> I think it would be cool to have historical weather data from around the world to analyze for signals of climate change we’ve already had rather than think ab

> I think it would be cool to have historical weather data from around the world to analyze for signals of climate change we’ve already had rather than think about potential future change. This is a very good instinct! A pretty major portion of modern climate science is paleoclimatology, with a goal of reaching far beyond reliable human measurements. A lot of earth's previous climate states were wildly different from the range of conditions we have experienced in the past 10,000 years, and a better climate record is essential to predicting the effects of massive carbon emission. Ice cores from Antarctica/Greenland are the most famous instance of this, but there's a lot of other cool ones - there are chemical records of climate change in cave stalactites, ocean floor sediments, etc.