Doral, FL rainwater: 53,578 gallons off a roof
How much rain a roof in Doral, FL collects
53,578gallons a year
That is a 1,500 sq ft asphalt roof under Doral, FL's normal 67.4 inches of rain, about 795 gallons for every inch that falls.
In Doral, 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 Miami Intl Ap station (3.1 mi away). Doral, FL ranks 16th wettest of the 173 cities covered in Florida.
Month by month in Doral
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 1.83 | 1,454 | |
| Feb | 2.15 | 1,709 | |
| Mar | 2.46 | 1,955 | |
| Apr | 3.36 | 2,671 | 123 |
| May | 6.32 | 5,023 | |
| Jun | 10.51 | 8,353 | |
| Jul | 7.36 | 5,850 | |
| Aug | 9.58 | 7,614 | |
| Sep | 10.22 | 8,123 | |
| Oct | 7.65 | 6,080 | |
| Nov | 3.53 | 2,806 | |
| Dec | 2.44 | 1,939 |
Jun is the wettest month (10.51 in, 8,353 gal off the roof); Jan the driest (1.83 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 Doral
Best fit: one 55-gallon barrel, which delivers about 107 gallons to the garden in a normal year (86.7% 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 Doral's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 107 | 52,106 |
| 110 gal | 107 | 52,106 |
| 165 gal | 107 | 52,106 |
| 275 gal | 107 | 52,106 |
| 550 gal | 107 | 52,106 |
| 1,000 gal | 107 | 52,106 |
| 1,500 gal | 107 | 52,106 |
| 2,500 gal | 107 | 52,106 |
| 5,000 gal | 107 | 52,106 |
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