Live Weather & Forecast

Weather in Sammamish

Washington, United States · Real-time conditions & 3-day outlook

Flag of United States
Overcast
3°C
Feels like 3°C
38°F / Feels 37°F
Overcast
Sammamish, Washington
🌙 Nighttime
Updated: 2026-04-16 03:00
💧
Humidity
92%
💨
Wind
3.6 km/h SSW
🌬️
Wind Gust
6.1 km/h
🌡️
Pressure
1019 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
100%
💦
Dew Point
1.7°C
🌐
Wind Degree
194°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
192.9 μg/m³
NO₂
5.9 μg/m³
O₃
84 μg/m³
SO₂
2.2 μg/m³
PM 2.5
4.9 μg/m³
PM 10
6.2 μg/m³

Weather Alerts 4

Met · Severe · Expected
Winter Storm Warning issued April 15 at 1:49PM PDT until April 15 at 11:00PM PDT by NWS Seattle WA

* WHAT...Heavy snow at times. Additional snow accumulations up to 5 inches. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snow showers will continue into tonight. Brief periods of higher snow rates w...

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Prepare for possible power outages.

Effective: 2026-04-15T13:49:00-07:00  ·  Expires: 2026-04-15T23:00:00-07:00
Met · Minor · Expected
Frost Advisory issued April 15 at 1:25PM PDT until April 16 at 9:00AM PDT by NWS Seattle WA

* WHAT...Temperatures as low as 32 to 36 will result in frost formation. * WHERE...Eastern Kitsap County, Eastern Strait of Juan de Fuca, Foothills of the Western and Southern Olympic Peninsula, Lake Crescent Area Including US 101, Northern Hood Canal, Port Townsend Area, and Lowlands of Pierce and Southern King Counties. * WHEN...From 1 AM to 9 AM PDT Thursday. * IMPACTS...Frost could harm sen...

Take steps now to protect tender plants from the cold.

Effective: 2026-04-15T13:25:00-07:00  ·  Expires: 2026-04-15T22:00:00-07:00
Met · Minor · Expected
Frost Advisory issued April 15 at 11:17PM PDT until April 16 at 9:00AM PDT by NWS Seattle WA

* WHAT...Temperatures as low as 32 to 36 will result in frost formation. * WHERE...Lower Chehalis River Valley, Foothills and Valleys of Pierce and Southern King Counties, and Foothills and Valleys of Thurston and Lewis Counties. * WHEN...Until 9 AM PDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.

Effective: 2026-04-15T23:17:00-07:00  ·  Expires: 2026-04-16T09:00:00-07:00
Met · Minor · Expected
Frost Advisory issued April 15 at 11:17PM PDT until April 16 at 9:00AM PDT by NWS Seattle WA

* WHAT...Temperatures as low as 32 to 36 will result in frost formation. * WHERE...Eastern Kitsap County, Eastern Strait of Juan de Fuca, Foothills of the Western and Southern Olympic Peninsula, Lake Crescent Area Including US 101, Northern Hood Canal, Port Townsend Area, and Lowlands of Pierce and Southern King Counties. * WHEN...Until 9 AM PDT Thursday. * IMPACTS...Frost could harm sensitive...

Take steps now to protect tender plants from the cold.

Effective: 2026-04-15T23:17:00-07:00  ·  Expires: 2026-04-16T09:00:00-07:00

Today's Hourly Forecast

24-hour breakdown for Sammamish, Washington

12 AM
Partly Cloudy
3°
Partly Cloudy
💧 89% 💨 1.8 km/h
1 AM
Cloudy
3°
Cloudy
💧 90% 💨 1.8 km/h
2 AM
Partly Cloudy
3°
Partly Cloudy
💧 90% 💨 2.9 km/h
3 AM
Overcast
3°
Overcast
💧 92% 💨 3.6 km/h
4 AM
Partly Cloudy
3°
Partly Cloudy
💧 91% 💨 3.6 km/h
5 AM
Partly Cloudy
3°
Partly Cloudy
💧 89% 💨 4.3 km/h
6 AM
Overcast
3°
Overcast
💧 88% 💨 5.8 km/h
7 AM
Partly Cloudy
4°
Partly Cloudy
💧 85% 💨 2.9 km/h
8 AM
Overcast
5°
Overcast
💧 83% 💨 3.2 km/h
9 AM
Partly Cloudy
6°
Partly Cloudy
💧 81% 💨 4 km/h
10 AM
Sunny
7°
Sunny
💧 75% 💨 5 km/h
11 AM
Sunny
8°
Sunny
💧 69% 💨 5.4 km/h
12 PM
Sunny
9°
Sunny
💧 63% 💨 6.5 km/h
1 PM
Sunny
10°
Sunny
💧 59% 💨 7.2 km/h
2 PM
Sunny
11°
Sunny
💧 57% 💨 8.3 km/h
3 PM
Sunny
11°
Sunny
💧 54% 💨 8.3 km/h
4 PM
Partly Cloudy
11°
Partly Cloudy
💧 55% 💨 7.6 km/h
5 PM
Cloudy
10°
Cloudy
💧 55% 💨 13 km/h
6 PM
Overcast
10°
Overcast
💧 59% 💨 10.8 km/h
7 PM
Overcast
10°
Overcast
💧 66% 💨 9 km/h
8 PM
Overcast
9°
Overcast
💧 65% 💨 6.5 km/h
9 PM
Overcast
9°
Overcast
💧 69% 💨 5.8 km/h
10 PM
Overcast
6°
Overcast
💧 70% 💨 7.2 km/h
11 PM
Patchy rain nearby
7°
Patchy rain nearby
💧 91% 💨 6.8 km/h 🌧️ 68%

3-Day Forecast

Daily overview for Sammamish, Washington

Today
Cloudy
Cloudy
11° / 3°
🌧️ 0% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 13 km/h
🌧️ Total precip: 0.02 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:17 AM
🌇 Sunset: 08:00 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Partly Cloudy
Partly Cloudy
15° / 6°
🌧️ 0% chance of rain
💧 Avg. humidity: 65%
💨 Max wind: 6.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1
🌅 Sunrise: 06:15 AM
🌇 Sunset: 08:01 PM
🌙 New Moon
🌑 Moon: 0% lit
Sat, Apr 18
Partly Cloudy
Partly Cloudy
20° / 4°
🌧️ 0% chance of rain
💧 Avg. humidity: 53%
💨 Max wind: 5.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:13 AM
🌇 Sunset: 08:02 PM
🌙 Waxing Crescent
🌑 Moon: 1% lit

Best Time to Visit Sammamish

Plan your trip to Sammamish, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Sammamish 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Sammamish?
Current conditions in Sammamish: Overcast, temperature 3°C, humidity 92%.
What is the best time to visit Sammamish?
The best time to visit Sammamish is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Sammamish?
Sammamish is located at approximately 47.6° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Sammamish?
The wettest period in Sammamish is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Sammamish?
For visits to Sammamish during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Sammamish in?
Sammamish is located in United States, in the state of Washington.
What are the public holidays in Sammamish in 2026?
View the 2026 public holidays for Sammamish on our Holidays page.
What are the GPS coordinates used for the weather forecast in Sammamish?
The weather forecast for Sammamish uses coordinates 47.6018, -122.0417.