Miami Shores, FL rainwater: 52,362 gallons off a roof
Miami Shores, FL: gallons off the roof each year
52,362gallons a year
That is a 1,500 sq ft asphalt roof under Miami Shores, FL's normal 65.9 inches of rain, about 795 gallons for every inch that falls.
In Miami Shores, 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 Biscayne Park 0.3 E station (1.0 mi away). Miami Shores, FL ranks 29th wettest of the 173 cities covered in Florida.
Month by month in Miami Shores
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.19 | 1,741 | |
| Feb | 2.79 | 2,218 | |
| Mar | 3.11 | 2,472 | |
| Apr | 3.51 | 2,790 | 105 |
| May | 6.18 | 4,912 | |
| Jun | 9.13 | 7,257 | |
| Jul | 7.28 | 5,786 | |
| Aug | 8.46 | 6,724 | |
| Sep | 8.80 | 6,994 | |
| Oct | 7.51 | 5,969 | |
| Nov | 4.43 | 3,521 | |
| Dec | 2.49 | 1,979 |
Jun is the wettest month (9.13 in, 7,257 gal off the roof); Jan the driest (2.19 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 Miami Shores
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 set one up, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Miami Shores's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 87 | 51,044 |
| 110 gal | 87 | 51,044 |
| 165 gal | 87 | 51,044 |
| 275 gal | 87 | 51,044 |
| 550 gal | 87 | 51,044 |
| 1,000 gal | 87 | 51,044 |
| 1,500 gal | 87 | 51,044 |
| 2,500 gal | 87 | 51,044 |
| 5,000 gal | 87 | 51,044 |
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