Central Point, OR rainwater: 14,648 gallons off a roof
Rainwater from a roof in Central Point, OR
14,648gallons a year
That is a 1,500 sq ft asphalt roof under Central Point, OR's normal 18.4 inches of rain, about 795 gallons for every inch that falls.
Central Point, OR's rain arrives in a wet season and stops, so storage is what matters. It takes a cistern of 1,000 gallons to carry spring rain into the dry months.
Rainfall: NOAA 1991-2020 climate normals, the Medford Rogue Vly Ap station (2.0 mi away). Central Point, OR ranks 47th wettest of the 57 cities covered in Oregon.
Month by month in Central Point
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 2.72 | 2,162 | |
| Feb | 1.96 | 1,558 | |
| Mar | 1.81 | 1,439 | |
| Apr | 1.51 | 1,200 | 354 |
| May | 1.34 | 1,065 | 375 |
| Jun | 0.68 | 540 | 458 |
| Jul | 0.24 | 191 | 512 |
| Aug | 0.33 | 262 | 501 |
| Sep | 0.48 | 382 | 482 |
| Oct | 1.22 | 970 | 390 |
| Nov | 2.61 | 2,074 | |
| Dec | 3.53 | 2,806 |
Dec is the wettest month (3.53 in, 2,806 gal off the roof); Jul the driest (0.24 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 Central Point
Best fit: a 1,000-gallon cistern, which delivers about 2,849 gallons to the garden in a normal year (92.7% of its need).
Before you buy, ask about a rebate first: cistern-sized storage costs real money, and a buried or tall tank may need a permit. Place it where a full tank (about 8.3 lb a gallon) sits on firm, level ground.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 970 | 12,928 |
| 110 gal | 1,529 | 12,370 |
| 165 gal | 1,843 | 12,055 |
| 275 gal | 2,205 | 11,693 |
| 550 gal | 2,493 | 11,405 |
| 1,000 gal | 2,849 | 11,049 |
| 1,500 gal | 2,849 | 11,049 |
| 2,500 gal | 2,849 | 11,049 |
| 5,000 gal | 2,849 | 11,049 |
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 Oregon?
Collecting and using rain from an artificial impervious surface (e.g. a rooftop) is an exempt use: no water right application, permit or certificate needed. Statute sets no storage cap in this section.
Checked against the current source on 2026-11-06. Source