Doraville, GA rainwater: 43,277 gallons off a roof
How much rain a roof in Doraville, GA collects
43,277gallons a year
That is a 1,500 sq ft asphalt roof under Doraville, GA's normal 54.5 inches of rain, about 795 gallons for every inch that falls.
In Doraville, 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 Doraville 2 Nne station (2.0 mi away). Doraville, GA ranks 23rd wettest of the 101 cities covered in Georgia.
Month by month in Doraville
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.85 | 3,855 | |
| Feb | 4.75 | 3,775 | |
| Mar | 4.83 | 3,839 | |
| Apr | 4.13 | 3,283 | 27 |
| May | 4.65 | 3,696 | |
| Jun | 5.13 | 4,077 | |
| Jul | 4.59 | 3,648 | |
| Aug | 4.60 | 3,656 | |
| Sep | 4.21 | 3,346 | 17 |
| Oct | 3.63 | 2,885 | 90 |
| Nov | 4.35 | 3,457 | |
| Dec | 4.73 | 3,759 |
Jun is the wettest month (5.13 in, 4,077 gal off the roof); Oct the driest (3.63 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 Doraville?
Best fit: one 55-gallon barrel, which delivers about 114 gallons to the garden in a normal year (84.7% 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 Doraville's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 114 | 41,993 |
| 110 gal | 114 | 41,993 |
| 165 gal | 114 | 41,993 |
| 275 gal | 114 | 41,993 |
| 550 gal | 114 | 41,993 |
| 1,000 gal | 114 | 41,993 |
| 1,500 gal | 114 | 41,993 |
| 2,500 gal | 114 | 41,993 |
| 5,000 gal | 114 | 41,993 |
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