Today | Weather | Thursday, October 8, 2026

Weather in Sammamish, Washington

06:44 AM
Now
Cloudy Night
48° F
Feels Like 48°
Precipitation 0 %
Wind 2 mph
Humidity 98 %
Today
Cloudy Weather
Day 70°
Night 55°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3

Sammamish Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 8, 2025)
Partly Sunny with Showers

Day

63°

Night

48°

Wind

6 mph

UV Index

30

Precipitation

55 %

Air Quality in Sammamish

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

Pollutant Concentrations:

PM2.5 15.38 µg/m³
PM10 17.87 µg/m³
O3 0.011 ppm
NO2 5.7 ppb
SO2 0.2 ppb
CO 0.20 ppm
NH3 0.92 µg/m³
NO 0.09 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.5 – 15.38 µg/m³
PM10 – 17.87 µg/m³
O3 – 21.48 µg/m³
NO2 – 10.81 µg/m³
SO2 – 0.6 µg/m³
CO – 234.27 µg/m³
NH3 – 0.92 µg/m³
NO – 0.09 µg/m³