Today | Weather | Tuesday, June 9, 2026

Weather in Sammamish, Washington

04:59 PM
Now
Cloudy Weather
61° F
Feels Like 55°
Precipitation 40 %
Wind 15 mph
UV Index (0 - 11+) 1
Humidity 64 %
Today
Partly Sunny with Showers
Day 63°
Night 48°
Precipitation 84 %
Wind 14 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.

Sammamish Weather Forecast Updated

Last updated on

Air Quality in Sammamish

NOW
31 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.77 µg/m³
PM10 1.4 µg/m³
O3 0.033 ppm
NO2 0.4 ppb
SO2 0.2 ppb
CO 0.09 ppm
NH3 0.09 µg/m³
NO 0.12 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)
PM2.50.77 µg/m³
PM101.4 µg/m³
O364.96 µg/m³
NO20.77 µg/m³
SO20.49 µg/m³
CO100.36 µg/m³
NH30.09 µg/m³
NO0.12 µg/m³