Usually, UA, I hold to the maxim that "when the weather gets bad, the drivers get worse"; however, I've noticed this winter that, when the weather turned foul, I had courtesy extended to me from drivers! Of course, as soon as it started getting better, speeds got faster and drivers got more rude -- buzzes and the occasional honk.
I don't envy you the night ride, though -- some folks I've seen around here, who SQUINT TO READ LARGE PRINT because they're too vain to wear their specs, are out on the roads at night! I have light a-plenty, but damned if I trust them!
+10 on the sub-20 rides; primal, isn't it?