Today | Weather | Friday, October 9, 2026

Weather in Portland, Oregon

12:17 AM
Now
Cloudy Night
59° F
Feels Like 57°
Precipitation 0 %
Wind 6 mph
Humidity 79 %
Today
Rainy Weather
Day 66°
Night 46°
Precipitation 58 %
Wind 7 mph
UV Index (0 - 11+) 1

Portland Weather Forecast Updated

Weather Forecast History
Last Year's Weather on This Day (October 9, 2025)
Rainy Weather

Day

61°

Night

52°

Wind

6 mph

Precipitation

84 %

Air Quality in Portland

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

Pollutant Concentrations:

PM2.5 8.63 µg/m³
PM10 10.08 µg/m³
O3 0.017 ppm
NO2 2.1 ppb
SO2 0.1 ppb
CO 0.13 ppm
NH3 0.22 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)
PM2.5 – 8.63 µg/m³
PM10 – 10.08 µg/m³
O3 – 33.49 µg/m³
NO2 – 3.99 µg/m³
SO2 – 0.23 µg/m³
CO – 153.99 µg/m³
NH3 – 0.22 µg/m³
NO – 0 µg/m³