Today | Weather | Saturday, April 4, 2026

Weather in Portland, Oregon

08:02 AM
Now
Sunny Weather
43° F
Feels Like 43°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 84 %
Today
Cloudy Weather
Day 73°
Night 48°
Precipitation 1 %
Wind 8 mph
UV Index (0 - 11+) 5

Portland Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 4, 2025)
Cloudy Weather

Day

70°

Night

46°

Wind

6 mph

UV Index

5

Precipitation

1 %

Air Quality in Portland

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.55 µg/m³
PM10 5.73 µg/m³
O3 0.028 ppm
NO2 2.9 ppb
SO2 0.3 ppb
CO 0.15 ppm
NH3 0.84 µg/m³
NO 0.1 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)
PM2.53.55 µg/m³
PM105.73 µg/m³
O354.13 µg/m³
NO25.46 µg/m³
SO20.79 µg/m³
CO170.8 µg/m³
NH30.84 µg/m³
NO0.1 µg/m³