Hourly Weather | Today Thursday, February 26, 2026
Portland, Oregon
3 AM
Cloudy Night
36°
Feels Like 36°
0
Humidity: 99%
UV Index: 0
Wind: 4 mph
4 AM
Cloudy Weather
36°
Feels Like 36°
0
Humidity: 100%
UV Index: 0
Wind: 4 mph
5 AM
Cloudy Night
34°
Feels Like 34°
0
Humidity: 100%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Night
34°
Feels Like 34°
0
Humidity: 100%
UV Index: 0
Wind: 4 mph
7 AM
Foggy Weather
30°
Feels Like 32°
0
Frost Risk: 71%
Humidity: 100%
UV Index: 0
Wind: 4 mph
8 AM
Foggy Weather
34°
Feels Like 36°
0
Humidity: 100%
UV Index: 1
Wind: 4 mph
9 AM
Foggy Weather
37°
Feels Like 39°
0
Humidity: 95%
UV Index: 1
Wind: 4 mph
10 AM
Foggy Weather
39°
Feels Like 43°
0
Humidity: 86%
UV Index: 1
Wind: 4 mph
11 AM
Foggy Weather
45°
Feels Like 48°
0
Humidity: 76%
UV Index: 2
Wind: 4 mph
12 PM
Foggy Weather
46°
Feels Like 55°
0
Humidity: 67%
UV Index: 3
Wind: 5 mph
1 PM
Cloudy Weather
50°
Feels Like 57°
0
Humidity: 61%
UV Index: 3
Wind: 5 mph
2 PM
Cloudy Weather
52°
Feels Like 57°
0
Humidity: 56%
UV Index: 2
Wind: 5 mph
3 PM
Cloudy Weather
55°
Feels Like 59°
0
Humidity: 52%
UV Index: 2
Wind: 4 mph
4 PM
Cloudy Weather
54°
Feels Like 55°
0
Humidity: 55%
UV Index: 1
Wind: 4 mph
5 PM
Cloudy Weather
52°
Feels Like 54°
0
Humidity: 59%
UV Index: 0
Wind: 4 mph
6 PM
Cloudy Night
48°
Feels Like 48°
0
Humidity: 67%
UV Index: 0
Wind: 4 mph
7 PM
Cloudy Night
46°
Feels Like 46°
0
Humidity: 75%
UV Index: 0
Wind: 4 mph
8 PM
Cloudy Night
45°
Feels Like 45°
0
Humidity: 82%
UV Index: 0
Wind: 4 mph
9 PM
Cloudy Night
43°
Feels Like 43°
0
Humidity: 84%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Night
41°
Feels Like 43°
0
Humidity: 85%
UV Index: 0
Wind: 2 mph
11 PM
Cloudy Night
39°
Feels Like 41°
0
Humidity: 87%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.47 µg/m³
  • PM10: 5.59 µg/m³
  • O3: 0.028 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.75 µg/m³
  • PM10: 5.91 µg/m³
  • O3: 0.027 ppm
  • NO2: 2.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.11 µg/m³
  • PM10: 6.32 µg/m³
  • O3: 0.026 ppm
  • NO2: 2.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.57 µg/m³
  • PM10: 6.87 µg/m³
  • O3: 0.025 ppm
  • NO2: 2.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.09 µg/m³
  • PM10: 7.58 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.18 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: 5.46 µg/m³
  • PM10: 8.17 µg/m³
  • O3: 0.021 ppm
  • NO2: 4.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.26 µg/m³
  • PM10: 8.14 µg/m³
  • O3: 0.019 ppm
  • NO2: 4.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.8 µg/m³
  • PM10: 7.78 µg/m³
  • O3: 0.018 ppm
  • NO2: 4.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.85 µg/m³
  • PM10: 6.51 µg/m³
  • O3: 0.034 ppm
  • NO2: 2.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.43 µg/m³
  • PM10: 6.04 µg/m³
  • O3: 0.036 ppm
  • NO2: 2.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.31 µg/m³
  • PM10: 5.84 µg/m³
  • O3: 0.037 ppm
  • NO2: 1.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.09 µg/m³
  • PM10: 5.37 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.9 µg/m³
  • PM10: 5 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.86 µg/m³
  • PM10: 4.92 µg/m³
  • O3: 0.043 ppm
  • NO2: 1.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 5.22 µg/m³
  • O3: 0.039 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.34 µg/m³
  • PM10: 5.71 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.75 µg/m³
  • PM10: 6.33 µg/m³
  • O3: 0.033 ppm
  • NO2: 4.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.3 µg/m³
  • PM10: 7.04 µg/m³
  • O3: 0.032 ppm
  • NO2: 4.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.19 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.72 µg/m³
  • PM10: 7.6 µg/m³
  • O3: 0.032 ppm
  • NO2: 4.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.19 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.06 µg/m³
  • PM10: 8.03 µg/m³
  • O3: 0.031 ppm
  • NO2: 4.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.29 µg/m³
  • PM10: 8.29 µg/m³
  • O3: 0.029 ppm
  • NO2: 4.6 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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