Hourly Weather | Today Monday, July 20, 2026
Gresham, Oregon
3 PM
Cloudy Weather
81°
Feels Like 88°
0
Humidity: 45%
UV Index: 6
Wind: 5 mph
4 PM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 42%
UV Index: 5
Wind: 5 mph
5 PM
Cloudy Weather
82°
Feels Like 86°
0
Humidity: 41%
UV Index: 3
Wind: 5 mph
6 PM
Cloudy Weather
82°
Feels Like 84°
0
Humidity: 41%
UV Index: 2
Wind: 5 mph
7 PM
Cloudy Weather
82°
Feels Like 82°
0
Humidity: 44%
UV Index: 1
Wind: 4 mph
8 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 51%
UV Index: 0
Wind: 4 mph
9 PM
Cloudy Weather
77°
Feels Like 75°
0
Humidity: 57%
UV Index: 0
Wind: 4 mph
10 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 63%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Weather
72°
Feels Like 70°
0
Humidity: 70%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

3 PM
46 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 11.03 µg/m³
  • PM10: 12.82 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

4 PM
50 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.07 µg/m³
  • PM10: 13.66 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.32 µg/m³
  • PM10: 14.81 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.41 µg/m³
  • PM10: 15.94 µg/m³
  • O3: 0.048 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.76 µg/m³
  • PM10: 16.45 µg/m³
  • O3: 0.042 ppm
  • NO2: 2.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.64 µg/m³
  • PM10: 16.5 µg/m³
  • O3: 0.037 ppm
  • NO2: 3 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 14.25 µg/m³
  • PM10: 16.21 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.4 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 13.78 µg/m³
  • PM10: 15.82 µg/m³
  • O3: 0.027 ppm
  • NO2: 3.5 ppb
  • SO2: 0.3 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.

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

Pollutant Concentrations:

  • PM2.5: 13.1 µg/m³
  • PM10: 15.21 µg/m³
  • O3: 0.023 ppm
  • NO2: 3.5 ppb
  • SO2: 0.2 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.