Groundhog.org, official website of the bizarre tradition in a small Pennsylvania town that gets international attention, reported: "Phil Says 'Six More Weeks of Winter!'"
The forecast is based on whether the marmot, after being woken from hibernation each, can see his shadow. If he does, spring is another six weeks away. If not, winter is over.
According to the site, Phil announced to a select group of handlers who wear top hats and are known as the Inner Circle: "A bright sky above me showed my shadow beside me. So six more weeks of winter it will be."
Meanwhile, New York's NY1 television reported that a rival groundhog did not see its shadow following unsuccessful attempts byto lure the creature out of its shelter at a city zoo.
In Punxsutawney, the Inner Circle scornfully dismissed Bloomberg's photo opportunity.
"Punxsutawney Phil is the only true weather forecasting groundhog. The others are just impostors," groundhog.org said.
The tradition has its roots in an old wives' tale brought by German immigrant farmers.
Punxsutawney held its first Groundhog Day in the 1800s, according to the website. The current spectacle, which has become a tourist attraction and was the subject of a Hollywood comedy with Bill Murray in 1983, first took place on February 2, 1887.