Tallmadge, OH rainwater: 33,048 gallons off a roof
How much rain a roof in Tallmadge, OH collects
33,048gallons a year
That is a 1,500 sq ft asphalt roof under Tallmadge, OH's normal 41.6 inches of rain, about 795 gallons for every inch that falls.
In Tallmadge, 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 Stow 4 Se station (2.2 mi away). Tallmadge, OH ranks 104th wettest of the 176 cities covered in Ohio.
Month by month in Tallmadge
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.09 | 2,456 | |
| Feb | 2.55 | 2,027 | |
| Mar | 3.18 | 2,527 | |
| Apr | 3.69 | 2,933 | 82 |
| May | 4.12 | 3,275 | 29 |
| Jun | 4.08 | 3,243 | 34 |
| Jul | 4.20 | 3,338 | 19 |
| Aug | 3.48 | 2,766 | 108 |
| Sep | 3.79 | 3,012 | 70 |
| Oct | 3.34 | 2,655 | 126 |
| Nov | 2.99 | 2,376 | |
| Dec | 3.07 | 2,440 |
Jul is the wettest month (4.20 in, 3,338 gal off the roof); Feb the driest (2.55 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 Tallmadge
Best fit: one 55-gallon barrel, which delivers about 372 gallons to the garden in a normal year (79.6% 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 Tallmadge's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 372 | 31,626 |
| 110 gal | 372 | 31,626 |
| 165 gal | 372 | 31,626 |
| 275 gal | 372 | 31,626 |
| 550 gal | 372 | 31,626 |
| 1,000 gal | 372 | 31,626 |
| 1,500 gal | 372 | 31,626 |
| 2,500 gal | 372 | 31,626 |
| 5,000 gal | 372 | 31,626 |
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