Sylvania, OH rainwater: 27,389 gallons off a roof
Rainwater from a roof in Sylvania, OH
27,389gallons a year
That is a 1,500 sq ft asphalt roof under Sylvania, OH's normal 34.5 inches of rain, about 795 gallons for every inch that falls.
In Sylvania, 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 Swanton 6.7 Nne station (7.0 mi away). Sylvania, OH ranks 166th wettest of the 176 cities covered in Ohio.
Month by month in Sylvania
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.19 | 1,741 | |
| Feb | 1.92 | 1,526 | |
| Mar | 2.49 | 1,979 | |
| Apr | 3.23 | 2,567 | 140 |
| May | 3.87 | 3,076 | 60 |
| Jun | 3.43 | 2,726 | 115 |
| Jul | 3.49 | 2,774 | 107 |
| Aug | 3.42 | 2,718 | 116 |
| Sep | 2.97 | 2,361 | 172 |
| Oct | 2.58 | 2,051 | 221 |
| Nov | 2.67 | 2,122 | |
| Dec | 2.20 | 1,749 |
May is the wettest month (3.87 in, 3,076 gal off the roof); Feb the driest (1.92 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 Sylvania
Best fit: one 55-gallon barrel, which delivers about 739 gallons to the garden in a normal year (79.5% 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 Sylvania's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 739 | 25,525 |
| 110 gal | 739 | 25,525 |
| 165 gal | 739 | 25,525 |
| 275 gal | 739 | 25,525 |
| 550 gal | 739 | 25,525 |
| 1,000 gal | 739 | 25,525 |
| 1,500 gal | 739 | 25,525 |
| 2,500 gal | 739 | 25,525 |
| 5,000 gal | 739 | 25,525 |
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