And the thread is back from the dead!
As far as temperature goes, I think Backblaze disagrees.
I also vaguely recall a google study from several years ago now that curiously found the opposite, that warmer drives last longer than cooler ones, but I could be misremembering.
From my own anecdotal evidence, I have been running my NAS server in an un-air conditioned basement for 4 years, where in the summer temps often reach 90 degrees or above, and have not seen an excessive drive failure rate.
Sure, and I have a hitachi 2.5'' 500gb drive thats now 7.5 years old in a dell laptop that runs every day (knock on wood) between 45-52C. Doesn't mean I don't perfer my hdd's to be around 30-40C.