Today | Weather | Wednesday, October 22, 2025

Weather in Sammamish, Washington

04:14 AM
Now
Cloudy Night
39° F
Feels Like 36°
Precipitation 0 %
Wind 6 mph
Humidity 99 %
Today
Rainy Weather
Day 64°
Night 50°
Precipitation 60 %
Wind 7 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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.

Sammamish Weather Forecast Updated

28 minutes ago
Last updated on

Air Quality in Sammamish

NOW
28 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 6.74 µg/m³
PM10 9.08 µg/m³
O3 0.015 ppm
NO2 5.2 ppb
SO2 0.2 ppb
CO 0.17 ppm
NH3 1.77 µg/m³
NO 0.01 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)
PM2.56.74 µg/m³
PM109.08 µg/m³
O328.98 µg/m³
NO29.8 µg/m³
SO20.43 µg/m³
CO191.35 µg/m³
NH31.77 µg/m³
NO0.01 µg/m³