Ashtabula, OH rainwater: 29,463 gallons off a roof
How much rain a roof in Ashtabula, OH collects
29,463gallons a year
That is a 1,500 sq ft asphalt roof under Ashtabula, OH's normal 37.1 inches of rain, about 795 gallons for every inch that falls.
In Ashtabula, 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 Ashtabula Co Ap station (8.8 mi away). Ashtabula, OH ranks 157th wettest of the 176 cities covered in Ohio.
Month by month in Ashtabula
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 1.90 | 1,510 | |
| Feb | 1.68 | 1,335 | |
| Mar | 2.36 | 1,876 | |
| Apr | 3.36 | 2,671 | 123 |
| May | 3.30 | 2,623 | 131 |
| Jun | 3.68 | 2,925 | 84 |
| Jul | 4.27 | 3,394 | 10 |
| Aug | 3.57 | 2,837 | 97 |
| Sep | 3.85 | 3,060 | 62 |
| Oct | 3.68 | 2,925 | 84 |
| Nov | 3.10 | 2,464 | |
| Dec | 2.32 | 1,844 |
Jul is the wettest month (4.27 in, 3,394 gal off the roof); Feb the driest (1.68 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 Ashtabula?
Best fit: one 55-gallon barrel, which delivers about 447 gallons to the garden in a normal year (75.6% 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 Ashtabula's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 447 | 27,786 |
| 110 gal | 447 | 27,786 |
| 165 gal | 447 | 27,786 |
| 275 gal | 447 | 27,786 |
| 550 gal | 447 | 27,786 |
| 1,000 gal | 447 | 27,786 |
| 1,500 gal | 447 | 27,786 |
| 2,500 gal | 447 | 27,786 |
| 5,000 gal | 447 | 27,786 |
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