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Today | Weather | Wednesday, December 24, 2025
Active Weather Warnings

Weather in Sammamish, Washington

10:08 AM
Now
Cloudy Weather
43° F
Feels Like 37°
Precipitation 49 %
Wind 9 mph
UV Index (0 - 11+) 0
Humidity 88 %
Today
Rainy Weather
Day 48°
Night 34°
Precipitation 92 %
Wind 14 mph
UV Index (0 - 11+) 0

Sammamish Weather Forecast Updated

Last updated on

Air Quality in Sammamish

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.1 µg/m³
PM10 1.37 µg/m³
O3 0.029 ppm
NO2 3.5 ppb
SO2 0.1 ppb
CO 0.15 ppm
NH3 0.13 µg/m³
NO 0.03 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)
PM2.5 – 1.1 µg/m³
PM10 – 1.37 µg/m³
O3 – 56.6 µg/m³
NO2 – 6.67 µg/m³
SO2 – 0.29 µg/m³
CO – 170.48 µg/m³
NH3 – 0.13 µg/m³
NO – 0.03 µg/m³
View Hourly Air Quality Forecast

Weather Alerts and Warnings for Sammamish

Severe Future Possible

High Wind Watch

High Wind Watch issued December 23 at 3:54PM PST until December 24 at 7:00PM PST by NWS Seattle WA
Dec 24, 10:00 AM → Dec 24, 7:00 PM
WHAT: East to northeast winds of 10 to 20 mph with gusts to 30
mph will suddenly shift to southerly Wednesday afternoon with wind
speeds of 25 to 35 mph and gusts of 50 to 60 mph possible.

WHERE: Portions of northwest and west central Washington.

WHEN: From Wednesday morning through Wednesday evening.

IMPACTS: Damaging winds could blow down trees and power lines.
Widespread power outages are possible. Travel could be difficult,
especially for high profile vehicles.
+ Read More
Monitor the latest forecasts and warnings for updates. Fasten loose objects or shelter objects in a safe location prior to the onset of winds.
Updated: Dec 23, 7:37 PM Source: NWS Alert
Severe Expected Likely

High Wind Warning

High Wind Warning issued December 24 at 4:26AM PST until December 24 at 7:00PM PST by NWS Seattle WA
Dec 24, 10:00 AM → Dec 24, 7:00 PM
WHAT: South winds 20 to 35 mph with gusts 50 to 60 mph expected.

WHERE: Portions of northwest and west central Washington.

WHEN: From 10 AM this morning to 7 PM PST this evening.

IMPACTS: Damaging winds will blow down trees and power lines.
Widespread power outages are expected. Travel will be difficult,
especially for high profile vehicles.

ADDITIONAL DETAILS: Winds will initially begin as
east/northeasterly in the morning before an abrupt shift to
southerly by midday, with which the strongest winds will occur.
Highly saturated soils will allow for an enhanced risk of tree
damage and uprooting.
+ Read More
People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive.
Updated: Dec 24, 8:22 AM Source: NWS Alert
Moderate Expected Likely

Wind Advisory

Wind Advisory issued December 23 at 2:26AM PST until December 24 at 6:00PM PST by NWS Seattle WA
Dec 24, 10:00 AM → Dec 24, 6:00 PM
WHAT: South winds 10 to 25 mph with gusts ranging 40 to 50 mph
expected.

WHERE: Portions of northwest and west central Washington.

WHEN: From 10 AM to 6 PM PST Wednesday.

IMPACTS: Gusty winds could blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

ADDITIONAL DETAILS: Localized wind gusts to 55 MPH possible.
+ Read More
Use extra caution when driving, especially if operating a high profile vehicles. Secure outdoor objects.
Updated: Dec 23, 6:38 AM Source: NWS Alert