After a brutal winter that included extended deep freezes and a couple of monster snowstorms, we have reached the light — some light, at least — at the end of the tunnel. The vernal equinox occurs at 10:46 a.

The official arrival of the season depends on an astronomical event called the spring equinox.

Meteorologist Dylan Robichaud takes a look at why the seasons change, and when you can expect to see our first 90° weather