Yes absolutely.
Just think of all the ball pythons that survive years of neglect with minimal heat in 40 gallon breeder tanks. These guys thrive with specific environmental conditions, but they are still quite hardy and able to handle a few days without a 90 degree hot spot. Heck, I know I'm not the only one who has seen snakes spend a week or more at a time at the cool end of the tank.
Low to mid 80s are great temperatures to have during a power outage, your snakes will be perfectly happy. 75 and up is still good for two days.
Good luck with the storm.