Sidney, OH rainwater: 33,104 gallons off a roof
How much rain a roof in Sidney, OH collects
33,104gallons a year
That is a 1,500 sq ft asphalt roof under Sidney, OH's normal 41.7 inches of rain, about 795 gallons for every inch that falls.
In Sidney, 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 Sidney 1 S station (1.6 mi away). Sidney, OH ranks 102nd wettest of the 176 cities covered in Ohio.
Month by month in Sidney
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.89 | 2,297 | |
| Feb | 2.31 | 1,836 | |
| Mar | 3.17 | 2,520 | |
| Apr | 4.08 | 3,243 | 34 |
| May | 4.08 | 3,243 | 34 |
| Jun | 4.70 | 3,736 | |
| Jul | 4.57 | 3,632 | |
| Aug | 3.76 | 2,988 | 74 |
| Sep | 3.11 | 2,472 | 155 |
| Oct | 2.89 | 2,297 | 182 |
| Nov | 3.17 | 2,520 | |
| Dec | 2.92 | 2,321 |
Jun is the wettest month (4.70 in, 3,736 gal off the roof); Feb the driest (2.31 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 Sidney
Best fit: one 55-gallon barrel, which delivers about 377 gallons to the garden in a normal year (79.0% 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 Sidney's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 377 | 31,511 |
| 110 gal | 377 | 31,511 |
| 165 gal | 377 | 31,511 |
| 275 gal | 377 | 31,511 |
| 550 gal | 377 | 31,511 |
| 1,000 gal | 377 | 31,511 |
| 1,500 gal | 377 | 31,511 |
| 2,500 gal | 377 | 31,511 |
| 5,000 gal | 377 | 31,511 |
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