It will definitely snow in Reno during winter but then that's what separates the REAL tennis players from the posers!
this is Reno Tennis Club at Washoe courts, (semi private club)
P.S. locals do not use high altitude balls - those are for the wimpy tourists! Elevation about 4400 ft.
You said you like kayaking? There is a whitewater park downtown
- right next to some courts too, (4 courts I believe) so go play a few hours of tennis then go jump in the river!