Ironton, OH rainwater: 37,102 gallons off a roof
Ironton, OH: gallons off the roof each year
37,102gallons a year
That is a 1,500 sq ft asphalt roof under Ironton, OH's normal 46.7 inches of rain, about 795 gallons for every inch that falls.
In Ironton, 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 Ashland station (6.5 mi away). Ironton, OH ranks 11th wettest of the 176 cities covered in Ohio.
Month by month in Ironton
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.51 | 2,790 | |
| Feb | 3.69 | 2,933 | |
| Mar | 4.36 | 3,465 | |
| Apr | 3.85 | 3,060 | 62 |
| May | 4.85 | 3,855 | |
| Jun | 4.46 | 3,545 | |
| Jul | 4.58 | 3,640 | |
| Aug | 3.91 | 3,108 | 55 |
| Sep | 3.32 | 2,639 | 128 |
| Oct | 2.97 | 2,361 | 172 |
| Nov | 2.98 | 2,369 | |
| Dec | 4.20 | 3,338 |
May is the wettest month (4.85 in, 3,855 gal off the roof); Oct the driest (2.97 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 Ironton
Best fit: one 55-gallon barrel, which delivers about 331 gallons to the garden in a normal year (79.3% 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 Ironton's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 331 | 35,405 |
| 110 gal | 331 | 35,405 |
| 165 gal | 331 | 35,405 |
| 275 gal | 331 | 35,405 |
| 550 gal | 331 | 35,405 |
| 1,000 gal | 331 | 35,405 |
| 1,500 gal | 331 | 35,405 |
| 2,500 gal | 331 | 35,405 |
| 5,000 gal | 331 | 35,405 |
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