Winter Tennis?

This has been an amazingly mild winter, so much that we've been able to play outdoor sports pretty much all season.  When it gets really cold we move indoors to the Rec for swimming or basketball, but what we really love is getting out and playing tennis.  We have been doing alot of that lately, along with a few bike rides, scooter rides and dog walks.  HOWEVER, I might add that if we are not going to get blizzards and snow drifts, I much prefer it hurry up and get to 80 degree weather!