Today | Weather | Sunday, December 14, 2025

Weather in Portland, Oregon

05:09 AM
Now
Rainy Weather
43° F
Feels Like 39°
Precipitation 41 %
Wind 5 mph
Humidity 93 %
Today
Cloudy Weather
Day 54°
Night 48°
Precipitation 55 %
Wind 6 mph
UV Index (0 - 11+) 0

Portland Weather Forecast Updated

47 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 14, 2024)
Rainy Weather

Day

48°

Night

37°

Wind

7 mph

Precipitation

96 %

Air Quality in Portland

NOW
19 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.41 µg/m³
PM10 4.18 µg/m³
O3 0.021 ppm
NO2 1.8 ppb
SO2 0.1 ppb
CO 0.12 ppm
NH3 0.09 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)
PM2.53.41 µg/m³
PM104.18 µg/m³
O340.72 µg/m³
NO23.37 µg/m³
SO20.17 µg/m³
CO140.87 µg/m³
NH30.09 µg/m³
NO0 µg/m³