Weather History Offers Insight Into Global Warming.Weather History Offers Insight Into Global Warming. The problems that often haunt other weather records — the station is moved, buildings are constructed nearby or observers record data inconsistently — have not arisen here because so much of this place has been frozen in time. The weather has been taken (at Mohonk House, [map] ) in exactly the same place, in precisely the same way, by just a handful of the same dedicated people since Grover Cleveland was president... That extremely limited number of observers greatly enhances the reliability, and therefore the value, of the data. The record shows that on this ridge in the Shawangunk Mountains, about 20 miles south of the better-known Catskills, the average annual temperature has risen 2.7 degrees in 112 years. Of the top 10 warmest years in that time, 7 have come since 1990. Both annual precipitation and annual snowfall have increased, and the growing season has lengthened by 10 days....But what makes the data truly singular is how it parallels a vast collection of phenological observations taken at this same place, and by many of the same observers, since 1925... (In) Project BudBurst.... volunteers record the way 500 native plants are responding to climate change.