Milton, FL rainwater: 52,767 gallons off a roof
How much rain a roof in Milton, FL collects
52,767gallons a year
That is a 1,500 sq ft asphalt roof under Milton, FL's normal 66.4 inches of rain, about 795 gallons for every inch that falls.
In Milton, 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 Whiting Field Nas South station (5.4 mi away). Milton, FL ranks 20th wettest of the 173 cities covered in Florida.
Month by month in Milton
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 5.46 | 4,340 | |
| Feb | 4.85 | 3,855 | |
| Mar | 5.39 | 4,284 | |
| Apr | 5.93 | 4,713 | |
| May | 3.80 | 3,020 | 69 |
| Jun | 6.76 | 5,373 | |
| Jul | 7.61 | 6,048 | |
| Aug | 6.39 | 5,079 | |
| Sep | 6.53 | 5,190 | |
| Oct | 3.87 | 3,076 | 60 |
| Nov | 4.36 | 3,465 | |
| Dec | 5.44 | 4,324 |
Jul is the wettest month (7.61 in, 6,048 gal off the roof); May the driest (3.80 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 Milton
Best fit: one 55-gallon barrel, which delivers about 112 gallons to the garden in a normal year (87.2% of its need).
If you buy one, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Milton's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 112 | 51,591 |
| 110 gal | 112 | 51,591 |
| 165 gal | 112 | 51,591 |
| 275 gal | 112 | 51,591 |
| 550 gal | 112 | 51,591 |
| 1,000 gal | 112 | 51,591 |
| 1,500 gal | 112 | 51,591 |
| 2,500 gal | 112 | 51,591 |
| 5,000 gal | 112 | 51,591 |
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