Today | Weather | Wednesday, June 17, 2026

Weather in Seattle, Washington

01:31 AM
Now
Cloudy Night
57° F
Feels Like 55°
Precipitation 0 %
Wind 6 mph
Humidity 76 %
Today
Cloudy Weather
Day 72°
Night 57°
Precipitation 3 %
Wind 7 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Seattle Weather Forecast Updated

52 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (June 17, 2025)
Cloudy Weather

Day

73°

Night

59°

Wind

8 mph

UV Index

9

Precipitation

4 %

Air Quality in Seattle

NOW
21 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.42 µg/m³
PM10 6.74 µg/m³
O3 0.022 ppm
NO2 1 ppb
SO2 0.1 ppb
CO 0.08 ppm
NH3 0.28 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)
PM2.52.42 µg/m³
PM106.74 µg/m³
O343.85 µg/m³
NO21.84 µg/m³
SO20.37 µg/m³
CO90.13 µg/m³
NH30.28 µg/m³
NO0 µg/m³