LaGrange, GA rainwater: 43,722 gallons off a roof
How much rain a roof in LaGrange, GA collects
43,722gallons a year
That is a 1,500 sq ft asphalt roof under LaGrange, GA's normal 55.0 inches of rain, about 795 gallons for every inch that falls.
In LaGrange, 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 La Grange 1.2 Nne station (2.2 mi away). LaGrange, GA ranks 16th wettest of the 101 cities covered in Georgia.
Month by month in LaGrange
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 5.13 | 4,077 | |
| Feb | 5.24 | 4,165 | |
| Mar | 5.51 | 4,379 | |
| Apr | 4.32 | 3,434 | 4 |
| May | 3.95 | 3,139 | 50 |
| Jun | 5.09 | 4,046 | |
| Jul | 4.65 | 3,696 | |
| Aug | 4.15 | 3,298 | 25 |
| Sep | 4.30 | 3,418 | 6 |
| Oct | 2.86 | 2,273 | 186 |
| Nov | 4.33 | 3,442 | |
| Dec | 5.48 | 4,356 |
Mar is the wettest month (5.51 in, 4,379 gal off the roof); Oct the driest (2.86 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 LaGrange
Best fit: one 55-gallon barrel, which delivers about 230 gallons to the garden in a normal year (85.0% 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 LaGrange's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 230 | 42,412 |
| 110 gal | 230 | 42,412 |
| 165 gal | 230 | 42,412 |
| 275 gal | 230 | 42,412 |
| 550 gal | 230 | 42,412 |
| 1,000 gal | 230 | 42,412 |
| 1,500 gal | 230 | 42,412 |
| 2,500 gal | 230 | 42,412 |
| 5,000 gal | 230 | 42,412 |
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