Newcastle, OK rainwater: 29,344 gallons off a roof
How much rain a roof in Newcastle, OK collects
29,344gallons a year
That is a 1,500 sq ft asphalt roof under Newcastle, OK's normal 36.9 inches of rain, about 795 gallons for every inch that falls.
In Newcastle, 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 Newcastle 3.9 Nnw station (4.4 mi away). Newcastle, OK ranks 26th wettest of the 45 cities covered in Oklahoma.
Month by month in Newcastle
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 1.33 | 1,057 | |
| Feb | 1.56 | 1,240 | |
| Mar | 2.62 | 2,082 | |
| Apr | 3.61 | 2,869 | 92 |
| May | 5.00 | 3,974 | |
| Jun | 4.84 | 3,847 | |
| Jul | 3.70 | 2,941 | 81 |
| Aug | 3.70 | 2,941 | 81 |
| Sep | 3.60 | 2,861 | 94 |
| Oct | 3.23 | 2,567 | 140 |
| Nov | 1.74 | 1,383 | |
| Dec | 1.99 | 1,582 |
May is the wettest month (5.00 in, 3,974 gal off the roof); Jan the driest (1.33 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 Newcastle?
Best fit: one 55-gallon barrel, which delivers about 407 gallons to the garden in a normal year (83.5% 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 Newcastle's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 407 | 28,127 |
| 110 gal | 407 | 28,127 |
| 165 gal | 407 | 28,127 |
| 275 gal | 407 | 28,127 |
| 550 gal | 407 | 28,127 |
| 1,000 gal | 407 | 28,127 |
| 1,500 gal | 407 | 28,127 |
| 2,500 gal | 407 | 28,127 |
| 5,000 gal | 407 | 28,127 |
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