Covington, GA rainwater: 40,138 gallons off a roof
Rainwater from a roof in Covington, GA
40,138gallons a year
That is a 1,500 sq ft asphalt roof under Covington, GA's normal 50.5 inches of rain, about 795 gallons for every inch that falls.
In Covington, 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 Covington station (0.6 mi away). Covington, GA ranks 78th wettest of the 101 cities covered in Georgia.
Month by month in Covington
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.55 | 3,616 | |
| Feb | 5.09 | 4,046 | |
| Mar | 5.10 | 4,054 | |
| Apr | 3.42 | 2,718 | 116 |
| May | 2.93 | 2,329 | 177 |
| Jun | 4.62 | 3,672 | |
| Jul | 4.48 | 3,561 | |
| Aug | 4.17 | 3,314 | 22 |
| Sep | 3.78 | 3,004 | 71 |
| Oct | 3.23 | 2,567 | 140 |
| Nov | 4.22 | 3,354 | |
| Dec | 4.91 | 3,902 |
Mar is the wettest month (5.10 in, 4,054 gal off the roof); May the driest (2.93 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 Covington
Best fit: one 55-gallon barrel, which delivers about 443 gallons to the garden in a normal year (84.2% 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 Covington's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 443 | 38,629 |
| 110 gal | 443 | 38,629 |
| 165 gal | 443 | 38,629 |
| 275 gal | 443 | 38,629 |
| 550 gal | 443 | 38,629 |
| 1,000 gal | 443 | 38,629 |
| 1,500 gal | 443 | 38,629 |
| 2,500 gal | 443 | 38,629 |
| 5,000 gal | 443 | 38,629 |
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