Today | Weather | Thursday, October 29, 2026

Weather in Portland, Oregon

01:06 AM
Now
Cloudy Night
46° F
Feels Like 45°
Precipitation 40 %
Wind 6 mph
Humidity 87 %
Today
Rainy Weather
Day 55°
Night 46°
Precipitation 85 %
Wind 5 mph
UV Index (0 - 11+) 2

Portland Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 29, 2025)
Cloudy Night

Day

57°

Night

43°

Wind

6 mph

Precipitation

0 %

Air Quality in Portland

NOW
13 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.96 µg/m³
PM10 1.32 µg/m³
O3 0.014 ppm
NO2 2 ppb
SO2 0 ppb
CO 0.13 ppm
NH3 0.1 µg/m³
NO 0.01 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)
PM2.5 – 0.96 µg/m³
PM10 – 1.32 µg/m³
O3 – 27.15 µg/m³
NO2 – 3.73 µg/m³
SO2 – 0.12 µg/m³
CO – 144.11 µg/m³
NH3 – 0.1 µg/m³
NO – 0.01 µg/m³