Today | Weather | Saturday, April 4, 2026

Weather in Seattle, Washington

11:39 AM
Now
Cloudy Weather
55° F
Feels Like 57°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 5
Humidity 65 %
Today
Cloudy Weather
Day 63°
Night 46°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 5

Seattle Weather Forecast Updated

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

Day

66°

Night

43°

Wind

4 mph

UV Index

5

Precipitation

0 %

Air Quality in Seattle

NOW
43 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.99 µg/m³
PM10 6.42 µg/m³
O3 0.047 ppm
NO2 1.9 ppb
SO2 0.8 ppb
CO 0.15 ppm
NH3 0.33 µg/m³
NO 1.02 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)
PM2.53.99 µg/m³
PM106.42 µg/m³
O392.05 µg/m³
NO23.51 µg/m³
SO22.03 µg/m³
CO172.69 µg/m³
NH30.33 µg/m³
NO1.02 µg/m³