Oh dear! Not very I am afraid. I found this in an article.
According to Stormfax.com, Punxsutawney Phil has only been correct approximately 39% of the time. Of course, long range forecasts can be difficult to predict for the human forecaster. For example, the 2012-2013 winter outlook for the United States was supposed to have equal chances to see a wet/dry and cold/warm winter as the lack of an El Niño and La Niña made the forecast rather difficult to predict
article is here.
http://earthsky.org/earth/groundhog-day-2013-how-accurate-is-punxsutawney-phil
So given that random guessing should produce a 50% success rate, can we say that Punxsutawney Phil is misleading?
Phil's 39% correct is a heck of a lot better than Obama's 0%.
I say we run him (Phil) for the presidency next time.