Thomasville, GA rainwater: 42,522 gallons off a roof
Rainwater from a roof in Thomasville, GA
42,522gallons a year
That is a 1,500 sq ft asphalt roof under Thomasville, GA's normal 53.5 inches of rain, about 795 gallons for every inch that falls.
In Thomasville, 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 Thomasville 5.1 Ese station (5.1 mi away). Thomasville, GA ranks 40th wettest of the 101 cities covered in Georgia.
Month by month in Thomasville
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.58 | 3,640 | |
| Feb | 4.42 | 3,513 | |
| Mar | 5.41 | 4,300 | |
| Apr | 3.37 | 2,678 | 122 |
| May | 2.73 | 2,170 | 202 |
| Jun | 4.94 | 3,926 | |
| Jul | 6.53 | 5,190 | |
| Aug | 5.10 | 4,054 | |
| Sep | 5.62 | 4,467 | |
| Oct | 2.82 | 2,241 | 191 |
| Nov | 3.35 | 2,663 | |
| Dec | 4.63 | 3,680 |
Jul is the wettest month (6.53 in, 5,190 gal off the roof); May the driest (2.73 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 Thomasville
Best fit: one 55-gallon barrel, which delivers about 431 gallons to the garden in a normal year (83.7% 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 Thomasville's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 431 | 40,891 |
| 110 gal | 431 | 40,891 |
| 165 gal | 431 | 40,891 |
| 275 gal | 431 | 40,891 |
| 550 gal | 431 | 40,891 |
| 1,000 gal | 431 | 40,891 |
| 1,500 gal | 431 | 40,891 |
| 2,500 gal | 431 | 40,891 |
| 5,000 gal | 431 | 40,891 |
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