Vidalia, GA rainwater: 37,769 gallons off a roof
Rainwater from a roof in Vidalia, GA
37,769gallons a year
That is a 1,500 sq ft asphalt roof under Vidalia, GA's normal 47.5 inches of rain, about 795 gallons for every inch that falls.
In Vidalia, 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 Stillmore station (19.1 mi away). Vidalia, GA ranks 97th wettest of the 101 cities covered in Georgia.
Month by month in Vidalia
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.20 | 3,338 | |
| Feb | 3.54 | 2,814 | |
| Mar | 4.09 | 3,251 | |
| Apr | 2.87 | 2,281 | 185 |
| May | 3.54 | 2,814 | 101 |
| Jun | 4.84 | 3,847 | |
| Jul | 5.78 | 4,594 | |
| Aug | 6.35 | 5,047 | |
| Sep | 3.52 | 2,798 | 103 |
| Oct | 2.45 | 1,947 | 237 |
| Nov | 2.93 | 2,329 | |
| Dec | 3.41 | 2,710 |
Aug is the wettest month (6.35 in, 5,047 gal off the roof); Oct the driest (2.45 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 Vidalia
Best fit: one 55-gallon barrel, which delivers about 528 gallons to the garden in a normal year (84.4% 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 Vidalia's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 528 | 36,117 |
| 110 gal | 528 | 36,117 |
| 165 gal | 528 | 36,117 |
| 275 gal | 528 | 36,117 |
| 550 gal | 528 | 36,117 |
| 1,000 gal | 528 | 36,117 |
| 1,500 gal | 528 | 36,117 |
| 2,500 gal | 528 | 36,117 |
| 5,000 gal | 528 | 36,117 |
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