We are going to have quick visit to macau by may 7-10, 2016. What is the weather that days?

It may be cloudy during that period of time. The temperature will range from 70F to 80F. You are advised to take light jacket, shirts, and pants.
You may go to see Ruins of St Paul's, Senado Square, A Ma Temple, Fisherman's Wharf, Venetian, Taipa Village, etc. Have a nice trip!