Dew points have always been a mystery to me (I do kind of understand, lol) so I take no notice of them really (and I don't have the time or inclination to faff about on the computer in a morning checking what it is each day). I live in a very dry climate and that suits me and my hair fine. I know if it's humid my hair's going to be a mess so I just tie it up. That's about as much factoring of the climate I do!
3b in South Australia.