Historical Driest Part Of The Year Ends

By Rod Hill on 2010-08-26


The Portland record book shows the driest weeks of the year are typically July 11th - August 22nd.  With an exception or two, the climate daily rain chance is 5-15% through the stretch of days.  This summer has been dry even by our summer standards!  Dating back to July 3rd, PDX has recorded .02" of rain through the 25th of August!  This is the driest stretch over the mentioned days since I began keeping records in 1999!  Including the summer of 2003, when July recorded a trace for the entire month.  The historic daily rain chance averages 25% August 23rd through Sept. 13th.  After which, the odds of rain increase has we get into the first weeks of fall.  

With all the talk of cloudy mornings this summer and a lack of extreme heat compared to a year ago, the headline of how bone-dry we have been has gotten lost.  If the forecast holds true, much of the metro area will see passing rain showers this coming Monday.  The rain would be a welcome sight to your lawn and mine!