Hourly Weather | Today Wednesday, February 25, 2026
Gresham, Oregon
7 PM
Cloudy Night
45°
Feels Like 45°
4
Humidity: 78%
UV Index: 0
Wind: 4 mph
8 PM
Cloudy Night
43°
Feels Like 43°
1
Humidity: 84%
UV Index: 0
Wind: 4 mph
9 PM
Cloudy Night
41°
Feels Like 43°
1
Humidity: 86%
UV Index: 0
Wind: 2 mph
10 PM
Cloudy Night
39°
Feels Like 41°
1
Humidity: 89%
UV Index: 0
Wind: 2 mph
11 PM
Cloudy Night
37°
Feels Like 39°
1
Humidity: 91%
UV Index: 0
Wind: 2 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.36 µg/m³
  • PM10: 3.8 µg/m³
  • O3: 0.030 ppm
  • NO2: 3.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.63 µg/m³
  • PM10: 4.36 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.87 µg/m³
  • PM10: 4.86 µg/m³
  • O3: 0.024 ppm
  • NO2: 4.6 ppb
  • SO2: 0.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.09 µg/m³
  • PM10: 5.3 µg/m³
  • O3: 0.022 ppm
  • NO2: 4.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.37 µg/m³
  • PM10: 5.71 µg/m³
  • O3: 0.021 ppm
  • NO2: 4.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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