I've hunted BT in CA,OR, & WA.
Much of it has been in the rain (at least in OR & WA).
It seems that the animals in CA (specifically A & B zone) got really active at the first shot of rain.
I remember taking a few on the first day of rain after months of dry weather.
I think it often works in reverse up north.
A little shot of sun after a few days of rain is sometimes just what you need to see animals on the WA & OR coast.