That ocean proximity keeps it real consistent in the winter, it rarely freezes, and when it does it's more like 28f-25f.
That is true usually, but once in awhile (not every winter, but at least every few winters) we get one of those arctic fronts that funnels cold air into the Salish Sea via the Fraser Valley. When that happens we usually end up below 20°F and sometimes below 15°F, with highs below freezing for a few days straight.
Sorry about straying off topic, but so far avocados have been very happy with the cold rain and regular mildly freezing temperatures, though they get zapped back to ground level during those bad freezes. Here's the worst freeze since I started recording temperatures for the avocado project, and this killed most of the trees outside:
Both of the last two winters were La Niña years, so that means more cold weather chances here. These reports show the 2021/2022 and 2022/2023 winter seasons (Nov to March), which included hundreds of hours below freezing:
By contrast, this current winter low is about 28°F and all the avocados seem very healthy in the ground outside, some are even pushing their spring flushes already! Here's one of those (the Northrop cultivar, which just barely survived last winter and is much happier with how this one is going):