November in Vietnam
 

Just how warm and humid will it be in Vietnam? Will be traveling from south to north. My hair tends to frizz when the humidity is high. Am wondering if I should just get it cut short!!?

Your hair will definitely frizz up. Cut it short and forget about it.

The weather in the south is warm around year, pass Hai Van Pass ( Da Nang ) in November it is winter in the north , it is cold.
you should have your hair cut.

I was in central vietnam in November and while they considered it "winter" I considered it deep summer. It was hot and muggy. And rainy.

I was in Hanoi in November. While they consider it winter, it was comfortably warm, in the 70s and 80s.