Finding Streaks with values of 70°F or higher

I obviously missunderstood word "streak"...

But this is what I came with (year 2002) with two helper columns (you can hide them if you want)...
of course, if Fotis solution works then go with it since this is giving you othar kind of result but since I've already made it, here it is.
I've also removed several sheets due to file size.