Clermont, FL rainwater: 40,249 gallons off a roof
How much rain a roof in Clermont, FL collects
40,249gallons a year
That is a 1,500 sq ft asphalt roof under Clermont, FL's normal 50.6 inches of rain, about 795 gallons for every inch that falls.
In Clermont, 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 Clermont 9 S station (4.7 mi away). Clermont, FL ranks 157th wettest of the 173 cities covered in Florida.
Month by month in Clermont
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.84 | 2,257 | |
| Feb | 2.29 | 1,820 | |
| Mar | 3.20 | 2,543 | |
| Apr | 2.59 | 2,059 | 219 |
| May | 3.54 | 2,814 | 101 |
| Jun | 7.95 | 6,319 | |
| Jul | 7.44 | 5,913 | |
| Aug | 8.09 | 6,430 | |
| Sep | 5.39 | 4,284 | |
| Oct | 2.71 | 2,154 | 204 |
| Nov | 1.81 | 1,439 | |
| Dec | 2.79 | 2,218 |
Aug is the wettest month (8.09 in, 6,430 gal off the roof); Nov the driest (1.81 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 Clermont
Best fit: one 55-gallon barrel, which delivers about 446 gallons to the garden in a normal year (85.0% 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 Clermont's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 446 | 38,678 |
| 110 gal | 446 | 38,678 |
| 165 gal | 446 | 38,678 |
| 275 gal | 446 | 38,678 |
| 550 gal | 446 | 38,678 |
| 1,000 gal | 446 | 38,678 |
| 1,500 gal | 446 | 38,678 |
| 2,500 gal | 446 | 38,678 |
| 5,000 gal | 446 | 38,678 |
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