Augusta-Richmond County, GA rainwater: 35,043 gallons off a roof
How much rain a roof in Augusta-Richmond County, GA collects
35,043gallons a year
That is a 1,500 sq ft asphalt roof under Augusta-Richmond County, GA's normal 44.1 inches of rain, about 795 gallons for every inch that falls.
In Augusta-Richmond County, 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 Augusta Bush Fld Ap station (6.4 mi away). Augusta-Richmond County, GA ranks 101st wettest of the 101 cities covered in Georgia.
Month by month in Augusta-Richmond County
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.84 | 3,052 | |
| Feb | 3.67 | 2,917 | |
| Mar | 4.08 | 3,243 | |
| Apr | 2.92 | 2,321 | 178 |
| May | 3.05 | 2,424 | 162 |
| Jun | 4.75 | 3,775 | |
| Jul | 4.48 | 3,561 | |
| Aug | 4.61 | 3,664 | |
| Sep | 3.60 | 2,861 | 94 |
| Oct | 2.56 | 2,035 | 223 |
| Nov | 2.66 | 2,114 | |
| Dec | 3.87 | 3,076 |
Jun is the wettest month (4.75 in, 3,775 gal off the roof); Oct the driest (2.56 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 Augusta-Richmond County?
Best fit: one 55-gallon barrel, which delivers about 557 gallons to the garden in a normal year (84.8% 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 Augusta-Richmond County's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 557 | 33,451 |
| 110 gal | 557 | 33,451 |
| 165 gal | 557 | 33,451 |
| 275 gal | 557 | 33,451 |
| 550 gal | 557 | 33,451 |
| 1,000 gal | 557 | 33,451 |
| 1,500 gal | 557 | 33,451 |
| 2,500 gal | 557 | 33,451 |
| 5,000 gal | 557 | 33,451 |
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