Lynn Haven, FL rainwater: 48,698 gallons off a roof
Rainwater from a roof in Lynn Haven, FL
48,698gallons a year
That is a 1,500 sq ft asphalt roof under Lynn Haven, FL's normal 61.3 inches of rain, about 795 gallons for every inch that falls.
In Lynn Haven, FL 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 Panama City 5n station (1.8 mi away). Lynn Haven, FL ranks 59th wettest of the 173 cities covered in Florida.
Month by month in Lynn Haven
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.79 | 3,807 | |
| Feb | 4.95 | 3,934 | |
| Mar | 5.03 | 3,998 | |
| Apr | 4.09 | 3,251 | 32 |
| May | 3.31 | 2,631 | 130 |
| Jun | 5.82 | 4,626 | |
| Jul | 7.41 | 5,890 | |
| Aug | 7.44 | 5,913 | |
| Sep | 6.98 | 5,548 | |
| Oct | 3.45 | 2,742 | 112 |
| Nov | 3.70 | 2,941 | |
| Dec | 4.30 | 3,418 |
Aug is the wettest month (7.44 in, 5,913 gal off the roof); May the driest (3.31 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 Lynn Haven?
Best fit: one 55-gallon barrel, which delivers about 238 gallons to the garden in a normal year (86.8% 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 Lynn Haven's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 238 | 47,290 |
| 110 gal | 238 | 47,290 |
| 165 gal | 238 | 47,290 |
| 275 gal | 238 | 47,290 |
| 550 gal | 238 | 47,290 |
| 1,000 gal | 238 | 47,290 |
| 1,500 gal | 238 | 47,290 |
| 2,500 gal | 238 | 47,290 |
| 5,000 gal | 238 | 47,290 |
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 Florida?
Legal. Florida approves onsite non-potable use of rainwater for landscape irrigation, vehicle washing, filling pools and fountains and, in some local jurisdictions, toilet/urinal flushing (Florida Plumbing Code). No state storage cap or registration for non-potable collection.
Checked against the current source on 2026-11-06. Source