Hourly Weather | Today Tuesday, September 1, 2026
Marysville, Washington
9 AM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 85%
UV Index: 1
Wind: 6 mph
10 AM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 77%
UV Index: 1
Wind: 7 mph
11 AM
Cloudy Weather
66°
Feels Like 68°
0
Humidity: 70%
UV Index: 2
Wind: 8 mph
12 PM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 66%
UV Index: 2
Wind: 8 mph
1 PM
Cloudy Weather
72°
Feels Like 72°
0
Humidity: 63%
UV Index: 2
Wind: 8 mph
2 PM
Cloudy Weather
72°
Feels Like 75°
2
Humidity: 61%
UV Index: 5
Wind: 8 mph
3 PM
Cloudy Weather
73°
Feels Like 75°
2
Humidity: 58%
UV Index: 4
Wind: 8 mph
4 PM
Cloudy Weather
73°
Feels Like 75°
2
Humidity: 55%
UV Index: 3
Wind: 9 mph
5 PM
Cloudy Weather
73°
Feels Like 73°
2
Humidity: 57%
UV Index: 2
Wind: 9 mph
6 PM
Cloudy Weather
72°
Feels Like 70°
2
Humidity: 59%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
70°
Feels Like 66°
3
Humidity: 63%
UV Index: 1
Wind: 7 mph
8 PM
Cloudy Weather
66°
Feels Like 64°
4
Humidity: 66%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
64°
Feels Like 63°
4
Humidity: 73%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Weather
63°
Feels Like 61°
4
Humidity: 74%
UV Index: 0
Wind: 8 mph
11 PM
Cloudy Weather
63°
Feels Like 61°
6
Humidity: 75%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 4.7 µg/m³
  • PM10: 7.07 µg/m³
  • O3: 0.016 ppm
  • NO2: 2.6 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
16 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 3.88 µg/m³
  • PM10: 6.16 µg/m³
  • O3: 0.017 ppm
  • NO2: 2.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

11 AM
17 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.18 µg/m³
  • PM10: 5.33 µg/m³
  • O3: 0.018 ppm
  • NO2: 2 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.36 µg/m³
  • PM10: 4 µg/m³
  • O3: 0.024 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.93 µg/m³
  • PM10: 3.18 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.64 µg/m³
  • PM10: 2.65 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.38 µg/m³
  • PM10: 2.17 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.19 µg/m³
  • PM10: 1.82 µg/m³
  • O3: 0.027 ppm
  • NO2: 1.1 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 PM
24 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.07 µg/m³
  • PM10: 1.62 µg/m³
  • O3: 0.026 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.03 µg/m³
  • PM10: 1.58 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.11 µg/m³
  • PM10: 1.75 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.2 µg/m³
  • PM10: 1.93 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.28 µg/m³
  • PM10: 2.09 µg/m³
  • O3: 0.023 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.35 µg/m³
  • PM10: 2.29 µg/m³
  • O3: 0.020 ppm
  • NO2: 1.6 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
17 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.4 µg/m³
  • PM10: 2.44 µg/m³
  • O3: 0.018 ppm
  • NO2: 1.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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