Springfield, OH rainwater: 33,827 gallons off a roof
Springfield, OH: gallons off the roof each year
33,827gallons a year
That is a 1,500 sq ft asphalt roof under Springfield, OH's normal 42.6 inches of rain, about 795 gallons for every inch that falls.
In Springfield, 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 Springfield 2 Wsw station (2.9 mi away). Springfield, OH ranks 66th wettest of the 176 cities covered in Ohio.
Month by month in Springfield
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.99 | 2,376 | |
| Feb | 2.43 | 1,931 | |
| Mar | 3.32 | 2,639 | |
| Apr | 4.26 | 3,386 | 11 |
| May | 4.69 | 3,728 | |
| Jun | 4.56 | 3,624 | |
| Jul | 4.54 | 3,608 | |
| Aug | 3.18 | 2,527 | 146 |
| Sep | 3.25 | 2,583 | 137 |
| Oct | 2.98 | 2,369 | 171 |
| Nov | 3.10 | 2,464 | |
| Dec | 3.26 | 2,591 |
May is the wettest month (4.69 in, 3,728 gal off the roof); Feb the driest (2.43 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 Springfield
Best fit: one 55-gallon barrel, which delivers about 378 gallons to the garden in a normal year (81.3% 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 Springfield's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 378 | 32,249 |
| 110 gal | 378 | 32,249 |
| 165 gal | 378 | 32,249 |
| 275 gal | 378 | 32,249 |
| 550 gal | 378 | 32,249 |
| 1,000 gal | 378 | 32,249 |
| 1,500 gal | 378 | 32,249 |
| 2,500 gal | 378 | 32,249 |
| 5,000 gal | 378 | 32,249 |
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