As long as powerful AIs require huge data centers with hundreds of millions of dollars worth of GPUs, this is impossible. Nuclear war would destroy the global chip supply chain, so only salvaged processors could be used.

We don't have reliable records of daily temperature measurements going far back, but we can still derive historic seasonal temperature with tree ring and ice core data reliably.

Accurate daily comparisons over the last several decades can also be made, and there has been substantial change in the last several decades.

Pocket watches were invented far earlier that the wrist watch and were widespread by the 1600s. They weren't replaced by the wrist watch in popularity until World War 1.

I imagine that the 0.3% smoking pipes also go to class wearing dapper sweater vests and have waxed mustaches