Weatherford, OK rainwater: 23,924 gallons off a roof
How much rain a roof in Weatherford, OK collects
23,924gallons a year
That is a 1,500 sq ft asphalt roof under Weatherford, OK's normal 30.1 inches of rain, about 795 gallons for every inch that falls.
In Weatherford, 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 Weatherford station (1.4 mi away). Weatherford, OK ranks 41st wettest of the 45 cities covered in Oklahoma.
Month by month in Weatherford
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 1.06 | 842 | |
| Feb | 1.18 | 938 | |
| Mar | 2.28 | 1,812 | |
| Apr | 2.79 | 2,218 | 194 |
| May | 4.48 | 3,561 | |
| Jun | 3.95 | 3,139 | 50 |
| Jul | 2.39 | 1,900 | 244 |
| Aug | 3.75 | 2,981 | 75 |
| Sep | 2.42 | 1,923 | 241 |
| Oct | 3.10 | 2,464 | 156 |
| Nov | 1.27 | 1,009 | |
| Dec | 1.43 | 1,137 |
May is the wettest month (4.48 in, 3,561 gal off the roof); Jan the driest (1.06 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
Which tank size is worth it in Weatherford
Best fit: one 55-gallon barrel, which delivers about 825 gallons to the garden in a normal year (85.9% 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 Weatherford's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 825 | 22,408 |
| 110 gal | 828 | 22,405 |
| 165 gal | 828 | 22,405 |
| 275 gal | 828 | 22,405 |
| 550 gal | 828 | 22,405 |
| 1,000 gal | 828 | 22,405 |
| 1,500 gal | 828 | 22,405 |
| 2,500 gal | 828 | 22,405 |
| 5,000 gal | 828 | 22,405 |
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