Claremore, OK rainwater: 36,497 gallons off a roof
Rainwater from a roof in Claremore, OK
36,497gallons a year
That is a 1,500 sq ft asphalt roof under Claremore, OK's normal 45.9 inches of rain, about 795 gallons for every inch that falls.
In Claremore, 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 Claremore 2 Ene station (1.7 mi away). Claremore, OK ranks 5th wettest of the 45 cities covered in Oklahoma.
Month by month in Claremore
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 1.80 | 1,431 | |
| Feb | 2.15 | 1,709 | |
| Mar | 3.65 | 2,901 | |
| Apr | 4.93 | 3,918 | |
| May | 6.07 | 4,824 | |
| Jun | 4.97 | 3,950 | |
| Jul | 4.47 | 3,553 | |
| Aug | 3.85 | 3,060 | 62 |
| Sep | 4.02 | 3,195 | 41 |
| Oct | 3.91 | 3,108 | 55 |
| Nov | 3.26 | 2,591 | |
| Dec | 2.84 | 2,257 |
May is the wettest month (6.07 in, 4,824 gal off the roof); Jan the driest (1.80 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 Claremore
Best fit: one 55-gallon barrel, which delivers about 133 gallons to the garden in a normal year (84.0% 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 Claremore's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 133 | 35,390 |
| 110 gal | 133 | 35,390 |
| 165 gal | 133 | 35,390 |
| 275 gal | 133 | 35,390 |
| 550 gal | 133 | 35,390 |
| 1,000 gal | 133 | 35,390 |
| 1,500 gal | 133 | 35,390 |
| 2,500 gal | 133 | 35,390 |
| 5,000 gal | 133 | 35,390 |
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