Tifton, GA rainwater: 38,333 gallons off a roof
How much rain a roof in Tifton, GA collects
38,333gallons a year
That is a 1,500 sq ft asphalt roof under Tifton, GA's normal 48.2 inches of rain, about 795 gallons for every inch that falls.
In Tifton, 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 Tifton station (2.8 mi away). Tifton, GA ranks 93rd wettest of the 101 cities covered in Georgia.
Month by month in Tifton
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.08 | 3,243 | |
| Feb | 4.40 | 3,497 | |
| Mar | 4.77 | 3,791 | |
| Apr | 3.28 | 2,607 | 133 |
| May | 2.67 | 2,122 | 209 |
| Jun | 4.95 | 3,934 | |
| Jul | 5.16 | 4,101 | |
| Aug | 4.45 | 3,537 | |
| Sep | 4.28 | 3,402 | 9 |
| Oct | 2.83 | 2,249 | 190 |
| Nov | 3.16 | 2,512 | |
| Dec | 4.20 | 3,338 |
Jul is the wettest month (5.16 in, 4,101 gal off the roof); May the driest (2.67 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 Tifton
Best fit: one 55-gallon barrel, which delivers about 464 gallons to the garden in a normal year (85.8% of its need).
If you set one up, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Tifton's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 464 | 36,805 |
| 110 gal | 464 | 36,805 |
| 165 gal | 464 | 36,805 |
| 275 gal | 464 | 36,805 |
| 550 gal | 464 | 36,805 |
| 1,000 gal | 464 | 36,805 |
| 1,500 gal | 464 | 36,805 |
| 2,500 gal | 464 | 36,805 |
| 5,000 gal | 464 | 36,805 |
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