We went this year in January...actually the 20th for a week and the weather was fabulous. We wore shorts or capris every day and tshirts. We would take jackets/sweaters but rarely needed them. We swam eevery afternoon in the cbr pool and it was sunny. One day of rain...one evening of rain but great weather.
We are planning on 10 nights next January!
ALso....buses and parks were quiet!