Okay, so he didn't "fail" to see it. It just wasn't there.
"On February 2, Phil comes out of his burrow on Gobbler's Knob - in front of thousands of followers from all over the world - to predict the weather for the rest of winter."
"According to legend, if Punxsutawney Phil sees his shadow, there will be six more weeks of winter weather. If he does not see his shadow, there will be an early spring."
". . .
On this Groundhog Day we think of one thing.
Will we have winter or will we have spring?
On Gobbler's Knob I see no shadow today.
I predict that early spring is on the way."