Members don top hats and tuxedos for the ceremony on Groundhog Day each year.
Bill Deeley, president of the Inner Circle, said that after "consulting" with Phil, he makes the call in deciphering what he has to say about the weather.
Phil is known as the "seer of seers" and "sage of sages."
Organisers predicted about 20-thousand people this weekend, a larger-than-normal crowd because Groundhog Day falls on a weekend this year.
The 1993 movie "Groundhog Day" starring Bill Murray boosted awareness of the Pennsylvania party.