Spring Coming Earlier: Number of Days (National)
- Our warming climate is causing spring to arrive earlier across much of the U.S. Our analysis finds that spring ‘leaf out’ is happening earlier in 76% (181) of the 239 cities analyzed, compared to 1981. The most dramatic changes are in Flagstaff, Ariz. (18 days earlier), followed by Colorado Springs, Colo. (17 days) and Reno, Nev. (17 days).
- Earlier springs create a mismatching in availability of food (and other resources) with important natural events such as migration, hibernation and reproduction.
- It might seem appealing to shake off the winter cold sooner, but earlier springs can have negative consequences such as longer allergy seasons, more persistent pests (like mosquitoes), and risks to fruit production.