Braselton, GA rainwater: 42,260 gallons off a roof
How much rain a roof in Braselton, GA collects
42,260gallons a year
That is a 1,500 sq ft asphalt roof under Braselton, GA's normal 53.2 inches of rain, about 795 gallons for every inch that falls.
In Braselton, 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 Braselton 3.0 Ne station (3.9 mi away). Braselton, GA ranks 48th wettest of the 101 cities covered in Georgia.
Month by month in Braselton
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.82 | 3,831 | |
| Feb | 4.77 | 3,791 | |
| Mar | 4.87 | 3,871 | |
| Apr | 3.97 | 3,155 | 47 |
| May | 3.71 | 2,949 | 80 |
| Jun | 4.85 | 3,855 | |
| Jul | 4.10 | 3,259 | 31 |
| Aug | 4.92 | 3,910 | |
| Sep | 3.99 | 3,171 | 45 |
| Oct | 3.86 | 3,068 | 61 |
| Nov | 4.19 | 3,330 | |
| Dec | 5.12 | 4,069 |
Dec is the wettest month (5.12 in, 4,069 gal off the roof); May the driest (3.71 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 Braselton
Best fit: one 55-gallon barrel, which delivers about 211 gallons to the garden in a normal year (79.8% 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 Braselton's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 211 | 40,834 |
| 110 gal | 211 | 40,834 |
| 165 gal | 211 | 40,834 |
| 275 gal | 211 | 40,834 |
| 550 gal | 211 | 40,834 |
| 1,000 gal | 211 | 40,834 |
| 1,500 gal | 211 | 40,834 |
| 2,500 gal | 211 | 40,834 |
| 5,000 gal | 211 | 40,834 |
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