South Florida gets about 5 of those per year.
|Monthly distribution of when Big Rain Days|
occur in south Florida, 1992 to present
They can happen any time of year (see above).
June happens to be the most plentiful, accounting for one of every five. Interestingly, July is the lowest despite being a core rainy season month (i.e. about 8 inches of rain on average) due to the fact that upper atmospheric instability (still present in June) tends to decrease once the Easterly Trade Winds kick in.