Today | Weather | Tuesday, January 13, 2026

Weather in Sammamish, Washington

02:06 PM
Now
Cloudy Weather
57° F
Feels Like 59°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 1
Humidity 86 %
Today
Cloudy Weather
Day 57°
Night 41°
Precipitation 25 %
Wind 4 mph
UV Index (0 - 11+) 1

Sammamish Weather Forecast Updated

Last updated on

Air Quality in Sammamish

NOW
21 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.55 µg/m³
PM10 5.49 µg/m³
O3 0.022 ppm
NO2 4.1 ppb
SO2 0.4 ppb
CO 0.18 ppm
NH3 0.68 µg/m³
NO 1.12 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)
PM2.53.55 µg/m³
PM105.49 µg/m³
O344.16 µg/m³
NO27.69 µg/m³
SO21.14 µg/m³
CO209.79 µg/m³
NH30.68 µg/m³
NO1.12 µg/m³