Oviedo, FL rainwater: 42,832 gallons off a roof
How much rain a roof in Oviedo, FL collects
42,832gallons a year
That is a 1,500 sq ft asphalt roof under Oviedo, FL's normal 53.9 inches of rain, about 795 gallons for every inch that falls.
In Oviedo, 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 Chuluota 0.9 N station (4.1 mi away). Oviedo, FL ranks 116th wettest of the 173 cities covered in Florida.
Month by month in Oviedo
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.59 | 2,059 | |
| Feb | 2.43 | 1,931 | |
| Mar | 3.41 | 2,710 | |
| Apr | 2.51 | 1,995 | 229 |
| May | 3.88 | 3,084 | 59 |
| Jun | 8.31 | 6,605 | |
| Jul | 6.60 | 5,246 | |
| Aug | 7.93 | 6,303 | |
| Sep | 6.91 | 5,492 | |
| Oct | 4.30 | 3,418 | 6 |
| Nov | 2.41 | 1,915 | |
| Dec | 2.61 | 2,074 |
Jun is the wettest month (8.31 in, 6,605 gal off the roof); Nov 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.
Which tank size is worth it in Oviedo
Best fit: one 55-gallon barrel, which delivers about 253 gallons to the garden in a normal year (86.0% 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 Oviedo's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 253 | 41,484 |
| 110 gal | 253 | 41,484 |
| 165 gal | 253 | 41,484 |
| 275 gal | 253 | 41,484 |
| 550 gal | 253 | 41,484 |
| 1,000 gal | 253 | 41,484 |
| 1,500 gal | 253 | 41,484 |
| 2,500 gal | 253 | 41,484 |
| 5,000 gal | 253 | 41,484 |
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