I am not sure if you are speaking from experience or looking at weather data, but in 13 years I have never seen indoor humidity high enough to make mold likely. Higher humidity with cool temperatures does not feel like high humidity with high temperatures, which can be unbearable. I sweat profusely in the latter conditions and not all all in the former.
Lived in the Presidio, all my neighbors plus our house has a pretty big mold problem, likely from the humidity. When we called maintenance, the answer was to manage airflow and yeah, it’s the presidio, stuffs gonna mold.
To be fair, the Presidio is the foggiest/most humid part of SF. Any part of the city & broader Bay Area directly touching coast line attracts dramatically more moisture than anywhere even a few hundred meters inland. Even in the Marina district half a mile away mold isn’t an issue afaik
To be double fair, it sometimes felt that the Presidio was only technically part of SF. We used to joke that it was really Marin's foothold on the peninsula.
It may have to do with a combination of location (like around great highway, for example) and age of the buildings, design and along with materials used in construction. Modern/ish buildings are likely unaffected.
No, it's very noticeable. Instead of being hot and damp you've got cold that chills you to the bone and you're still really sticky and damp. It doesn't hurt that things stay very foggy so you can pretty much see the humidity (but not the silver painted trams).
Yes, there are a lot of microclimates here and I suppose in some mold could be likely.
To that point though, most of the neighborhoods I have lived in have had little to no fog. Russian Hill being the exception. I’m not sure how much of a difference that makes in indoor relative humidity or chance of mold.
