5-day weather forecast for Mercer Island, Washington

Weather changeability for Seattle, Washington

Temperature Last Month Last Year
Average change in high temperature day-to-day 2.8° 3.9°
Average change in low temperature day-to-day 5.4° 3.9°
Precipitation Last Month Last Year
Chance of dry day after a precip day 33% 29%
Chance of precip day after a dry day 63% 24%

Weather forecast accuracy for Seattle, Washington

Last Month
The Weather Channel   89.42%
Weather Underground   89.25%
AccuWeather   82.69%
Foreca   82.05%
Dark Sky (forecast.io)   76.60%
NWS Digital Forecast   76.58%
MeteoGroup   72.44%
World Weather Online   63.46%
Persistence   49.04%
Last Year
The Weather Channel   83.49%
Weather Underground   82.88%
AccuWeather   81.46%
Foreca   79.70%
Dark Sky (forecast.io)   78.15%
MeteoGroup   78.12%
NWS Digital Forecast   75.66%
World Weather Online   66.96%
Persistence   57.23%

ForecastAdvisor Fact

0.0% of AccuWeather's high temperature forecasts for Seattle were off by more than 10 degrees last month.