Hi Gloria, One of the richest bee keeping knowledge bases is found at at this site: https://www.honeybeesuite.com/how-to-wrap-a-hive/

She lives near Olympia and her climate is not far from ours.  She has a lot to say about wrapping with how to photos. Use her sites' search engine and enter "wrap or not" and you will find lots of read.  Here's another of her articles: https://www.honeybeesuite.com/to-wrap-or-not-to-wrap/

BUT to summarize my reading of her posts: Wrapping not needed here in Oregon and seldom done. If you do anything, an insulated cover, screened bottom, some venting up top and a upper exit for cleansing flights, are a proven approach.  I'm using a Winter Shim (see image) but a standard Imirie Shim can be adapted. See attached .pdf on shim.

Our hives are about 1 ft from a fence and have a rain shield perched over them at about 7 ft height.

I have been trying to find sources of coroplast since watching some YouTube videos on insulating hives. But I've been told by Lowes/HomeDepot that the Mfg is focusing on face shields and that supply is constrained due to Covid. I'd love to have some specific recommendations on how to DIY some rain shields. 

I plan on doing something like this beek does for wrapping/insulation this year to try and increase overwintering success.

https://www.youtube.com/watch?v=WaidqYALcaI&feature=youtu.be

https://www.youtube.com/watch?v=qWFR0-yLh9w&feature=youtu.be