A Mild September Start

Let the last Summer holiday begin.  Here’s the holiday outlook and what may happen through early September 2025.  ☕️ Ready?

Labor Day Holiday:  Delightful conditions!  An organized Low pressure ‘cell’ is off the PNW coast and is modeled to essentially ‘park’ there through the long weekend.  This helps to cool down afternoon highs into the 80s in most locations, along with holding off any rain or showers.  Excellent conditions for all outdoor activities.

Next week will yield another HEAT UP around the region, with Tue being the cooler day of the week.  Temps will broadly pop back up into the 90s Wed & Thu, Sep 2,3. Fri the 4th should be a few degrees cooler with an onshore flow increasing.  

Sep 5,6 weekend is trending dry & mild, with temps holding in a pleasant range, given an onshore flow.  Late Sunday afternoon, Sep 7, a weak cold front is charting to drop south along the BC coast, bringing with it clouds, chance for showers and notably cooler temps for a couple of days.  Most of the risk for precip should remain over the Puget Sound region; some cloudiness is likely on Monday the 8th elsewhere.  Note that this system will spark quite a decent “fall storm” over ID, MT & WY.

Week of Sep 8-12 is trending dry & warmer for Tue & Wed, then another cold front is charting to drop in, much like the previous one, threatening some rain & showers overnight Wed the 10th & Thu over Vancouver Is and the Sound; lots of clouds elsewhere south to Portland, maybe Salem.  The Mt Angel Oktoberfest starts on 9/11. 

Weekend of Sep 13,14 looks dry and mild, with an onshore flow that may be strong enough to keep a morning marine cloud deck overhead during the morning hours. The Mt Angel Oktoberfest continues through Sunday the 14th.

Bottom line: the first half of September is likely to remain dry - other than a few showers over the far NW area of WA and southern BC - with seasonally mild temperatures.  Nationally, there are no hurricanes threats indicated on long-range wx charts through mid-month.