Jefferson, GA rainwater: 41,831 gallons off a roof
How much rain a roof in Jefferson, GA collects
41,831gallons a year
That is a 1,500 sq ft asphalt roof under Jefferson, GA's normal 52.6 inches of rain, about 795 gallons for every inch that falls.
In Jefferson, 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 Winder 3.9 Nne station (8.3 mi away). Jefferson, GA ranks 54th wettest of the 101 cities covered in Georgia.
Month by month in Jefferson
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.47 | 3,553 | |
| Feb | 4.59 | 3,648 | |
| Mar | 4.95 | 3,934 | |
| Apr | 3.98 | 3,163 | 46 |
| May | 3.67 | 2,917 | 85 |
| Jun | 5.62 | 4,467 | |
| Jul | 3.62 | 2,877 | 91 |
| Aug | 4.91 | 3,902 | |
| Sep | 4.36 | 3,465 | |
| Oct | 3.73 | 2,965 | 77 |
| Nov | 4.00 | 3,179 | |
| Dec | 4.73 | 3,759 |
Jun is the wettest month (5.62 in, 4,467 gal off the roof); Jul the driest (3.62 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 Jefferson
Best fit: one 55-gallon barrel, which delivers about 244 gallons to the garden in a normal year (81.5% 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 Jefferson's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 244 | 40,432 |
| 110 gal | 244 | 40,432 |
| 165 gal | 244 | 40,432 |
| 275 gal | 244 | 40,432 |
| 550 gal | 244 | 40,432 |
| 1,000 gal | 244 | 40,432 |
| 1,500 gal | 244 | 40,432 |
| 2,500 gal | 244 | 40,432 |
| 5,000 gal | 244 | 40,432 |
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