Painesville, OH rainwater: 32,158 gallons off a roof
Rainwater from a roof in Painesville, OH
32,158gallons a year
That is a 1,500 sq ft asphalt roof under Painesville, OH's normal 40.5 inches of rain, about 795 gallons for every inch that falls.
In Painesville, 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 Painesville 4 Nw station (2.9 mi away). Painesville, OH ranks 138th wettest of the 176 cities covered in Ohio.
Month by month in Painesville
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.14 | 2,496 | |
| Feb | 2.15 | 1,709 | |
| Mar | 2.83 | 2,249 | |
| Apr | 3.47 | 2,758 | 110 |
| May | 3.42 | 2,718 | 116 |
| Jun | 3.63 | 2,885 | 90 |
| Jul | 4.12 | 3,275 | 29 |
| Aug | 3.44 | 2,734 | 113 |
| Sep | 3.91 | 3,108 | 55 |
| Oct | 4.04 | 3,211 | 39 |
| Nov | 3.17 | 2,520 | |
| Dec | 3.14 | 2,496 |
Jul is the wettest month (4.12 in, 3,275 gal off the roof); Feb the driest (2.15 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
What size rain barrel for Painesville
Best fit: one 55-gallon barrel, which delivers about 424 gallons to the garden in a normal year (76.9% 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 Painesville's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 424 | 30,444 |
| 110 gal | 424 | 30,444 |
| 165 gal | 424 | 30,444 |
| 275 gal | 424 | 30,444 |
| 550 gal | 424 | 30,444 |
| 1,000 gal | 424 | 30,444 |
| 1,500 gal | 424 | 30,444 |
| 2,500 gal | 424 | 30,444 |
| 5,000 gal | 424 | 30,444 |
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