Niceville, FL rainwater: 58,307 gallons off a roof
How much rain a roof in Niceville, FL collects
58,307gallons a year
That is a 1,500 sq ft asphalt roof under Niceville, FL's normal 73.4 inches of rain, about 795 gallons for every inch that falls.
In Niceville, 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 Niceville station (1.0 mi away). Niceville, FL ranks 1st wettest of the 173 cities covered in Florida.
Month by month in Niceville
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 5.86 | 4,658 | |
| Feb | 5.25 | 4,173 | |
| Mar | 5.35 | 4,252 | |
| Apr | 5.99 | 4,761 | |
| May | 3.78 | 3,004 | 71 |
| Jun | 6.79 | 5,397 | |
| Jul | 8.91 | 7,082 | |
| Aug | 9.21 | 7,320 | |
| Sep | 6.97 | 5,540 | |
| Oct | 4.60 | 3,656 | |
| Nov | 4.97 | 3,950 | |
| Dec | 5.68 | 4,514 |
Aug is the wettest month (9.21 in, 7,320 gal off the roof); May the driest (3.78 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
Barrel or cistern in Niceville?
Best fit: one 55-gallon barrel, which delivers about 60 gallons to the garden in a normal year (84.4% 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 Niceville's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 60 | 56,912 |
| 110 gal | 60 | 56,912 |
| 165 gal | 60 | 56,912 |
| 275 gal | 60 | 56,912 |
| 550 gal | 60 | 56,912 |
| 1,000 gal | 60 | 56,912 |
| 1,500 gal | 60 | 56,912 |
| 2,500 gal | 60 | 56,912 |
| 5,000 gal | 60 | 56,912 |
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