Jesup, GA rainwater: 40,694 gallons off a roof
How much rain a roof in Jesup, GA collects
40,694gallons a year
That is a 1,500 sq ft asphalt roof under Jesup, GA's normal 51.2 inches of rain, about 795 gallons for every inch that falls.
In Jesup, 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 Screven 2.3 Ene station (8.3 mi away). Jesup, GA ranks 68th wettest of the 101 cities covered in Georgia.
Month by month in Jesup
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.54 | 2,814 | |
| Feb | 3.13 | 2,488 | |
| Mar | 3.69 | 2,933 | |
| Apr | 3.17 | 2,520 | 147 |
| May | 3.44 | 2,734 | 113 |
| Jun | 6.76 | 5,373 | |
| Jul | 5.73 | 4,554 | |
| Aug | 6.64 | 5,278 | |
| Sep | 4.53 | 3,600 | |
| Oct | 4.50 | 3,577 | |
| Nov | 2.69 | 2,138 | |
| Dec | 3.38 | 2,686 |
Jun is the wettest month (6.76 in, 5,373 gal off the roof); Nov the driest (2.69 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 Jesup
Best fit: one 55-gallon barrel, which delivers about 218 gallons to the garden in a normal year (83.7% 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 Jesup's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 218 | 39,396 |
| 110 gal | 218 | 39,396 |
| 165 gal | 218 | 39,396 |
| 275 gal | 218 | 39,396 |
| 550 gal | 218 | 39,396 |
| 1,000 gal | 218 | 39,396 |
| 1,500 gal | 218 | 39,396 |
| 2,500 gal | 218 | 39,396 |
| 5,000 gal | 218 | 39,396 |
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