Point Forecast: Mercer Island WA
 47.58N 122.25W (Elev. 105 ft)
Last Update: 8:00 pm PDT Jul 13, 2025
Tabular Forecast
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Weather ElementsWeather/PrecipitationFire Weather
Temperature (°F)
Dewpoint (°F)
Heat Index (°F)

Surface Wind  
Sky Cover (%)
Precipitation Potential (%)
Relative Humidity (%)
Rain
Thunder
Fog
Mixing Height  
Trans. Wind  

48-Hour Period Starting:       Back 2 Days  

Date07/1307/14
Hour (PDT)222300010203040506070809101112131415161718192021
Temperature (°F)747169686766656463636264646566676971727472727269
Dewpoint (°F)626059595958595858585759596060596060596159585958
Heat Index (°F)
Surface Wind (mph)787887766665535555556776
Wind DirNENENENENENENENENENNENNENNENNNWNWNWNWNWNWNNWNWNNWNNWNNW
Gust
Sky Cover (%)21313527233338486173788187788082645348372712910
Precipitation Potential (%)323333311211110000000000
Relative Humidity (%)666971727676808285838484838381767369646364626467
Rain------------------------------------------------
Thunder------------------------------------------------

Date07/15
Hour (PDT)222300010203040506070809101112131415161718192021
Temperature (°F)686664636261616061626365687174777980818282818077
Dewpoint (°F)585655555554555455565657585960605958575758585958
Heat Index (°F)777981818282818177
Surface Wind (mph)655555533355577799988877
Wind DirNNNENNENNENENENENNENNENNENNNNNWNNWNNWNNWNNWNNWNNNNN
Gust
Sky Cover (%)977755555577744433355555
Precipitation Potential (%)011111100000000000000000
Relative Humidity (%)707173757779808181807875716661565147444344464952
Rain------------------------------------------------
Thunder------------------------------------------------

Additional Forecasts and Information
International System of UnitsForecast Discussion
7-Day ForecastHourly Weather Graph
NWS GIS Viewer (previously user-defined area forecast)