"Upper Thailand gets warmer" That's true, somewhere between Noon and 4pm it's t-shirt weather, but once the sun hits the horizon the layers go on. Best time of year to get outdoor work done.
Economics 101 basic stuff we learned in high school: When demand is way down drop prices way down to encourage more business. Thai economics: When demand is way down charge more money to compensate for losses. Never mind that way less people will pay. Seriously, who the F wants to come to Thailand when the government keeps inventing reasons to stay away? I sure as hell wouldn't come here again as a tourist. The days of "Land of Smiles" are wayyyy over.