Unlike the predictability of daily summer shows,
Winter rains are the exception for any given day.
Can you see that on the graph above?
The black line (i.e. the long-term median daily rainfall) practically flat-lines at zero between the months of November to April. The good thing about early winter rains is that they don't get (as) diminished by evapotranspiration.
That means drop for drop the swamp keeps more of that rain.
Caveat: That's assuming it ever cools down!