Quote:
Originally Posted by Metro-One
Portland can actually regularly be colder than Seattle and Vancouver during strong outflows, but they are also the warmest during mild influxes. Essentially, they have a larger variation in temps than the other major PNW cities. Seattle and Victoria tend to be the mildest cities during outflows, but of course there are always exceptional days where this can reverse. The snowiest locations are Squamish, The Fraser Valley, and Blaine Washington.
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Yes, I know Portland is colder and hotter than Seattle under certain conditions. Its highs can get over 40C in heatwaves - hotter than Seattle, and considerably hotter than Vancouver.
Also, during cold snaps, the pool of frigid air gets over-ridden by incoming Pacific flows, and Portland gets regular ice storms - not just a film of ice, but thick coatings of it.
I have rarely seen anything like that in Vancouver. One morning, watching KIRO 7 Seattle news, they were glazed in ice, skidding all over Hell's half acre while in Vancouver it was raining.