Fishers, IN rainwater: 36,490 gallons off a roof
Fishers, IN: gallons off the roof each year
36,490gallons a year
That is a 1,500 sq ft asphalt roof under Fishers, IN's normal 45.9 inches of rain, about 795 gallons for every inch that falls.
In Fishers, IN 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 Mccordsville 2.6 Ne station (4.0 mi away). Fishers, IN ranks 21st wettest of the 88 cities covered in Indiana.
Month by month in Fishers
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.13 | 2,488 | |
| Feb | 2.50 | 1,987 | |
| Mar | 3.72 | 2,957 | |
| Apr | 4.57 | 3,632 | |
| May | 4.51 | 3,585 | |
| Jun | 5.23 | 4,157 | |
| Jul | 5.14 | 4,085 | |
| Aug | 3.30 | 2,623 | 131 |
| Sep | 3.68 | 2,925 | 84 |
| Oct | 3.39 | 2,694 | 120 |
| Nov | 3.73 | 2,965 | |
| Dec | 3.01 | 2,392 |
Jun is the wettest month (5.23 in, 4,157 gal off the roof); Feb the driest (2.50 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 Fishers
Best fit: one 55-gallon barrel, which delivers about 272 gallons to the garden in a normal year (81.4% 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 Fishers's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 272 | 34,958 |
| 110 gal | 272 | 34,958 |
| 165 gal | 272 | 34,958 |
| 275 gal | 272 | 34,958 |
| 550 gal | 272 | 34,958 |
| 1,000 gal | 272 | 34,958 |
| 1,500 gal | 272 | 34,958 |
| 2,500 gal | 272 | 34,958 |
| 5,000 gal | 272 | 34,958 |
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 Indiana?
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