L'hiver VA de novembre a Fevrier....?
I agree. And what about L'hiver dure de novembre a fevrier?
Disallowed, maybe because the English doesn't have "lasts".
Why not L'hiver va de novembre a fevrier? This inconsistent with previous sentences like it.
is the article always obligatory ???
for The winter? Yes :) always in front of seasons except when you want to say IN the winter in which case it is en hiver and not en l'hiver, but otherwise yes. Hope this helps