Eustis, FL rainwater: 39,764 gallons off a roof
Eustis, FL: gallons off the roof each year
39,764gallons a year
That is a 1,500 sq ft asphalt roof under Eustis, FL's normal 50.0 inches of rain, about 795 gallons for every inch that falls.
In Eustis, 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 Lisbon station (6.6 mi away). Eustis, FL ranks 163rd wettest of the 173 cities covered in Florida.
Month by month in Eustis
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.81 | 2,233 | |
| Feb | 2.49 | 1,979 | |
| Mar | 3.49 | 2,774 | |
| Apr | 2.64 | 2,098 | 213 |
| May | 3.37 | 2,678 | 122 |
| Jun | 7.51 | 5,969 | |
| Jul | 6.50 | 5,166 | |
| Aug | 7.46 | 5,929 | |
| Sep | 6.32 | 5,023 | |
| Oct | 2.94 | 2,337 | 176 |
| Nov | 2.24 | 1,780 | |
| Dec | 2.26 | 1,796 |
Jun is the wettest month (7.51 in, 5,969 gal off the roof); Nov the driest (2.24 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 Eustis
Best fit: one 55-gallon barrel, which delivers about 435 gallons to the garden in a normal year (85.1% 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 Eustis's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 435 | 38,159 |
| 110 gal | 435 | 38,159 |
| 165 gal | 435 | 38,159 |
| 275 gal | 435 | 38,159 |
| 550 gal | 435 | 38,159 |
| 1,000 gal | 435 | 38,159 |
| 1,500 gal | 435 | 38,159 |
| 2,500 gal | 435 | 38,159 |
| 5,000 gal | 435 | 38,159 |
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