Jasper, IN rainwater: 40,400 gallons off a roof
Jasper, IN: gallons off the roof each year
40,400gallons a year
That is a 1,500 sq ft asphalt roof under Jasper, IN's normal 50.8 inches of rain, about 795 gallons for every inch that falls.
In Jasper, 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 Jasper 5.7 Ese station (5.5 mi away). Jasper, IN ranks 5th wettest of the 88 cities covered in Indiana.
Month by month in Jasper
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 3.74 | 2,973 | |
| Feb | 3.22 | 2,559 | |
| Mar | 4.57 | 3,632 | |
| Apr | 5.67 | 4,507 | |
| May | 5.72 | 4,546 | |
| Jun | 4.48 | 3,561 | |
| Jul | 4.82 | 3,831 | |
| Aug | 3.62 | 2,877 | 91 |
| Sep | 3.67 | 2,917 | 85 |
| Oct | 3.46 | 2,750 | 111 |
| Nov | 4.10 | 3,259 | |
| Dec | 3.76 | 2,988 |
May is the wettest month (5.72 in, 4,546 gal off the roof); Feb the driest (3.22 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 Jasper
Best fit: one 55-gallon barrel, which delivers about 236 gallons to the garden in a normal year (82.3% 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 Jasper's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 236 | 38,933 |
| 110 gal | 236 | 38,933 |
| 165 gal | 236 | 38,933 |
| 275 gal | 236 | 38,933 |
| 550 gal | 236 | 38,933 |
| 1,000 gal | 236 | 38,933 |
| 1,500 gal | 236 | 38,933 |
| 2,500 gal | 236 | 38,933 |
| 5,000 gal | 236 | 38,933 |
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