If I had to pull a rabbit out of the hat, in terms of a “dry season” rainfall number, I’d say 14 inches (plus or minus 6).
The El Nino/La Nina climactic teeter totter is in its neutral phase.
El Nino’s famously sweep in wet winters (1983, 1995, 1998) and La Ninas bring in the spector of winter drought (2000, 2006), but neutral years tend to straddle the middle.
Calculating the dry season rain totals for the 6-month period from November through April, over the past 25 years, puts the average — south Florida wide — at right around 14 inches.
That historical trend is shown in the graph below. But there are no absolutes when it comes to the water cycle, especially when you are talking intricate, intereconnected, and downright fickle global teleconnections.