Climate Central: The summer solstice is right around the corner this Saturday and temperatures around the U.S. have started to rise to the occasion. But it's not just a warmup from spring to summer that's occurring: summer temperatures have been steadily rising since 1970.
On average, temperatures have increased at a rate of about 0.4°F per decade in the contiguous U.S. since 1970, or nearly 2°F overall. But some areas have been warming much faster, and others more slowly.
The fastest warming "climate divisions,'...