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CheckWeather USCity of Sammamish
Forecast confidence: High · models disagree by 4°F

City of Sammamish weather

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Partly cloudy,much the same tomorrow

NWS, the American and the European model agree on a high near 70° in City of Sammamish today. Tomorrow looks cloudy around 71°, with a 0% chance of rain.

70°52°
71°49°
72°50°
71°48°
68°49°
66°48°
Todaymodels agreeTomorrowmodels agreeSundaysplit ±6°Mondaymodels agreeTuesdaymodels agreeWednesdaysplit ±5°
NWSNational Blend (NBM)
72°
Partly cloudy
Today 72°·Low 51°·Rain 0%
AmericanNOAA GFS
68°
Cloudy
Today 68°·Low 52°·Rain 0%
EuropeanECMWF
71°
Clear
Today 71°·Low 52°·Rain 0%
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City of Sammamish weather alerts and warnings

active National Weather Service watches, warnings and advisories

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City of Sammamish weather in numbers

from 30 years of measured normals

City of Sammamish swings 46°F across the year, from 80°F highs in July to 34°F lows in February, and December is usually the wettest month in a year that brings about 55 in of precipitation.

Warmest month
July
80°F average high
Coldest month
February
34°F average low
Wettest month
December
55 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
May, June, August and September
Residents
46,000
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The weather map: all three models at once

NWS, American, European side by side around City of Sammamish and nearby towns.Live rain radar →
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City of Sammamish hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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City of Sammamish 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Partly cloudy
70° 52°
models agree
Tomorrow
Cloudy
71° 49°
models agree
Sun
Partly cloudy
72° 50°
±6°
Mon
Cloudy
71° 48°
models agree
Tue
Cloudy
68° 49°
models agree
Wed
Partly cloudy
66° 48°
±5°
Thu
Cloudy
65° 50°
±7°
Fri
Cloudy
65° 48°
±5°
Sat
Cloudy
66° 43°
±9°
Sun
Cloudy
68° 47°
±13°
Mon
Light drizzle
66° 49°
±15°
Tue
Cloudy
64° 51°
±13°
Wed
Cloudy
58° 47°
±5°
Thu
Drizzle
62° 45°
±6°

City of Sammamish, Washington (WA) is at its warmest in Jul (average highs near 80°F) and coldest in Feb (lows around 34°F), with roughly 55 in of precipitation across the year. Below, compare what NWS, American, European forecast for City of Sammamish right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

City of Sammamish climate by month

average daytime high and overnight low across a typical year
Jan
46°
35°
Feb
46°
34°
Mar
52°
35°
Apr
55°
39°
May
66°
46°
Jun
70°
50°
Jul
80°
56°
Aug
78°
56°
Sep
70°
52°
Oct
60°
45°
Nov
50°
38°
Dec
48°
37°

Which forecast is most accurate in City of Sammamish?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
90
/100rank #1
92±0.8°F96±1.2 mph8290% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
84
/100rank #2
84±1.6°F97±1.0 mph7687% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±4°68° to 72°models agree0% to 0% chance
Tomorrow±2°70° to 72°models agree0% to 0% chance
Sun±6°70° to 75°models agree0% to 0% chance
Mon±3°70° to 73°models agree0% to 0% chance
Tue±3°67° to 70°±2%0% to 2% chance

The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in City of Sammamish

today, local time
Sunrise
06:49
Sunset
19:13
Daylight
12h 24m

Common questions

What's the weather in City of Sammamish today?
On this page we show what NWS, American, European each forecast for City of Sammamish today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in City of Sammamish today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for City of Sammamish and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for City of Sammamish?
Over the last 30 days, the European model has been the most accurate for City of Sammamish (CheckWeather Score 90/100), ahead of the American at 84. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in City of Sammamish?
July is typically the warmest month in City of Sammamish, with average highs around 80°F.
How cold does City of Sammamish get?
The coldest month in City of Sammamish is February, when overnight lows average about 34°F.
How much rain does City of Sammamish get?
City of Sammamish sees roughly 55 in of precipitation a year, with December usually the wettest month.

Nearby

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