Weather is the
short-time-scale (< a few days) evolution of the of the atmosphere.
Climate is the statistics of weather.
Weather prediction. The
evolution of the state variables of the atmosphere is
governed by nonlinear dynamics (i.e. “chaos”), and is
therefore inherently unpredictable beyond a certain
period of time.
Climate prediction. There
is no reason to doubt the predictability of the
statistics of weather.