Middletown, NY rainwater: 35,289 gallons off a roof
How much rain a roof in Middletown, NY collects
35,289gallons a year
That is a 1,500 sq ft asphalt roof under Middletown, NY's normal 44.4 inches of rain, about 795 gallons for every inch that falls.
In Middletown, NY 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 Middletown 2 Nw station (1.7 mi away). Middletown, NY ranks 56th wettest of the 90 cities covered in New York.
Month by month in Middletown
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.59 | 2,059 | |
| Feb | 2.09 | 1,661 | |
| Mar | 3.02 | 2,400 | |
| Apr | 4.03 | 3,203 | 40 |
| May | 3.80 | 3,020 | 69 |
| Jun | 4.62 | 3,672 | |
| Jul | 4.19 | 3,330 | 20 |
| Aug | 4.49 | 3,569 | |
| Sep | 4.27 | 3,394 | 10 |
| Oct | 4.55 | 3,616 | |
| Nov | 3.21 | 2,551 | |
| Dec | 3.54 | 2,814 |
Jun is the wettest month (4.62 in, 3,672 gal off the roof); Feb the driest (2.09 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
Barrel or cistern in Middletown?
Best fit: one 55-gallon barrel, which delivers about 105 gallons to the garden in a normal year (75.9% 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 Middletown's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 105 | 33,969 |
| 110 gal | 105 | 33,969 |
| 165 gal | 105 | 33,969 |
| 275 gal | 105 | 33,969 |
| 550 gal | 105 | 33,969 |
| 1,000 gal | 105 | 33,969 |
| 1,500 gal | 105 | 33,969 |
| 2,500 gal | 105 | 33,969 |
| 5,000 gal | 105 | 33,969 |
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 New York?
No statewide rainwater harvesting regulations; check county for local incentives
From the 2015 (Pacific Northwest National Laboratory report 24347); not yet re-checked against current law, so check with your state water agency before building anything large. Source