What is the difference between Partly Cloudy and Partly Sunny?
They essentially mean the same thing. Partly Cloudy can be used during the day or night, while Partly Sunny should obviously only be mentioned in the forecast during daylight hours. They are both supposed to represent sky conditions where between 32% and 69% of the sky is predominately covered by clouds. This is more of a generalization for the time period in question, and does not mean that skies couldn’t be nearly clear or totally cloudy for brief periods.