Hourly Weather | Today Wednesday, October 15, 2025
Portland, Oregon
1 AM
Cloudy Night
48°
Feels Like 45°
0
Humidity: 68%
Wind: 7 mph
UV Index: 0
2 AM
Cloudy Night
46°
Feels Like 45°
0
Humidity: 70%
Wind: 7 mph
UV Index: 0
3 AM
Cloudy Night
46°
Feels Like 43°
0
Humidity: 72%
Wind: 6 mph
UV Index: 0
4 AM
Cloudy Night
45°
Feels Like 43°
0
Humidity: 74%
Wind: 6 mph
UV Index: 0
5 AM
Cloudy Night
45°
Feels Like 41°
0
Humidity: 76%
Wind: 6 mph
UV Index: 0
6 AM
Cloudy Night
43°
Feels Like 41°
0
Humidity: 77%
Wind: 6 mph
UV Index: 0
7 AM
Cloudy Night
43°
Feels Like 39°
0
Humidity: 79%
Wind: 6 mph
UV Index: 0
8 AM
Sunny Weather
43°
Feels Like 41°
0
Humidity: 81%
Wind: 5 mph
UV Index: 3
9 AM
Sunny Weather
45°
Feels Like 46°
0
Humidity: 74%
Wind: 4 mph
UV Index: 11
10 AM
Sunny Weather
48°
Feels Like 54°
0
Humidity: 63%
Wind: 2 mph
UV Index: 18
11 AM
Sunny Weather
54°
Feels Like 61°
0
Humidity: 54%
Wind: 1 mph
UV Index: 24
12 PM
Sunny Weather
55°
Feels Like 64°
0
Humidity: 48%
Wind: 4 mph
UV Index: 29
1 PM
Sunny Weather
59°
Feels Like 64°
0
Humidity: 45%
Wind: 6 mph
UV Index: 31
2 PM
Sunny Weather
63°
Feels Like 66°
0
Humidity: 41%
Wind: 6 mph
UV Index: 29
3 PM
Sunny Weather
64°
Feels Like 66°
0
Humidity: 39%
Wind: 6 mph
UV Index: 24
4 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 37%
Wind: 6 mph
UV Index: 18
5 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 40%
Wind: 6 mph
UV Index: 11
6 PM
Cloudy Weather
63°
Feels Like 61°
0
Humidity: 45%
Wind: 6 mph
UV Index: 3
7 PM
Night
61°
Feels Like 57°
0
Humidity: 52%
Wind: 6 mph
UV Index: 0
8 PM
Night
57°
Feels Like 55°
0
Humidity: 59%
Wind: 6 mph
UV Index: 0
9 PM
Night
55°
Feels Like 54°
0
Humidity: 65%
Wind: 6 mph
UV Index: 0
10 PM
Night
54°
Feels Like 52°
0
Humidity: 70%
Wind: 6 mph
UV Index: 0
11 PM
Night
52°
Feels Like 50°
0
Humidity: 74%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
22 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.64 µg/m³
  • PM10: 2.63 µg/m³
  • O3: 0.023 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.

2 AM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.67 µg/m³
  • PM10: 2.7 µg/m³
  • O3: 0.022 ppm
  • NO2: 2.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.7 µg/m³
  • PM10: 2.76 µg/m³
  • O3: 0.021 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.75 µg/m³
  • PM10: 2.84 µg/m³
  • O3: 0.020 ppm
  • NO2: 2.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 1.8 µg/m³
  • PM10: 2.94 µg/m³
  • O3: 0.018 ppm
  • NO2: 2.5 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 AM
16 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.86 µg/m³
  • PM10: 3.06 µg/m³
  • O3: 0.017 ppm
  • NO2: 2.7 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 AM
15 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.97 µg/m³
  • PM10: 3.3 µg/m³
  • O3: 0.016 ppm
  • NO2: 3.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.11 µg/m³
  • PM10: 3.62 µg/m³
  • O3: 0.014 ppm
  • NO2: 4.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.17 µg/m³
  • PM10: 3.82 µg/m³
  • O3: 0.014 ppm
  • NO2: 4.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.15 µg/m³
  • PM10: 3.89 µg/m³
  • O3: 0.014 ppm
  • NO2: 3.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.15 µg/m³
  • PM10: 3.9 µg/m³
  • O3: 0.016 ppm
  • NO2: 2.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.1 µg/m³
  • PM10: 3.6 µg/m³
  • O3: 0.029 ppm
  • NO2: 1.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 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: 2.48 µg/m³
  • PM10: 3.89 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.21 µg/m³
  • PM10: 4.6 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 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: 4.01 µg/m³
  • PM10: 5.4 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 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: 4.78 µg/m³
  • PM10: 6.2 µg/m³
  • O3: 0.039 ppm
  • NO2: 1 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 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: 5.34 µg/m³
  • PM10: 6.81 µg/m³
  • O3: 0.038 ppm
  • NO2: 1.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.82 µg/m³
  • PM10: 7.38 µg/m³
  • O3: 0.032 ppm
  • NO2: 2.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.34 µg/m³
  • PM10: 8.06 µg/m³
  • O3: 0.024 ppm
  • NO2: 3.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.78 µg/m³
  • PM10: 8.71 µg/m³
  • O3: 0.020 ppm
  • NO2: 3.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.91 µg/m³
  • PM10: 8.96 µg/m³
  • O3: 0.017 ppm
  • NO2: 3.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7 µg/m³
  • PM10: 9.15 µg/m³
  • O3: 0.014 ppm
  • NO2: 3.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.05 µg/m³
  • PM10: 9.26 µg/m³
  • O3: 0.012 ppm
  • NO2: 3.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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