Jenks, OK rainwater: 33,453 gallons off a roof
How much rain a roof in Jenks, OK collects
33,453gallons a year
That is a 1,500 sq ft asphalt roof under Jenks, OK's normal 42.1 inches of rain, about 795 gallons for every inch that falls.
In Jenks, OK 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 Tulsa R L Jones Jr Ap station (2.9 mi away). Jenks, OK ranks 15th wettest of the 45 cities covered in Oklahoma.
Month by month in Jenks
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 1.59 | 1,264 | |
| Feb | 1.80 | 1,431 | |
| Mar | 3.22 | 2,559 | |
| Apr | 4.46 | 3,545 | |
| May | 6.08 | 4,832 | |
| Jun | 4.82 | 3,831 | |
| Jul | 3.82 | 3,036 | 66 |
| Aug | 3.64 | 2,893 | 89 |
| Sep | 3.67 | 2,917 | 85 |
| Oct | 3.84 | 3,052 | 64 |
| Nov | 2.64 | 2,098 | |
| Dec | 2.51 | 1,995 |
May is the wettest month (6.08 in, 4,832 gal off the roof); Jan the driest (1.59 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 Jenks?
Best fit: one 55-gallon barrel, which delivers about 254 gallons to the garden in a normal year (83.8% of its need).
If you set one up, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Jenks's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 254 | 32,300 |
| 110 gal | 254 | 32,300 |
| 165 gal | 254 | 32,300 |
| 275 gal | 254 | 32,300 |
| 550 gal | 254 | 32,300 |
| 1,000 gal | 254 | 32,300 |
| 1,500 gal | 254 | 32,300 |
| 2,500 gal | 254 | 32,300 |
| 5,000 gal | 254 | 32,300 |
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 Oklahoma?
Encouraged through state legislation: Water for 2060 Act
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