Whitehall, OH rainwater: 33,040 gallons off a roof
Whitehall, OH: gallons off the roof each year
33,040gallons a year
That is a 1,500 sq ft asphalt roof under Whitehall, OH's normal 41.6 inches of rain, about 795 gallons for every inch that falls.
In Whitehall, 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 Columbus Port Columbus Intl Ap station (1.6 mi away). Whitehall, OH ranks 107th wettest of the 176 cities covered in Ohio.
Month by month in Whitehall
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.00 | 2,384 | |
| Feb | 2.41 | 1,915 | |
| Mar | 3.62 | 2,877 | |
| Apr | 3.85 | 3,060 | 62 |
| May | 3.99 | 3,171 | 45 |
| Jun | 4.33 | 3,442 | 2 |
| Jul | 4.67 | 3,712 | |
| Aug | 3.74 | 2,973 | 76 |
| Sep | 3.14 | 2,496 | 151 |
| Oct | 2.90 | 2,305 | 181 |
| Nov | 2.79 | 2,218 | |
| Dec | 3.13 | 2,488 |
Jul is the wettest month (4.67 in, 3,712 gal off the roof); Feb the driest (2.41 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 Whitehall
Best fit: one 55-gallon barrel, which delivers about 407 gallons to the garden in a normal year (78.7% 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 Whitehall's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 407 | 31,388 |
| 110 gal | 407 | 31,388 |
| 165 gal | 407 | 31,388 |
| 275 gal | 407 | 31,388 |
| 550 gal | 407 | 31,388 |
| 1,000 gal | 407 | 31,388 |
| 1,500 gal | 407 | 31,388 |
| 2,500 gal | 407 | 31,388 |
| 5,000 gal | 407 | 31,388 |
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