Will the Benefits of Global Warming Last through the Winter?

Usually once fall soccer season ends, that's it for outdoor sports-- aside from snowboarding and sledding-- but this year my son Ian and I have had a chance to play tennis nearly every day . . . he's hit more tennis balls in the past few weeks than he previously hit in his entire (rather short) career, and because of all this practice, Ian is really nailing both his forehand and backhand, he's hitting crosscourt and down the line shots, he can serve a bit, and he's coming to the net . . . not only that, but I've developed a brand new top-spin two handed backhand that i can hit with power and accuracy . . . so the question is: will our well-honed strokes last through the winter snow, or will they melt away with the spring thaw?