Science Winter solstice: Why isn't the shortest day also the coldest?

It will be another month or so before the Northern Hemisphere experiences those truly frigid winter temperatures. Why is there such a big lag between the winter solstice and the coldest days?

By , Inside Science News Service

Kieran Doherty/Reuters

(Inside Science) – Residents of the Northern Hemisphere, don’t worry about the winter solstice – it’s not the middle of winter, and in some places, it’s not even the start of wintry weather.