Kate wrote:
I have my Christmas lights plugged into several outside GFCI electrical
outlets.

They do have waterproof covers on them, but with the lights being
plugged into the outlet, I don't believe it is adequate coverage to
protect it from the rain and snow.

Would it be safe to simply tie a plastic bag around it? Any other ideas?

Many thanks.

Kate
Hi,
For years I plug light strings into GFCI outlet outside. Now using all
LED lights power consumption is very low. Not even single time GFCI
tripped. I live in Southern Alberta. BTW, tonight it is near -20 deg. C
with some snow on the ground. My lights are already in operation.
You know pure water is not a good conductor.