(Complete List of Average Temperatures) Use the near real-time water temperature … The coldest month is January with an ø water temperature of 39°F / 3.9°C. Summertime water temperatures in our rivers and streams range from the upper-30s to mid-40s while temperatures in Lake Washington and Lake Sammamish usually remain in the 40s, … "),d=t;a[0]in d||!d.execScript||d.execScript("var "+a[0]);for(var e;a.length&&(e=a.shift());)a.length||void 0===c?d[e]?d=d[e]:d=d[e]={}:d[e]=c};function v(b){var c=b.length;if(0=c.offsetWidth&&0>=c.offsetHeight)a=!1;else{d=c.getBoundingClientRect();var f=document.body;a=d.top+("pageYOffset"in window?window.pageYOffset:(document.documentElement||f.parentNode||f).scrollTop);d=d.left+("pageXOffset"in window?window.pageXOffset:(document.documentElement||f.parentNode||f).scrollLeft);f=a.toString()+","+d;b.b.hasOwnProperty(f)?a=!1:(b.b[f]=!0,a=a<=b.g.height&&d<=b.g.width)}a&&(b.a.push(e),b.c[e]=!0)}y.prototype.checkImageForCriticality=function(b){b.getBoundingClientRect&&z(this,b)};u("pagespeed.CriticalImages.checkImageForCriticality",function(b){x.checkImageForCriticality(b)});u("pagespeed.CriticalImages.checkCriticalImages",function(){A(x)});function A(b){b.b={};for(var c=["IMG","INPUT"],a=[],d=0;db||1342177279>>=1)c+=c;return a};q!=p&&null!=q&&g(h,n,{configurable:!0,writable:!0,value:q});var t=this;function u(b,c){var a=b.split(". "I don't like the water until it's a couple degrees above 60," Lorton said. (in development). December is the coolest with 39°F / 3.9°C avg. Lake Coeur D Alene is a city close to Lake Coeur D Alene. And now for Lake Washington, ... King County tests lakes for bacteria and water temperature once a week from May through September. google.charts.load('current',{packages:['corechart']});google.charts.setOnLoadCallback(drawChart);function drawChart(){var data=google.visualization.arrayToDataTable([['Year','Max.','AVG','Min.','Max.','AVG','Min. WATERTEMPERATURE.NET - Wordwide Water Temperatures. August is the month with the hottest water temperature at 69.1°F / 20.6°C. Based on our historical data over a period of ten years, the warmest water in this day in Puget Sound was recorded in 2016 and was … air temperature is around 65.8°F / 18.8°C, August is the month with the highest temperature. !b.a.length)for(a+="&ci="+encodeURIComponent(b.a[0]),d=1;d=a.length+e.length&&(a+=e)}b.i&&(e="&rd="+encodeURIComponent(JSON.stringify(B())),131072>=a.length+e.length&&(a+=e),c=!0);C=a;if(c){d=b.h;b=b.j;var f;if(window.XMLHttpRequest)f=new XMLHttpRequest;else if(window.ActiveXObject)try{f=new ActiveXObject("Msxml2.XMLHTTP")}catch(r){try{f=new ActiveXObject("Microsoft.XMLHTTP")}catch(D){}}f&&(f.open("POST",d+(-1==d.indexOf("?")?"? Summer is when the water seems most attractive. Make the Most of the Rest of It. July is the month with the lowest precipitation of 0in / 0mm and December with the highest precipitation in a year with 2.4in / 60.3mm. Picture Copyright: Flickr CC 2.0 ChrisYunker. 3. 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