Grove City, OH rainwater: 32,937 gallons off a roof
Rainwater from a roof in Grove City, OH
32,937gallons a year
That is a 1,500 sq ft asphalt roof under Grove City, OH's normal 41.4 inches of rain, about 795 gallons for every inch that falls.
In Grove City, OH 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 Columbus-Parsons Ave station (4.4 mi away). Grove City, OH ranks 113th wettest of the 176 cities covered in Ohio.
Month by month in Grove City
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.90 | 2,305 | |
| Feb | 2.44 | 1,939 | |
| Mar | 3.53 | 2,806 | |
| Apr | 4.02 | 3,195 | 41 |
| May | 4.07 | 3,235 | 35 |
| Jun | 4.65 | 3,696 | |
| Jul | 4.52 | 3,593 | |
| Aug | 3.28 | 2,607 | 133 |
| Sep | 3.06 | 2,432 | 161 |
| Oct | 2.88 | 2,289 | 183 |
| Nov | 2.93 | 2,329 | |
| Dec | 3.16 | 2,512 |
Jun is the wettest month (4.65 in, 3,696 gal off the roof); Feb the driest (2.44 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 Grove City?
Best fit: one 55-gallon barrel, which delivers about 432 gallons to the garden in a normal year (78.0% 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 Grove City's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 432 | 31,230 |
| 110 gal | 432 | 31,230 |
| 165 gal | 432 | 31,230 |
| 275 gal | 432 | 31,230 |
| 550 gal | 432 | 31,230 |
| 1,000 gal | 432 | 31,230 |
| 1,500 gal | 432 | 31,230 |
| 2,500 gal | 432 | 31,230 |
| 5,000 gal | 432 | 31,230 |
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 Ohio?
Legal. Ohio regulates rainwater cisterns used as a drinking-water source as private water systems (OAC chapter 3701-28): local health department permit, continuous disinfection and filtration. No state rule restricting non-potable collection or storage size.
Checked against the current source on 2026-11-06. Source