i posted all of this stuff years ago - it's in here somewhere if you want to look for it - but the way i understood what i read is that when the sun reverses polarity it more or less reverses the jetstream in the northern hemisphere, and if you sit and think about this for a second, it's actually kind of intuitive and easy to grasp. if you imagine the jetstream as a wave with an amplitude in the presence of a magnetic field, then flipping the field really ought to flip the jetstream, too.
anything oscillating in a field should flip if you flip the field. and, that's essentially all that the research says, albeit in a complicated way - the sun shifts polarity, which flips the oscillations, which shifts the jetstream.
the last string of exceedingly hot summers ended here about 2016, which would have been a few years after the last peak. the near future, in this region of the world, will be at least a little warmer, as we move into the next cycle.
but, are we there yet? we shouldn't be; if we are, we don't understand why. then, is it variation? or is it an example of the solar effects being overrun by the oceans?