Click here to see the month by month calendar for USTA Cat 1 and Cat 2 Tournaments. (then click on 2016 for 2016 Schedule).
Or copy this link: https://m.tennislink.usta.com/tournamentsearch/searchresults.aspx?Action=8&Division=&Category=0&SectionDistrict=NA&Year=2015
This also includes family and wheelchair tournaments.