Zephyrhills, FL rainwater: 44,636 gallons off a roof
Rainwater from a roof in Zephyrhills, FL
44,636gallons a year
That is a 1,500 sq ft asphalt roof under Zephyrhills, FL's normal 56.2 inches of rain, about 795 gallons for every inch that falls.
In Zephyrhills, 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 Zephyrhills 0.9 Ene station (0.9 mi away). Zephyrhills, FL ranks 84th wettest of the 173 cities covered in Florida.
Month by month in Zephyrhills
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.89 | 2,297 | |
| Feb | 2.42 | 1,923 | |
| Mar | 2.86 | 2,273 | |
| Apr | 2.70 | 2,146 | 206 |
| May | 3.22 | 2,559 | 141 |
| Jun | 8.81 | 7,002 | |
| Jul | 9.50 | 7,551 | |
| Aug | 9.37 | 7,447 | |
| Sep | 6.91 | 5,492 | |
| Oct | 3.11 | 2,472 | 155 |
| Nov | 1.80 | 1,431 | |
| Dec | 2.57 | 2,043 |
Jul is the wettest month (9.50 in, 7,551 gal off the roof); Nov the driest (1.80 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 Zephyrhills
Best fit: one 55-gallon barrel, which delivers about 426 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 Zephyrhills's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 426 | 43,040 |
| 110 gal | 426 | 43,040 |
| 165 gal | 426 | 43,040 |
| 275 gal | 426 | 43,040 |
| 550 gal | 426 | 43,040 |
| 1,000 gal | 426 | 43,040 |
| 1,500 gal | 426 | 43,040 |
| 2,500 gal | 426 | 43,040 |
| 5,000 gal | 426 | 43,040 |
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