But they're not actually being broken because they've downgraded past temperatures, discounted others entirely, and adjusted the current readings higher to correct for the cooling factor from urban heat island effect.
There is many a now urban temperature station with a 5 degree shift in the data, to account for those pesky cooling factors, like air conditioner vents, and blacktop.
It's like when certain ingredients are combined to make a soft and chewy, toffee-like substance... the figures have been 'fudged'
Sure the computer models forecast a future of 'global warming' doom and gloom, but we all know that computers can only arrive at conclusions based on the data fed into them, and if that data is flawed, inconclusive or plain just tampered with, then the results are going to be less than accurate. Thing is, the 'global warming' scientists and researchers fed in the data they were told and the desired results... er, intended results were delivered.
It is said that computers don't lie, and maybe that's true, but their users/handlers sure as hell can.... and do... just sayin'.