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 4.7° 3.9°
Average change in low temperature day-to-day 2.3° 3.9°
Precipitation Last Month Last Year
Chance of dry day after a precip day 0% 29%
Chance of precip day after a dry day 0% 24%

Weather forecast accuracy for Seattle, Washington

Last Month
MeteoGroup   95.77%
Foreca   95.00%
The Weather Channel   94.72%
Weather Underground   94.72%
AccuWeather   94.44%
Dark Sky (forecast.io)   92.22%
NWS Digital Forecast   87.78%
Persistence   79.60%
World Weather Online   59.72%
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

75.7% of NWS Digital Forecast's low temperature forecasts for Seattle were within 3 degrees of actual temperatures last year.