Milledgeville, GA rainwater: 38,302 gallons off a roof
How much rain a roof in Milledgeville, GA collects
38,302gallons a year
That is a 1,500 sq ft asphalt roof under Milledgeville, GA's normal 48.2 inches of rain, about 795 gallons for every inch that falls.
In Milledgeville, 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 Milledgeville station (0.6 mi away). Milledgeville, GA ranks 94th wettest of the 101 cities covered in Georgia.
Month by month in Milledgeville
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.23 | 3,362 | |
| Feb | 4.06 | 3,227 | |
| Mar | 4.75 | 3,775 | |
| Apr | 3.90 | 3,100 | 56 |
| May | 3.16 | 2,512 | 148 |
| Jun | 4.30 | 3,418 | 6 |
| Jul | 4.16 | 3,306 | 24 |
| Aug | 4.73 | 3,759 | |
| Sep | 4.22 | 3,354 | 16 |
| Oct | 2.83 | 2,249 | 190 |
| Nov | 3.36 | 2,671 | |
| Dec | 4.49 | 3,569 |
Mar is the wettest month (4.75 in, 3,775 gal off the roof); Oct the driest (2.83 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 Milledgeville?
Best fit: one 55-gallon barrel, which delivers about 373 gallons to the garden in a normal year (84.8% 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 Milledgeville's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 373 | 36,864 |
| 110 gal | 373 | 36,864 |
| 165 gal | 373 | 36,864 |
| 275 gal | 373 | 36,864 |
| 550 gal | 373 | 36,864 |
| 1,000 gal | 373 | 36,864 |
| 1,500 gal | 373 | 36,864 |
| 2,500 gal | 373 | 36,864 |
| 5,000 gal | 373 | 36,864 |
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