Hourly Weather | Today Thursday, February 5, 2026
Portland, Maine
11 PM
Cloudy Night
18°
Feels Like
0
Frost Risk: 100%
Humidity: 64%
UV Index: 0
Wind: 8 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 9.02 µg/m³
  • PM10: 11.46 µg/m³
  • O3: 0.022 ppm
  • NO2: 12.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.27 ppm

Health Recommendations:

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