Groveland, FL rainwater: 40,225 gallons off a roof
Groveland, FL: gallons off the roof each year
40,225gallons a year
That is a 1,500 sq ft asphalt roof under Groveland, FL's normal 50.6 inches of rain, about 795 gallons for every inch that falls.
In Groveland, 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 Groveland 1.7 E station (5.8 mi away). Groveland, FL ranks 159th wettest of the 173 cities covered in Florida.
Month by month in Groveland
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.95 | 2,345 | |
| Feb | 2.35 | 1,868 | |
| Mar | 3.16 | 2,512 | |
| Apr | 2.52 | 2,003 | 228 |
| May | 3.11 | 2,472 | 155 |
| Jun | 8.56 | 6,804 | |
| Jul | 7.08 | 5,627 | |
| Aug | 7.36 | 5,850 | |
| Sep | 5.07 | 4,030 | |
| Oct | 3.57 | 2,837 | 97 |
| Nov | 2.47 | 1,963 | |
| Dec | 2.41 | 1,915 |
Jun is the wettest month (8.56 in, 6,804 gal off the roof); Feb the driest (2.35 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 Groveland
Best fit: one 55-gallon barrel, which delivers about 402 gallons to the garden in a normal year (83.8% 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 Groveland's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 402 | 38,623 |
| 110 gal | 402 | 38,623 |
| 165 gal | 402 | 38,623 |
| 275 gal | 402 | 38,623 |
| 550 gal | 402 | 38,623 |
| 1,000 gal | 402 | 38,623 |
| 1,500 gal | 402 | 38,623 |
| 2,500 gal | 402 | 38,623 |
| 5,000 gal | 402 | 38,623 |
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