Clayton, OH rainwater: 33,167 gallons off a roof
Clayton, OH: gallons off the roof each year
33,167gallons a year
That is a 1,500 sq ft asphalt roof under Clayton, OH's normal 41.7 inches of rain, about 795 gallons for every inch that falls.
In Clayton, 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 Union 1.0 Wsw station (2.0 mi away). Clayton, OH ranks 95th wettest of the 176 cities covered in Ohio.
Month by month in Clayton
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.06 | 2,432 | |
| Feb | 2.52 | 2,003 | |
| Mar | 3.29 | 2,615 | |
| Apr | 4.21 | 3,346 | 17 |
| May | 4.57 | 3,632 | |
| Jun | 4.51 | 3,585 | |
| Jul | 4.30 | 3,418 | 6 |
| Aug | 2.98 | 2,369 | 171 |
| Sep | 3.20 | 2,543 | 143 |
| Oct | 2.87 | 2,281 | 185 |
| Nov | 3.13 | 2,488 | |
| Dec | 3.09 | 2,456 |
May is the wettest month (4.57 in, 3,632 gal off the roof); Feb the driest (2.52 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 Clayton
Best fit: one 55-gallon barrel, which delivers about 429 gallons to the garden in a normal year (82.1% 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 Clayton's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 429 | 31,554 |
| 110 gal | 429 | 31,554 |
| 165 gal | 429 | 31,554 |
| 275 gal | 429 | 31,554 |
| 550 gal | 429 | 31,554 |
| 1,000 gal | 429 | 31,554 |
| 1,500 gal | 429 | 31,554 |
| 2,500 gal | 429 | 31,554 |
| 5,000 gal | 429 | 31,554 |
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