Leaflet.org

Meteorological fall started on September 1, but if you live in the contiguous U.S., you may not have noticed the typical crisp, cool air. That’s because the season has been steadily warming for decades. Since 1970, average fall temperatures have risen in every single county in the country.On average, fall temperatures are now a remarkable 2.8°F warmer than they were in the early 1970s. This Maps Mania… more →