Today | Weather | Monday, April 27, 2026

Weather in Portland, Oregon

05:55 PM
Now
Cloudy Weather
61° F
Feels Like 61°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 55 %
Today
Cloudy Weather
Day 61°
Night 50°
Precipitation 4 %
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 (April 27, 2025)
Cloudy Weather

Day

63°

Night

48°

Wind

4 mph

UV Index

2

Precipitation

7 %

Air Quality in Portland

NOW
40 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.28 µg/m³
PM10 3.08 µg/m³
O3 0.043 ppm
NO2 0.4 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0.25 µg/m³
NO 0.14 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)
PM2.51.28 µg/m³
PM103.08 µg/m³
O384.27 µg/m³
NO20.73 µg/m³
SO20.33 µg/m³
CO124.03 µg/m³
NH30.25 µg/m³
NO0.14 µg/m³