Riviera Beach, FL rainwater: 49,008 gallons off a roof
Riviera Beach, FL: gallons off the roof each year
49,008gallons a year
That is a 1,500 sq ft asphalt roof under Riviera Beach, FL's normal 61.7 inches of rain, about 795 gallons for every inch that falls.
In Riviera Beach, 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 Palm Beach Shores 1.4 N station (2.8 mi away). Riviera Beach, FL ranks 57th wettest of the 173 cities covered in Florida.
Month by month in Riviera Beach
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.32 | 2,639 | |
| Feb | 4.28 | 3,402 | |
| Mar | 3.65 | 2,901 | |
| Apr | 3.53 | 2,806 | 102 |
| May | 5.03 | 3,998 | |
| Jun | 8.26 | 6,565 | |
| Jul | 4.33 | 3,442 | 2 |
| Aug | 8.95 | 7,114 | |
| Sep | 7.69 | 6,112 | |
| Oct | 6.15 | 4,888 | |
| Nov | 3.51 | 2,790 | |
| Dec | 2.96 | 2,353 |
Aug is the wettest month (8.95 in, 7,114 gal off the roof); Dec the driest (2.96 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
What size rain barrel for Riviera Beach
Best fit: one 55-gallon barrel, which delivers about 87 gallons to the garden in a normal year (83.1% of its need).
If you buy one, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Riviera Beach's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 87 | 47,496 |
| 110 gal | 87 | 47,496 |
| 165 gal | 87 | 47,496 |
| 275 gal | 87 | 47,496 |
| 550 gal | 87 | 47,496 |
| 1,000 gal | 87 | 47,496 |
| 1,500 gal | 87 | 47,496 |
| 2,500 gal | 87 | 47,496 |
| 5,000 gal | 87 | 47,496 |
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