Cocoa, FL rainwater: 43,929 gallons off a roof
Cocoa, FL: gallons off the roof each year
43,929gallons a year
That is a 1,500 sq ft asphalt roof under Cocoa, FL's normal 55.3 inches of rain, about 795 gallons for every inch that falls.
In Cocoa, FL a single barrel does most of the work. Storms come often enough that a small tank refills before it runs dry, and a bigger one would mostly sit full.
Rainfall: NOAA 1991-2020 climate normals, the Cocoa 2.6 Wnw station (1.9 mi away). Cocoa, FL ranks 97th wettest of the 173 cities covered in Florida.
Month by month in Cocoa
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.47 | 1,963 | |
| Feb | 2.37 | 1,884 | |
| Mar | 3.17 | 2,520 | |
| Apr | 2.76 | 2,194 | 198 |
| May | 3.22 | 2,559 | 141 |
| Jun | 8.12 | 6,454 | |
| Jul | 7.22 | 5,738 | |
| Aug | 7.61 | 6,048 | |
| Sep | 8.26 | 6,565 | |
| Oct | 5.09 | 4,046 | |
| Nov | 2.51 | 1,995 | |
| Dec | 2.47 | 1,963 |
Sep is the wettest month (8.26 in, 6,565 gal off the roof); Feb the driest (2.37 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
Which tank size is worth it in Cocoa
Best fit: one 55-gallon barrel, which delivers about 285 gallons to the garden in a normal year (84.0% of its need).
Before you buy, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Cocoa's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 285 | 42,473 |
| 110 gal | 285 | 42,473 |
| 165 gal | 285 | 42,473 |
| 275 gal | 285 | 42,473 |
| 550 gal | 285 | 42,473 |
| 1,000 gal | 285 | 42,473 |
| 1,500 gal | 285 | 42,473 |
| 2,500 gal | 285 | 42,473 |
| 5,000 gal | 285 | 42,473 |
Simulated storm by storm through a normal year using the station's count of days with 0.1 in or more of rain each month.
Is rainwater collection legal in Florida?
Legal. Florida approves onsite non-potable use of rainwater for landscape irrigation, vehicle washing, filling pools and fountains and, in some local jurisdictions, toilet/urinal flushing (Florida Plumbing Code). No state storage cap or registration for non-potable collection.
Checked against the current source on 2026-11-06. Source