Today | Weather | Wednesday, August 19, 2026

Weather in Portland, Oregon

02:43 AM
Today
Cloudy Weather
Day 82°
Night 57°
Precipitation 3 %
Wind 6 mph
UV Index (0 - 11+) 7

Portland Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (August 19, 2025)
Cloudy Night

Day

81°

Night

61°

Wind

6 mph

Precipitation

10 %

Air Quality in Portland

NOW
15 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 3.5 µg/m³
PM10 6.39 µg/m³
O3 0.012 ppm
NO2 1.1 ppb
SO2 0.1 ppb
CO 0.07 ppm
NH3 0.35 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)
PM2.53.5 µg/m³
PM106.39 µg/m³
O323.13 µg/m³
NO22.04 µg/m³
SO20.18 µg/m³
CO84.38 µg/m³
NH30.35 µg/m³
NO0 µg/m³