Today | Weather | Tuesday, November 4, 2025

Weather in Portland, Oregon

02:16 AM
Now
Rainy Weather
46° F
Feels Like 43°
Precipitation 68 %
Wind 5 mph
Humidity 100 %
Today
Rainy Weather
Day 57°
Night 48°
Precipitation 60 %
Wind 9 mph
UV Index (0 - 11+) 1

Portland Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (November 4, 2024)

Rainy Weather

Day

54°

Night

45°

Wind

4 mph

Precipitation

60

Air Quality in Portland

NOW
31 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.11 µg/m³
PM10 3.72 µg/m³
O3 0.033 ppm
NO2 0.4 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 0.03 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)
PM2.52.11 µg/m³
PM103.72 µg/m³
O365.24 µg/m³
NO20.8 µg/m³
SO20.22 µg/m³
CO102.71 µg/m³
NH30.03 µg/m³
NO0 µg/m³