Ashland, OH rainwater: 33,739 gallons off a roof
How much rain a roof in Ashland, OH collects
33,739gallons a year
That is a 1,500 sq ft asphalt roof under Ashland, OH's normal 42.5 inches of rain, about 795 gallons for every inch that falls.
In Ashland, 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 Ashland 3.9 Sw station (4.0 mi away). Ashland, OH ranks 68th wettest of the 176 cities covered in Ohio.
Month by month in Ashland
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.75 | 2,981 | |
| Feb | 1.95 | 1,550 | |
| Mar | 3.61 | 2,869 | |
| Apr | 3.87 | 3,076 | 60 |
| May | 4.02 | 3,195 | 41 |
| Jun | 4.50 | 3,577 | |
| Jul | 4.19 | 3,330 | 20 |
| Aug | 3.92 | 3,116 | 54 |
| Sep | 3.59 | 2,853 | 95 |
| Oct | 2.93 | 2,329 | 177 |
| Nov | 2.93 | 2,329 | |
| Dec | 3.19 | 2,535 |
Jun is the wettest month (4.50 in, 3,577 gal off the roof); Feb the driest (1.95 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 Ashland?
Best fit: one 55-gallon barrel, which delivers about 341 gallons to the garden in a normal year (76.4% 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 Ashland's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 341 | 32,048 |
| 110 gal | 341 | 32,048 |
| 165 gal | 341 | 32,048 |
| 275 gal | 341 | 32,048 |
| 550 gal | 341 | 32,048 |
| 1,000 gal | 341 | 32,048 |
| 1,500 gal | 341 | 32,048 |
| 2,500 gal | 341 | 32,048 |
| 5,000 gal | 341 | 32,048 |
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