Warner Robins, GA rainwater: 39,661 gallons off a roof
Rainwater from a roof in Warner Robins, GA
39,661gallons a year
That is a 1,500 sq ft asphalt roof under Warner Robins, GA's normal 49.9 inches of rain, about 795 gallons for every inch that falls.
In Warner Robins, 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 Warner Robins 0.3 W station (1.5 mi away). Warner Robins, GA ranks 86th wettest of the 101 cities covered in Georgia.
Month by month in Warner Robins
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.55 | 3,616 | |
| Feb | 4.61 | 3,664 | |
| Mar | 4.65 | 3,696 | |
| Apr | 3.74 | 2,973 | 76 |
| May | 2.95 | 2,345 | 175 |
| Jun | 4.58 | 3,640 | |
| Jul | 5.05 | 4,014 | |
| Aug | 4.56 | 3,624 | |
| Sep | 4.10 | 3,259 | 31 |
| Oct | 3.04 | 2,416 | 163 |
| Nov | 3.66 | 2,909 | |
| Dec | 4.41 | 3,505 |
Jul is the wettest month (5.05 in, 4,014 gal off the roof); May the driest (2.95 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
Barrel or cistern in Warner Robins?
Best fit: one 55-gallon barrel, which delivers about 373 gallons to the garden in a normal year (83.8% 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 Warner Robins's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 373 | 38,193 |
| 110 gal | 373 | 38,193 |
| 165 gal | 373 | 38,193 |
| 275 gal | 373 | 38,193 |
| 550 gal | 373 | 38,193 |
| 1,000 gal | 373 | 38,193 |
| 1,500 gal | 373 | 38,193 |
| 2,500 gal | 373 | 38,193 |
| 5,000 gal | 373 | 38,193 |
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