And definitely less true elsewhere in the region. To Dare Duck's point earlier, in no way is SEA singularly representative of the region, and in this spring's case it's pretty obvious that it is not accurate to characterize it as "average" for the region for temperatures under any context. It was another warm to very warm season.
For PDX, it was the 5th warmest spring on record (since 1941). It came in +1.4 on the regression line and +2.1 on the 30 year moving average.
Fairly similar story for OLM, SLE, EUG, MFR, GEG, YKM, PDT, RDM etc. though the rankings obviously depend somewhat on the length of the period of record.
Ah, you choose to go SUPER regional when it fits your point.
As you well know, my points about last summer pertained to the lowlands of the western PNW...you know, Seattle, Portland, etc. That climate region.
Here's where the summer ranked for the major westside stations. As you can see, most were not close to 4th warmest.
BLI: 12th
SEA: 14th
OLM: 11th
PDX: 7th
SLE: 6th
EUG: 3rd