Today | Weather | Thursday, October 8, 2026

Weather in Portland, Oregon

10:27 PM
Now
Cloudy Night
63° F
Feels Like 63°
Precipitation 0 %
Wind 6 mph
Humidity 74 %
Today
Cloudy Night
Day 75°
Night 55°
Precipitation 25 %
Wind 5 mph

Portland Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 8, 2025)
Cloudy Night

Day

57°

Night

48°

Wind

5 mph

Precipitation

25 %

Air Quality in Portland

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

Pollutant Concentrations:

PM2.5 9.95 µg/m³
PM10 11.8 µg/m³
O3 0.023 ppm
NO2 2.3 ppb
SO2 0.1 ppb
CO 0.14 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)
PM2.5 – 9.95 µg/m³
PM10 – 11.8 µg/m³
O3 – 44.79 µg/m³
NO2 – 4.29 µg/m³
SO2 – 0.37 µg/m³
CO – 163.15 µg/m³
NH3 – 0.35 µg/m³
NO – 0 µg/m³