Today | Weather | Wednesday, October 1, 2025

Weather in Sammamish, Washington

11:26 AM

Now

59° F

Feels Like 57°

Precipitation 45 %

Wind 7 mph

UV Index (0 - 11+) 7

Humidity 81 %

Today

Day 66°

Night 50°

Precipitation 88 %

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

Last updated on October 01, 2025 9:54 AM

Air quality in Sammamish

NOW

24 AQI

Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.62 µg/m³

PM10 4.47 µg/m³

O₃ 32.35 ppb

NO₂ 3.90 ppb

SO₂ 0.34 ppb

CO 143.35 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors

View Hourly Air Quality Forecast