Fayetteville, GA rainwater: 41,966 gallons off a roof
Fayetteville, GA: gallons off the roof each year
41,966gallons a year
That is a 1,500 sq ft asphalt roof under Fayetteville, GA's normal 52.8 inches of rain, about 795 gallons for every inch that falls.
In Fayetteville, GA 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 Fayetteville 2.1 Nne station (2.2 mi away). Fayetteville, GA ranks 52nd wettest of the 101 cities covered in Georgia.
Month by month in Fayetteville
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 5.08 | 4,038 | |
| Feb | 5.01 | 3,982 | |
| Mar | 5.18 | 4,117 | |
| Apr | 4.31 | 3,426 | 5 |
| May | 3.55 | 2,822 | 100 |
| Jun | 4.24 | 3,370 | 14 |
| Jul | 4.74 | 3,767 | |
| Aug | 4.50 | 3,577 | |
| Sep | 3.67 | 2,917 | 85 |
| Oct | 3.36 | 2,671 | 123 |
| Nov | 4.17 | 3,314 | |
| Dec | 4.99 | 3,966 |
Mar is the wettest month (5.18 in, 4,117 gal off the roof); Oct the driest (3.36 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 Fayetteville
Best fit: one 55-gallon barrel, which delivers about 273 gallons to the garden in a normal year (83.6% 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 Fayetteville's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 273 | 40,568 |
| 110 gal | 273 | 40,568 |
| 165 gal | 273 | 40,568 |
| 275 gal | 273 | 40,568 |
| 550 gal | 273 | 40,568 |
| 1,000 gal | 273 | 40,568 |
| 1,500 gal | 273 | 40,568 |
| 2,500 gal | 273 | 40,568 |
| 5,000 gal | 273 | 40,568 |
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 Georgia?
Legal. Outdoor irrigation use is unrestricted; indoor non-potable systems must follow Appendix I 'Rainwater Recycling Systems' of the Georgia amendments to the state plumbing code. No state storage cap; potable use depends on local rules.
Checked against the current source on 2026-11-06. Source