Kettering, OH rainwater: 33,104 gallons off a roof
How much rain a roof in Kettering, OH collects
33,104gallons a year
That is a 1,500 sq ft asphalt roof under Kettering, OH's normal 41.7 inches of rain, about 795 gallons for every inch that falls.
In Kettering, 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 Dayton Mcd station (5.1 mi away). Kettering, OH ranks 99th wettest of the 176 cities covered in Ohio.
Month by month in Kettering
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.17 | 2,520 | |
| Feb | 2.35 | 1,868 | |
| Mar | 3.54 | 2,814 | |
| Apr | 4.45 | 3,537 | |
| May | 4.38 | 3,481 | |
| Jun | 4.41 | 3,505 | |
| Jul | 4.03 | 3,203 | 40 |
| Aug | 3.12 | 2,480 | 153 |
| Sep | 3.03 | 2,408 | 165 |
| Oct | 3.00 | 2,384 | 168 |
| Nov | 3.04 | 2,416 | |
| Dec | 3.13 | 2,488 |
Apr is the wettest month (4.45 in, 3,537 gal off the roof); Feb the driest (2.35 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 Kettering?
Best fit: one 55-gallon barrel, which delivers about 433 gallons to the garden in a normal year (82.3% of its need).
If you buy one, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Kettering's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 433 | 31,471 |
| 110 gal | 433 | 31,471 |
| 165 gal | 433 | 31,471 |
| 275 gal | 433 | 31,471 |
| 550 gal | 433 | 31,471 |
| 1,000 gal | 433 | 31,471 |
| 1,500 gal | 433 | 31,471 |
| 2,500 gal | 433 | 31,471 |
| 5,000 gal | 433 | 31,471 |
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