Today | Weather | Thursday, August 21, 2025

Weather in Seattle, Washington

12:31 PM
Now
Cloudy WeatherCloudy weather, overcast skies with clouds.
72° F
Feels Like 75°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 11
Humidity 46 %
Today
Cloudy WeatherCloudy weather, overcast skies with clouds.
Day 77°
Night 61°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Other:

Mostly bright and clear and beautiful.

Seattle Weather Forecast Updated

44 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (August 21, 2024)

Rainy WeatherRainy weather, precipitation in the form of water droplets falling from the sky.

Day

70°

Night

57°

Wind

8 mph

UV Index

1

Precipitation

40

Air quality in Seattle

NOW
51 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 8.53 µg/m³
PM10 17.33 µg/m³
O₃ 28.71 ppb
NO₂ 12.99 ppb
SO₂ 0.65 ppb
CO 178.41 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.