Brunswick, OH rainwater: 33,962 gallons off a roof
Brunswick, OH: gallons off the roof each year
33,962gallons a year
That is a 1,500 sq ft asphalt roof under Brunswick, OH's normal 42.7 inches of rain, about 795 gallons for every inch that falls.
In Brunswick, 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 Brunswick 0.5 Ne station (0.3 mi away). Brunswick, OH ranks 63rd wettest of the 176 cities covered in Ohio.
Month by month in Brunswick
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.32 | 2,639 | |
| Feb | 2.74 | 2,178 | |
| Mar | 3.44 | 2,734 | |
| Apr | 3.46 | 2,750 | 111 |
| May | 3.87 | 3,076 | 60 |
| Jun | 4.37 | 3,473 | |
| Jul | 4.05 | 3,219 | 37 |
| Aug | 3.43 | 2,726 | 115 |
| Sep | 3.95 | 3,139 | 50 |
| Oct | 3.72 | 2,957 | 79 |
| Nov | 3.20 | 2,543 | |
| Dec | 3.18 | 2,527 |
Jun is the wettest month (4.37 in, 3,473 gal off the roof); Feb the driest (2.74 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 Brunswick
Best fit: one 55-gallon barrel, which delivers about 333 gallons to the garden in a normal year (73.8% 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 Brunswick's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 333 | 32,174 |
| 110 gal | 333 | 32,174 |
| 165 gal | 333 | 32,174 |
| 275 gal | 333 | 32,174 |
| 550 gal | 333 | 32,174 |
| 1,000 gal | 333 | 32,174 |
| 1,500 gal | 333 | 32,174 |
| 2,500 gal | 333 | 32,174 |
| 5,000 gal | 333 | 32,174 |
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