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 4.1° 3.9°
Average change in low temperature day-to-day 2.8° 3.9°
Precipitation Last Month Last Year
Chance of dry day after a precip day 100% 29%
Chance of precip day after a dry day 3% 24%

Weather forecast accuracy for Seattle, Washington

Last Month
MeteoGroup   89.25%
The Weather Channel   87.63%
Weather Underground   87.63%
AccuWeather   84.28%
Foreca   83.87%
Dark Sky (forecast.io)   82.80%
NWS Digital Forecast   82.53%
Persistence   69.89%
World Weather Online   68.55%
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

0.7% of NWS Digital Forecast's high temperature forecasts for Seattle were off by more than 10 degrees last year.