Wooster, OH rainwater: 33,366 gallons off a roof
Rainwater from a roof in Wooster, OH
33,366gallons a year
That is a 1,500 sq ft asphalt roof under Wooster, OH's normal 42.0 inches of rain, about 795 gallons for every inch that falls.
In Wooster, 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 Wooster Exp Station station (2.6 mi away). Wooster, OH ranks 91st wettest of the 176 cities covered in Ohio.
Month by month in Wooster
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.59 | 2,059 | |
| Feb | 2.04 | 1,621 | |
| Mar | 2.98 | 2,369 | |
| Apr | 4.04 | 3,211 | 39 |
| May | 4.53 | 3,600 | |
| Jun | 4.77 | 3,791 | |
| Jul | 4.41 | 3,505 | |
| Aug | 3.87 | 3,076 | 60 |
| Sep | 3.58 | 2,845 | 96 |
| Oct | 3.49 | 2,774 | 107 |
| Nov | 2.96 | 2,353 | |
| Dec | 2.72 | 2,162 |
Jun is the wettest month (4.77 in, 3,791 gal off the roof); Feb the driest (2.04 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 Wooster?
Best fit: one 55-gallon barrel, which delivers about 235 gallons to the garden in a normal year (77.9% 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 Wooster's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 235 | 31,841 |
| 110 gal | 235 | 31,841 |
| 165 gal | 235 | 31,841 |
| 275 gal | 235 | 31,841 |
| 550 gal | 235 | 31,841 |
| 1,000 gal | 235 | 31,841 |
| 1,500 gal | 235 | 31,841 |
| 2,500 gal | 235 | 31,841 |
| 5,000 gal | 235 | 31,841 |
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