i'm in reno, nv so it can get quite cold in the winter.
This is the rain sheet (they don't have the exact one that I have anymore as it's 6 years old at this point but this is the updated version - Bucas Sun Shower Turnout) and this is the turnout blanket (Bucas Power Turnout) for winter. Something more like the sun shower turnout might work best for you.
I just looked at those turnouts, I LIKE those! Those might have to be a goal for me.