Stuart, FL rainwater: 49,850 gallons off a roof
How much rain a roof in Stuart, FL collects
49,850gallons a year
That is a 1,500 sq ft asphalt roof under Stuart, FL's normal 62.7 inches of rain, about 795 gallons for every inch that falls.
In Stuart, 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 Stuart station (0.5 mi away). Stuart, FL ranks 50th wettest of the 173 cities covered in Florida.
Month by month in Stuart
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.01 | 2,392 | |
| Feb | 2.61 | 2,074 | |
| Mar | 3.76 | 2,988 | |
| Apr | 3.56 | 2,830 | 98 |
| May | 5.66 | 4,499 | |
| Jun | 7.44 | 5,913 | |
| Jul | 6.08 | 4,832 | |
| Aug | 8.49 | 6,748 | |
| Sep | 8.28 | 6,581 | |
| Oct | 6.46 | 5,134 | |
| Nov | 4.16 | 3,306 | |
| Dec | 3.21 | 2,551 |
Aug is the wettest month (8.49 in, 6,748 gal off the roof); Feb the driest (2.61 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 Stuart
Best fit: one 55-gallon barrel, which delivers about 79 gallons to the garden in a normal year (80.2% 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 Stuart's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 79 | 48,391 |
| 110 gal | 79 | 48,391 |
| 165 gal | 79 | 48,391 |
| 275 gal | 79 | 48,391 |
| 550 gal | 79 | 48,391 |
| 1,000 gal | 79 | 48,391 |
| 1,500 gal | 79 | 48,391 |
| 2,500 gal | 79 | 48,391 |
| 5,000 gal | 79 | 48,391 |
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