I have them too for headlight refits. having worked in the heavy truck industry for years pulling trailer with LED tail lights, I can tell you from experience that they do 'snow over'.
The city south of us switched all their traffic signals to LED and then had to add heaters to the lenses because they were icing over....
I think it's a case-by-case basis however. In as much as I don't drive my pickup truck in the winter here in Michigan, it's a non issue for me.
I know I can see a lot better and farther than with the Halogen bulbs I had before.