Palmetto, FL rainwater: 44,732 gallons off a roof
How much rain a roof in Palmetto, FL collects
44,732gallons a year
That is a 1,500 sq ft asphalt roof under Palmetto, FL's normal 56.3 inches of rain, about 795 gallons for every inch that falls.
In Palmetto, 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 Bradenton 5 Ese station (7.0 mi away). Palmetto, FL ranks 82nd wettest of the 173 cities covered in Florida.
Month by month in Palmetto
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.76 | 2,194 | |
| Feb | 1.99 | 1,582 | |
| Mar | 3.11 | 2,472 | |
| Apr | 2.53 | 2,011 | 227 |
| May | 3.49 | 2,774 | 107 |
| Jun | 9.03 | 7,177 | |
| Jul | 8.91 | 7,082 | |
| Aug | 10.07 | 8,004 | |
| Sep | 7.43 | 5,905 | |
| Oct | 2.88 | 2,289 | 183 |
| Nov | 1.82 | 1,447 | |
| Dec | 2.26 | 1,796 |
Aug is the wettest month (10.07 in, 8,004 gal off the roof); Nov the driest (1.82 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
Barrel or cistern in Palmetto?
Best fit: one 55-gallon barrel, which delivers about 428 gallons to the garden in a normal year (82.7% 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 Palmetto's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 428 | 43,209 |
| 110 gal | 454 | 43,183 |
| 165 gal | 454 | 43,183 |
| 275 gal | 454 | 43,183 |
| 550 gal | 454 | 43,183 |
| 1,000 gal | 454 | 43,183 |
| 1,500 gal | 454 | 43,183 |
| 2,500 gal | 454 | 43,183 |
| 5,000 gal | 454 | 43,183 |
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