... kakšno vreme je bilo na nek dan pred 31-imi leti?

Težko.

http://www.wolframalpha.com/

vtipkaš ''weather in (mesto) on (datum)'' in dobiš upam da ma podatke, no, do zdej me še ni pustu na cedilu


_____________________________

Accept certain inalienable truths: prices will rise, politicians will
philander, you too will get old. And when you do you’ll fantasize
that when you were young prices were reasonable, politicians were
noble and children respected their elders.

O, hvala.