Seymour, IN rainwater: 39,398 gallons off a roof
How much rain a roof in Seymour, IN collects
39,398gallons a year
That is a 1,500 sq ft asphalt roof under Seymour, IN's normal 49.6 inches of rain, about 795 gallons for every inch that falls.
In Seymour, 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 Seymour 2 N station (2.5 mi away). Seymour, IN ranks 6th wettest of the 88 cities covered in Indiana.
Month by month in Seymour
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.39 | 2,694 | |
| Feb | 3.09 | 2,456 | |
| Mar | 4.26 | 3,386 | |
| Apr | 5.43 | 4,316 | |
| May | 5.43 | 4,316 | |
| Jun | 4.99 | 3,966 | |
| Jul | 4.18 | 3,322 | 21 |
| Aug | 4.31 | 3,426 | 5 |
| Sep | 3.36 | 2,671 | 123 |
| Oct | 3.59 | 2,853 | 95 |
| Nov | 3.72 | 2,957 | |
| Dec | 3.82 | 3,036 |
Apr is the wettest month (5.43 in, 4,316 gal off the roof); Feb the driest (3.09 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 Seymour?
Best fit: one 55-gallon barrel, which delivers about 203 gallons to the garden in a normal year (83.1% 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 Seymour's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 203 | 38,011 |
| 110 gal | 203 | 38,011 |
| 165 gal | 203 | 38,011 |
| 275 gal | 203 | 38,011 |
| 550 gal | 203 | 38,011 |
| 1,000 gal | 203 | 38,011 |
| 1,500 gal | 203 | 38,011 |
| 2,500 gal | 203 | 38,011 |
| 5,000 gal | 203 | 38,011 |
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