Summer Begins in Northern Hemisphere

This full-disk image from NOAA's GOES-13 satellite was captured at 7:45 a.m. EDT (11:45 UTC) and shows the Americas on June 21, 2012, the start of astronomical summer - in the Northern Hemisphere - that year. The first day of summer in 2025 is June 20; it is also the longest day of the year. […]