Today | Weather | Monday, April 27, 2026

Weather in Seattle, Washington

05:36 AM
Now
Cloudy Weather
46° F
Feels Like 43°
Precipitation 48 %
Wind 8 mph
UV Index (0 - 11+) 0
Humidity 89 %
Today
Cloudy Weather
Day 63°
Night 48°
Precipitation 25 %
Wind 9 mph
UV Index (0 - 11+) 3

Seattle 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

7 mph

UV Index

2

Precipitation

1 %

Air Quality in Seattle

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.94 µg/m³
PM10 9.24 µg/m³
O3 0.035 ppm
NO2 0.9 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 0.15 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)
PM2.53.94 µg/m³
PM109.24 µg/m³
O368.96 µg/m³
NO21.66 µg/m³
SO20.57 µg/m³
CO131.34 µg/m³
NH30.15 µg/m³
NO0 µg/m³