Hourly Weather | Today › Thursday, October 29, 2026
Portland, Oregon
3 AM
Cloudy Night
45°
Feels Like 43°
38
Humidity: 88%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
45°
Feels Like 43°
35
Humidity: 89%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
45°
Feels Like 43°
35
Humidity: 88%
UV Index: 0
Wind: 5 mph
6 AM
Cloudy Night
45°
Feels Like 43°
38
Humidity: 89%
UV Index: 0
Wind: 5 mph
7 AM
Rainy Night
45°
Feels Like 41°
42
Humidity: 89%
UV Index: 0
Wind: 5 mph
8 AM
Rainy Weather
43°
Feels Like 37°
51
Humidity: 94%
UV Index: 0
Wind: 5 mph
9 AM
Cloudy Weather
45°
Feels Like 43°
47
Humidity: 94%
UV Index: 0
Wind: 5 mph
10 AM
Cloudy Weather
46°
Feels Like 46°
47
Humidity: 87%
UV Index: 1
Wind: 5 mph
11 AM
Rainy Weather
48°
Feels Like 46°
52
Humidity: 82%
UV Index: 1
Wind: 5 mph
12 PM
Cloudy Weather
52°
Feels Like 52°
48
Humidity: 77%
UV Index: 1
Wind: 5 mph
1 PM
Cloudy Weather
54°
Feels Like 54°
41
Humidity: 73%
UV Index: 1
Wind: 6 mph
2 PM
Cloudy Weather
55°
Feels Like 55°
34
Humidity: 70%
UV Index: 1
Wind: 6 mph
3 PM
Cloudy Weather
55°
Feels Like 55°
34
Humidity: 68%
UV Index: 1
Wind: 6 mph
4 PM
Cloudy Weather
57°
Feels Like 57°
40
Humidity: 66%
UV Index: 1
Wind: 5 mph
5 PM
Rainy Weather
55°
Feels Like 54°
60
Humidity: 71%
UV Index: 0
Wind: 5 mph
6 PM
Cloudy Weather
54°
Feels Like 54°
49
Humidity: 74%
UV Index: 0
Wind: 5 mph
7 PM
Rainy Weather
52°
Feels Like 48°
60
Humidity: 76%
UV Index: 0
Wind: 4 mph
8 PM
Cloudy Weather
52°
Feels Like 52°
25
Humidity: 78%
UV Index: 0
Wind: 4 mph
9 PM
Cloudy Weather
50°
Feels Like 52°
20
Humidity: 80%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Weather
48°
Feels Like 50°
20
Humidity: 82%
UV Index: 0
Wind: 2 mph
11 PM
Cloudy Weather
48°
Feels Like 48°
20
Humidity: 84%
UV Index: 0
Wind: 2 mph

Hourly Air Quality Forecast - AQI (US EPA)

3 AM
12 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.97 µg/m³
  • PM10: 1.31 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.6 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.98 µg/m³
  • PM10: 1.33 µg/m³
  • O3: 0.012 ppm
  • NO2: 1.5 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.98 µg/m³
  • PM10: 1.36 µg/m³
  • O3: 0.012 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.99 µg/m³
  • PM10: 1.38 µg/m³
  • O3: 0.012 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1 µg/m³
  • PM10: 1.42 µg/m³
  • O3: 0.012 ppm
  • NO2: 1.4 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

8 AM
10 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.04 µg/m³
  • PM10: 1.51 µg/m³
  • O3: 0.011 ppm
  • NO2: 1.8 ppb
  • SO2: 0 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

9 AM
9 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.09 µg/m³
  • PM10: 1.64 µg/m³
  • O3: 0.010 ppm
  • NO2: 2.5 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

10 AM
8 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.12 µg/m³
  • PM10: 1.76 µg/m³
  • O3: 0.009 ppm
  • NO2: 2.7 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.12 µg/m³
  • PM10: 1.81 µg/m³
  • O3: 0.010 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.82 µg/m³
  • PM10: 1.37 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.79 µg/m³
  • PM10: 1.19 µg/m³
  • O3: 0.036 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.77 µg/m³
  • PM10: 1.11 µg/m³
  • O3: 0.036 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.63 µg/m³
  • PM10: 0.84 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.56 µg/m³
  • PM10: 0.71 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.54 µg/m³
  • PM10: 0.67 µg/m³
  • O3: 0.038 ppm
  • NO2: 1 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.56 µg/m³
  • PM10: 0.72 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.61 µg/m³
  • PM10: 0.88 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.65 µg/m³
  • PM10: 1.1 µg/m³
  • O3: 0.021 ppm
  • NO2: 3.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 0.66 µg/m³
  • PM10: 1.26 µg/m³
  • O3: 0.020 ppm
  • NO2: 4.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 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: 0.71 µg/m³
  • PM10: 1.43 µg/m³
  • O3: 0.021 ppm
  • NO2: 4.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.06 µg/m³
  • PM10: 1.85 µg/m³
  • O3: 0.023 ppm
  • NO2: 4.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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