Maybe brutal in the sense of cold and foggy when people expect it to be sunny and warm.

Sorry, I know. It's a very spoiled statement. I mean they're just unexpected in SF (especially the western side of the City).

It tends to be cold, wet, damp, foggy and bone chilling early morning. Not like Winters/Summers in Chicago brutal, but definitely the time I struggle with most (as a new yorker who clearly has to weather acclimated here, I know it sounds ridiculous)

84º days are brutal once you're acclimatized to 68º summers, especially in a city built for a cold windy climate.