Twinsburg, OH rainwater: 34,574 gallons off a roof
Twinsburg, OH: gallons off the roof each year
34,574gallons a year
That is a 1,500 sq ft asphalt roof under Twinsburg, OH's normal 43.5 inches of rain, about 795 gallons for every inch that falls.
In Twinsburg, 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 Streetsboro 2.1 Ssw station (9.0 mi away). Twinsburg, OH ranks 41st wettest of the 176 cities covered in Ohio.
Month by month in Twinsburg
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.13 | 2,488 | |
| Feb | 2.66 | 2,114 | |
| Mar | 3.35 | 2,663 | |
| Apr | 3.91 | 3,108 | 55 |
| May | 4.03 | 3,203 | 40 |
| Jun | 4.42 | 3,513 | |
| Jul | 4.25 | 3,378 | 12 |
| Aug | 3.76 | 2,988 | 74 |
| Sep | 3.88 | 3,084 | 59 |
| Oct | 3.49 | 2,774 | 107 |
| Nov | 3.22 | 2,559 | |
| Dec | 3.40 | 2,702 |
Jun is the wettest month (4.42 in, 3,513 gal off the roof); Feb the driest (2.66 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 Twinsburg
Best fit: one 55-gallon barrel, which delivers about 258 gallons to the garden in a normal year (74.4% 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 Twinsburg's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 258 | 32,936 |
| 110 gal | 258 | 32,936 |
| 165 gal | 258 | 32,936 |
| 275 gal | 258 | 32,936 |
| 550 gal | 258 | 32,936 |
| 1,000 gal | 258 | 32,936 |
| 1,500 gal | 258 | 32,936 |
| 2,500 gal | 258 | 32,936 |
| 5,000 gal | 258 | 32,936 |
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