Hourly Weather | Today Tuesday, March 17, 2026
Gresham, Oregon
9 PM
Cloudy Night
59°
Feels Like 57°
19
Humidity: 73%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
55°
Feels Like 54°
24
Humidity: 79%
UV Index: 0
Wind: 5 mph
11 PM
Rainy Weather
52°
Feels Like 48°
53
Humidity: 82%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.59 µg/m³
  • PM10: 4.2 µg/m³
  • O3: 0.016 ppm
  • NO2: 3.8 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.69 µg/m³
  • PM10: 4.34 µg/m³
  • O3: 0.014 ppm
  • NO2: 3.7 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
14 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.67 µg/m³
  • PM10: 4.23 µg/m³
  • O3: 0.015 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.