Right now the "Normal High" is 93 where I live. What is referred to as "Normal" is really called "The 30 year average". Why not 100 year average or 5 year average.
It's because we know over the long or short term, the climate will fluctuate.
It does not mean that any days above 93 are abnormal.
The Petrified Forest is now a Desert. The Central Valley of California has fossilized Reef's so you yes the Climate does change. Always has, always will.