Despite this being a solidly cool May in the Puget Sound region, the number of cool "fall-like" days pales in comparison to some truly cold Mays.
SEA had 9 days this month that failed to get out of the 50s.
In 2022, they had 17. In 2011, they had 15. In 2010, it was 13.
Going back further, 1999 had 18 such days. And going way back, 1962 had 20.
Definitely more below average than above. Solidly below normal regionally, though not May 2022 level.
BLI: -2.0
SEA: -1.8
Seattle WFO: -.9
OLM: -.7
Downtown Portland: -1.7
PDX: 0.0
Hillsboro: -1.5
SLE: -.7
EUG: +.2