM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 46%
UV Index: 7
Wind: 7 mph
3 PM
Cloudy Weather
84°
Feels Like 88°
0
Humidity: 44%
UV Index: 6
Wind: 7 mph
4 PM
Cloudy Weather
86°
Feels Like 90°
0
Humidity: 40%
UV Index: 4
Wind: 7 mph
5 PM
Cloudy Weather
84°
Feels Like 86°
0
Humidity: 44%
UV Index: 3
Wind: 7 mph
6 PM
Cloudy Weather
82°
Feels Like 82°
0
Humidity: 48%
UV Index: 2
Wind: 6 mph
7 PM
Cloudy Weather
81°
Feels Like 81°
0
Humidity: 53%
UV Index: 1
Wind: 6 mph
8 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 62%
UV Index: 1
Wind: 5 mph
9 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 68%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
70°
Feels Like 68°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 80%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.33 µg/m³
  • PM10: 6.13 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

3 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.29 µg/m³
  • PM10: 6.09 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

4 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.29 µg/m³
  • PM10: 6.11 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

5 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.33 µg/m³
  • PM10: 6.17 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

6 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.35 µg/m³
  • PM10: 6.19 µg/m³
  • O3: 0.013 ppm
  • NO2: 2.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

7 AM
22 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.38 µg/m³
  • PM10: 6.23 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.42 µg/m³
  • PM10: 6.29 µg/m³
  • O3: 0.010 ppm
  • NO2: 3.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.52 µg/m³
  • PM10: 6.41 µg/m³
  • O3: 0.012 ppm
  • NO2: 3.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

10 AM
23 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.63 µg/m³
  • PM10: 6.52 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.99 µg/m³
  • PM10: 6.85 µg/m³
  • O3: 0.017 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.46 µg/m³
  • PM10: 8.12 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.71 µg/m³
  • PM10: 8.3 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.98 µg/m³
  • PM10: 8.56 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.9 µg/m³
  • PM10: 9.48 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.1 µg/m³
  • PM10: 9.66 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.63 µg/m³
  • PM10: 9.19 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.2 µg/m³
  • PM10: 8.8 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.98 µg/m³
  • PM10: 8.64 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

8 PM
32 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.71 µg/m³
  • PM10: 8.46 µg/m³
  • O3: 0.035 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

9 PM
31 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.44 µg/m³
  • PM10: 8.25 µg/m³
  • O3: 0.028 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

10 PM
31 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.37 µg/m³
  • PM10: 8.24 µg/m³
  • O3: 0.024 ppm
  • NO2: 1.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

11 PM
31 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.32 µg/m³
  • PM10: 8.25 µg/m³
  • O3: 0.021 ppm
  • NO2: 2.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

Weather Alerts and Warnings for Bellingham

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 20 at 8:49PM PDT until July 22 at 11:00PM PDT by NWS Seattle WA
Jul 21, 10:00 AM Jul 22, 11:00 PM
WHAT: Hot conditions with high temperatures up to 90 degrees
expected and low temperatures from 55 to 62 degrees. This will
pose a moderate risk of heat-related illness.

WHERE: Eastern Strait of Juan de Fuca, Foothills and Valleys of
the North Cascades, Lake Crescent Area Including US 101, Lowlands
of Western Skagit and Northwestern Snohomish Counties, Lowlands of
Western Whatcom County, Northern Hood Canal, and Port Townsend
Area.

WHEN: From 10 AM Tuesday to 11 PM PDT Wednesday.

IMPACTS: Heat will significantly increase the risk of
heat-related illnesses for those who are sensitive to heat,
especially those without effective cooling or adequate hydration.

ADDITIONAL DETAILS: Areas closest to the water will experience
cooler daytime high temperatures.
+ Read More
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. For sheltering information and other human services in your area, dial 2 1 1 during business hours or visit wa211.org anytime.
Updated: Jul 21, 12:58 AM Source: NWS Alert

Air Quality Alert

Air Quality Alert issued July 20 at 12:48PM PDT by NWS Seattle WA
Jul 20, 12:48 PM Jul 22, 9:00 AM
An Air Quality Alert has been issued by the Northwest Clean Air
Agency until 9 AM PDT Wednesday.

An Air Quality Alert has been issued for Skagit and Whatcom Counties,
effective immediately through Wednesday July 22nd at 9am due to
expected wildfire smoke from Canadian wildfires.

Particulate matter (PM2.5) levels may reach Unhealthy for Sensitive
Groups. When air quality is Unhealthy for Sensitive Groups, sensitive
groups should take steps to reduce exposure. Limit time outside,
avoid strenuous outdoor activity, and follow tips for cleaner indoor
air. Everyone should watch for symptoms as a sign to reduce exposure.

For current air quality conditions and additional information visit
https://nwcleanairwa.gov
Updated: Jul 21, 12:58 AM Source: NWS Alert