Fort Pierce, FL rainwater: 44,422 gallons off a roof
Fort Pierce, FL: gallons off the roof each year
44,422gallons a year
That is a 1,500 sq ft asphalt roof under Fort Pierce, FL's normal 55.9 inches of rain, about 795 gallons for every inch that falls.
In Fort Pierce, 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 Ft Pierce station (1.2 mi away). Fort Pierce, FL ranks 90th wettest of the 173 cities covered in Florida.
Month by month in Fort Pierce
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.04 | 2,416 | |
| Feb | 2.80 | 2,225 | |
| Mar | 3.03 | 2,408 | |
| Apr | 3.62 | 2,877 | 91 |
| May | 4.20 | 3,338 | 19 |
| Jun | 6.22 | 4,944 | |
| Jul | 6.19 | 4,920 | |
| Aug | 7.25 | 5,762 | |
| Sep | 8.21 | 6,525 | |
| Oct | 5.72 | 4,546 | |
| Nov | 3.20 | 2,543 | |
| Dec | 2.41 | 1,915 |
Sep is the wettest month (8.21 in, 6,525 gal off the roof); Dec the driest (2.41 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 Fort Pierce
Best fit: one 55-gallon barrel, which delivers about 91 gallons to the garden in a normal year (82.9% 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 Fort Pierce's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 91 | 43,116 |
| 110 gal | 91 | 43,116 |
| 165 gal | 91 | 43,116 |
| 275 gal | 91 | 43,116 |
| 550 gal | 91 | 43,116 |
| 1,000 gal | 91 | 43,116 |
| 1,500 gal | 91 | 43,116 |
| 2,500 gal | 91 | 43,116 |
| 5,000 gal | 91 | 43,116 |
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