Tipp City, OH rainwater: 33,000 gallons off a roof
Tipp City, OH: gallons off the roof each year
33,000gallons a year
That is a 1,500 sq ft asphalt roof under Tipp City, OH's normal 41.5 inches of rain, about 795 gallons for every inch that falls.
In Tipp City, 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 Tipp City station (1.2 mi away). Tipp City, OH ranks 112th wettest of the 176 cities covered in Ohio.
Month by month in Tipp City
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.05 | 2,424 | |
| Feb | 2.32 | 1,844 | |
| Mar | 3.28 | 2,607 | |
| Apr | 4.16 | 3,306 | 24 |
| May | 4.87 | 3,871 | |
| Jun | 4.45 | 3,537 | |
| Jul | 4.20 | 3,338 | 19 |
| Aug | 2.78 | 2,210 | 196 |
| Sep | 3.44 | 2,734 | 113 |
| Oct | 2.84 | 2,257 | 188 |
| Nov | 3.09 | 2,456 | |
| Dec | 3.04 | 2,416 |
May is the wettest month (4.87 in, 3,871 gal off the roof); Feb the driest (2.32 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 Tipp City
Best fit: one 55-gallon barrel, which delivers about 442 gallons to the garden in a normal year (81.9% 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 Tipp City's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 442 | 31,374 |
| 110 gal | 442 | 31,374 |
| 165 gal | 442 | 31,374 |
| 275 gal | 442 | 31,374 |
| 550 gal | 442 | 31,374 |
| 1,000 gal | 442 | 31,374 |
| 1,500 gal | 442 | 31,374 |
| 2,500 gal | 442 | 31,374 |
| 5,000 gal | 442 | 31,374 |
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