When Groundhog is unable to sleep, he experiences autumn and winter holidays he never knew about, and then he finally falls asleep before Groundhog Day.

An incident on Groundhog Day reveals the true relationship between Phil the groundhog and his shadow.

On Groundhog Day, the students in Mrs. Connor's class try to find out whether the class hamster can predict the weather as well as a groundhog.

Although she can predict the weather much better than the boys in her family, no one thinks that Phyllis the groundhog has a chance of replacing the aging Punxsutawney Phil when Groundhog Day's official groundhog retires.

When Groundhog realizes he needs helpers all over the country to accurately forecast the weather, he establishes a school to teach young groundhogs how to properly determine when spring will arrive.

"As snow gently blankets the land, the Groundhogs prepare for their long, snuggly hibernation. But little Tess is wide awake. Tess's parents try everything to get her to sleep, but she knows every trick in the book. When Mommy and Daddy fall asleep without her, will Tess be able to stay up all winter? Or will she snore her way through Groundhog Day?"-- Provided by publisher.

Brownie the groundhog encounters a fox while waiting for winter to be over, and through clever maneuvering--and tasty snacks--the two become friends.