Peachtree Corners, GA rainwater: 44,763 gallons off a roof
Peachtree Corners, GA: gallons off the roof each year
44,763gallons a year
That is a 1,500 sq ft asphalt roof under Peachtree Corners, GA's normal 56.3 inches of rain, about 795 gallons for every inch that falls.
In Peachtree Corners, 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 Norcross station (1.4 mi away). Peachtree Corners, GA ranks 8th wettest of the 101 cities covered in Georgia.
Month by month in Peachtree Corners
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 5.14 | 4,085 | |
| Feb | 5.15 | 4,093 | |
| Mar | 5.12 | 4,069 | |
| Apr | 3.76 | 2,988 | 74 |
| May | 4.41 | 3,505 | |
| Jun | 4.98 | 3,958 | |
| Jul | 5.20 | 4,133 | |
| Aug | 4.91 | 3,902 | |
| Sep | 4.36 | 3,465 | |
| Oct | 3.43 | 2,726 | 115 |
| Nov | 5.25 | 4,173 | |
| Dec | 4.61 | 3,664 |
Nov is the wettest month (5.25 in, 4,173 gal off the roof); Oct the driest (3.43 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
What size rain barrel for Peachtree Corners
Best fit: one 55-gallon barrel, which delivers about 159 gallons to the garden in a normal year (84.5% 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 Peachtree Corners's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 159 | 43,375 |
| 110 gal | 159 | 43,375 |
| 165 gal | 159 | 43,375 |
| 275 gal | 159 | 43,375 |
| 550 gal | 159 | 43,375 |
| 1,000 gal | 159 | 43,375 |
| 1,500 gal | 159 | 43,375 |
| 2,500 gal | 159 | 43,375 |
| 5,000 gal | 159 | 43,375 |
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