NOAA is predicting cooler then average temps all along the east coast for this summer. That's actually good news in the long term for thru-hikers, even if that means the snow here in NH and Maine will take longer then normal to melt. (High of 17 today, with sub zero wind chills and lows around 0 tonight, again).
But the bad news is it will be hotter then average out west for the PCT and CDT, which probably means drier and more forest fires too.