Ogden, UT rainwater: 17,136 gallons off a roof

Ogden, UT: gallons off the roof each year

17,136gallons a year

That is a 1,500 sq ft asphalt roof under Ogden, UT's normal 21.6 inches of rain, about 795 gallons for every inch that falls.

Ogden, UT has gaps between storms long enough to drain a single barrel. Around 165 gallons of storage catches most of what is worth catching.

Rainfall: NOAA 1991-2020 climate normals, the Ogden Pioneer Ph station (1.5 mi away). Ogden, UT ranks 16th wettest of the 67 cities covered in Utah.

Month by month in Ogden

Month	Rain (in)	Off the roof (gal)	Garden shortfall (gal)
Jan	2.51	1,995
Feb	1.85	1,470
Mar	2.27	1,804
Apr	2.45	1,947	237
May	2.58	2,051	221
Jun	1.48	1,176	358
Jul	0.63	501	464
Aug	0.74	588	450
Sep	1.50	1,192	355
Oct	2.12	1,685	278
Nov	1.67	1,327
Dec	1.76	1,399

May is the wettest month (2.58 in, 2,051 gal off the roof); Jul the driest (0.63 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 Ogden

Best fit: 3 linked 55-gallon barrels, which delivers about 1,949 gallons to the garden in a normal year (82.5% of its need).

Before you buy, link barrels with a short hose at the base so they fill and drain together, and check the overflow points away from the house.

Tank	Water used (gal/yr)	Spills over (gal/yr)
55 gal	1,208	15,133
110 gal	1,702	14,639
165 gal	1,949	14,392
275 gal	2,102	14,239
550 gal	2,102	14,239
1,000 gal	2,102	14,239
1,500 gal	2,102	14,239
2,500 gal	2,102	14,239
5,000 gal (over cap)	2,102	14,239

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 Utah?

Up to 2 covered containers of max 100 gal each with no registration; with free registration at the Utah Division of Water Rights, total storage up to 2,500 gal. Use limited to the same parcel where captured.

Checked against the current source on 2026-11-06. Source