It is fall and Eratigena atrica is looking to mate. They are not coming to get out of the cold, they are just on the move searching for another. That they are in your sink or shower just means that they ended up there while trying to get a drink and can't get out. Their webs are flat, a bit messy and have a funnel at one end. They were introduced (accidentally I am sure) to North America from north western Europe in the early 1900's.
Claudia Copley, a local spider expert demonstrates aptly in this video how there is nothing to fear from these guys; "they are our allies". There are similar spiders that are moving about this time of year, including the hobo spider. The Garry Oak Ecosystem Restoration team had this great information sheet done up to tell the difference. The scientific name has changed since this was produced and what is Tegenaria duellica in there is this species. From what I could tell, there have been a number of taxonomic revisions.