Apopka, FL rainwater: 45,940 gallons off a roof
Apopka, FL: gallons off the roof each year
45,940gallons a year
That is a 1,500 sq ft asphalt roof under Apopka, FL's normal 57.8 inches of rain, about 795 gallons for every inch that falls.
In Apopka, 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 Mount Plymouth 0.2 Wsw station (6.7 mi away). Apopka, FL ranks 64th wettest of the 173 cities covered in Florida.
Month by month in Apopka
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.95 | 2,345 | |
| Feb | 2.56 | 2,035 | |
| Mar | 3.26 | 2,591 | |
| Apr | 2.95 | 2,345 | 175 |
| May | 4.65 | 3,696 | |
| Jun | 9.24 | 7,344 | |
| Jul | 7.56 | 6,009 | |
| Aug | 9.92 | 7,884 | |
| Sep | 6.35 | 5,047 | |
| Oct | 3.76 | 2,988 | 74 |
| Nov | 2.08 | 1,653 | |
| Dec | 2.52 | 2,003 |
Aug is the wettest month (9.92 in, 7,884 gal off the roof); Nov the driest (2.08 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 Apopka
Best fit: one 55-gallon barrel, which delivers about 207 gallons to the garden in a normal year (83.4% 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 Apopka's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 207 | 44,458 |
| 110 gal | 207 | 44,458 |
| 165 gal | 207 | 44,458 |
| 275 gal | 207 | 44,458 |
| 550 gal | 207 | 44,458 |
| 1,000 gal | 207 | 44,458 |
| 1,500 gal | 207 | 44,458 |
| 2,500 gal | 207 | 44,458 |
| 5,000 gal | 207 | 44,458 |
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