A Blog of Current Events and Ancient Issues.
I worked in the National Climatic Data Center archives for a couple months. If you can guess the largest group of non-governmental users of archived weather data, by occupation, you win the prize of having guessed correctly.
Lawyers. For example, to determine the environmental conditions when and where an incident took place, or to verify or challenge a witness's recollection. "You said, Mr. Jones, that it was foggy and dark that morning, so you couldn't tell what kind of car the perpetrator was driving. According to these weather records taken by instruments and human observers at the Orlando airport, however, the sun rose at 6:12 a.m. that morning and it was sunny and clear all day!"