Hourly Weather | Today Tuesday, October 7, 2025
Seattle, Washington
2 PM
Cloudy Weather
68°
Feels Like 72°
0
Humidity: 48%
Wind: 6 mph
UV Index: 30
3 PM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 46%
Wind: 6 mph
UV Index: 25
4 PM
Cloudy Weather
72°
Feels Like 72°
0
Humidity: 44%
Wind: 6 mph
UV Index: 19
5 PM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 47%
Wind: 6 mph
UV Index: 12
6 PM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 53%
Wind: 7 mph
UV Index: 4
7 PM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 59%
Wind: 7 mph
UV Index: 0
8 PM
Cloudy Night
61°
Feels Like 57°
0
Humidity: 66%
Wind: 7 mph
UV Index: 0
9 PM
Cloudy Night
59°
Feels Like 55°
0
Humidity: 71%
Wind: 7 mph
UV Index: 0
10 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 76%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 80%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

2 PM
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.37 µg/m³
  • PM10: 16.12 µg/m³
  • O3: 0.043 ppm
  • NO2: 2.3 ppb
  • SO2: 1.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.62 µg/m³
  • PM10: 14.17 µg/m³
  • O3: 0.049 ppm
  • NO2: 1.9 ppb
  • SO2: 1.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.43 µg/m³
  • PM10: 13.88 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.8 ppb
  • SO2: 1.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
52 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.84 µg/m³
  • PM10: 14.24 µg/m³
  • O3: 0.050 ppm
  • NO2: 2.1 ppb
  • SO2: 1.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.61 µg/m³
  • PM10: 13.97 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.5 ppb
  • SO2: 0.9 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
47 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.16 µg/m³
  • PM10: 12.59 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.13 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.4 µg/m³
  • PM10: 10 µg/m³
  • O3: 0.035 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.69 µg/m³
  • PM10: 7.39 µg/m³
  • O3: 0.031 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.19 µg/m³
  • PM10: 6.01 µg/m³
  • O3: 0.028 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 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: 3.37 µg/m³
  • PM10: 5.35 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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