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Gutters · Kissimmee

Gutters in Kissimmee, FL

NOAA Atlas 14 puts a 10-year, five-minute downpour in Kissimmee at 8.81 inches an hour, and the city's Kissimmee 2 weather station logs 52.57 inches of rain in an average year. Gutters in Kissimmee, FL have to carry that short, violent burst, not the yearly total, and drop the water at least a foot from the wall.

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Updated October 2026

Drone view of a single-story home with a brown-gray shingle roof and box vents under large oak trees, a metal carport roof in the corner and a street behind.

Local know-how

8.81 inches an hour, five minutes at a time

NOAA computed those numbers for Kissimmee's own Census point. At the same spot, Atlas 14 gives the 100-year, five-minute rate as 11.9 inches an hour and the 100-year, one-hour rate as 3.83. Over a full day, a 10-year storm drops 6.53 inches here and a 100-year storm 11.

Summer is when the intensity arrives. The Kissimmee 2 station's 1991-2020 normals put 24.77 inches, 47% of the year's rain, in June, July and August, the months when gutters overflow at the corners if they were sized for an average shower.

Ian's flooding in Good Samaritan Village and near Mill Slough came from rising water, which no gutter controls, in a city where water covers 3.2% of the area. A gutter's job is narrower: carry roof water past the foundation and out into the yard.

Code and care

The 6-inch eave rule and Kissimmee's pollen season

Florida's residential code requires gutters with downspouts wherever eaves project less than 6 inches, apart from gable rakes and a roof that drains onto another roof (R318.5). Each downspout then has to empty at least a foot clear of the wall, whether through a buried pipe, an extension or a splash block. Gutters and leaders themselves must be metal or approved plastic, joined and fastened with corrosion-resistant hardware of a compatible material (R903.4.2).

UF/IFAS puts Florida's pollen season from January to June, peaking in March and April, with oaks and pines among the heaviest producers. One Florida insurer advises cleaning gutters at least twice a year, spring and fall, and more often under overhanging trees, so late spring is when Kissimmee downspouts most need clearing before the June storms.

Heavy Florida afternoon downpour pouring off a roof edge with no gutter, splashing mud onto the wall and washing out the flower bed along the foundation (illustration)Illustration

Illustration: roof runoff with no gutter, landing against the foundation.

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Rain on your roof

How much water a Kissimmee roof sheds

Rain on your roof

Preset: 6.53 inches, the 10-year 24-hour rain (NOAA Atlas 14 at Kissimmee).

8,136 gallons run off that roof, all of it toward the gutters and downspouts.

Math: square feet × inches × 0.623 gallons.

Questions

Gutters in Kissimmee: questions

What size gutters does a Kissimmee house need?

It depends on three numbers: the roof area draining to each run, the roof's pitch and the rain rate the gutter is sized for. NOAA Atlas 14 puts Kissimmee's 10-year, five-minute rate at 8.81 inches an hour. Gutter tables turn rain into flow with one constant: 96.15 square feet of roof under 1 inch an hour makes a gallon a minute. So 1,000 square feet of roof at Kissimmee's rate sends about 92 gallons a minute toward the gutter before any pitch factor, more than a 5-inch half-round carries at 74 and within the 110 of a 6-inch at the same slope.

Source: NOAA Atlas 14 at Kissimmee; FBC-Plumbing Table 1106.6 (UpCodes, unofficial transcription); Berger sizing tables, read October 5, 2026.

Related: Gutters

Are gutters required on Kissimmee houses?

Only on some. The Florida residential code requires gutters and downspouts when the eaves project less than 6 inches, except at gable rakes or where one roof drains onto another, and the building code carries the same rule for other buildings (FBC-B 1503.7). Wider eaves make gutters optional under the code. Kissimmee's homes skew older, with a median build year of 1992, so measure the overhang rather than assuming; an added porch or room can have a shorter eave than the main house.

Source: 2023 Florida Building Code, Residential, R318.5 (UpCodes, unofficial transcription), read October 5, 2026.

Related: Gutters

How much water comes off a Kissimmee roof in a big storm?

More than most people guess. At Kissimmee's Census point, NOAA Atlas 14 gives 6.53 inches of rain in 24 hours for a 10-year storm and 11 inches for a 100-year storm. The sizing tables' constant works out to about 0.62 gallons for each inch of rain on each square foot of roof. By that arithmetic a 2,000-square-foot roof sheds roughly 8,150 gallons in a 10-year day of rain and close to 13,700 in a 100-year day, and every downspout carrying it must empty at least a foot from the wall.

Source: NOAA Atlas 14 at Kissimmee; Berger sizing tables, read October 5, 2026.

Related: Gutters

Sources for this page(33)
  1. 1.NWS Melbourne, Post Tropical Cyclone Report: Hurricane Ian (2022). Read Oct 5, 2026.
  2. 2.Water share of total area: 3.2%. U.S. Census Bureau, 2020 Census (TIGERweb tigerWMS_Census2020 MapServer: POP100, HU100, AREALAND, AREAWATER). Read Oct 5, 2026.
  3. 3.Median year homes were built: 1992. U.S. Census Bureau, American Community Survey 2020-2024 5-year estimates (acs2024_5yr), via Census Reporter API. Read Oct 5, 2026.
  4. 4.NOAA NCEI, U.S. Climate Normals 1991-2020 (annual/seasonal), access-data API. Read Oct 5, 2026.
  5. 5.NWS Melbourne, Lightning Information Center. Read Oct 5, 2026.
  6. 6.NOAA Atlas 14 (HDSC Precipitation Frequency Data Server). Read Oct 5, 2026.
  7. 7.2023 Florida Building Code, Plumbing, 8th ed., Chapter 11 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from COM-20 (the research cites it "as COM-20").
  8. 8.bergerbp.com. Read Oct 5, 2026.
  9. 9.2023 Florida Building Code, Residential, 8th ed., R318.5 (UpCodes viewer, unofficial transcription); FBC-Building 1503.7. Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7).
  10. 10.2023 Florida Building Code, Residential, 8th ed., Chapter 8 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from NC-2 (the research cites it "as NC-2").
  11. 11.2023 Florida Building Code, Residential, 8th ed., Chapter 9 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from COM-29 (the research cites it "as COM-29").
  12. 12.blogs.ifas.ufl.edu. Read Oct 5, 2026.
  13. 13.thig.com. Read Oct 5, 2026.
  14. 14.ask.ifas.ufl.edu. Read Oct 5, 2026.
  15. 15.2023 Florida Building Code, Plumbing, 8th ed., Ch. 11 Storm Drainage (1106.1, 1106.3, 1106.6), UpCodes (Florida Building Commission text). Read Oct 5, 2026. unofficial transcription; verify on floridabuilding.org
  16. 16.2023 Florida Building Code, Residential, 8th ed., Ch. 3 Building Planning (R318.5 gutters and downspouts), UpCodes (Florida Building Commission text). Read Oct 5, 2026. unofficial transcription; verify on floridabuilding.org
  17. 17.2023 Florida Building Code, Residential, 8th ed., Ch. 9 Roof Assemblies (R903, R905, R908), International Code Council (Florida Building Commission). Read Oct 5, 2026.
  18. 18.Proper Gutter and Downspout Sizing (SMACNA-style tables), Berger Building Products. Read Oct 5, 2026.
  19. 19.The unwelcome dust that won't quit: pollen season hits with full force (2026-03-17), UF/IFAS. Read Oct 5, 2026.
  20. 20.How often should you clean your gutters? (2025-03-20), Tower Hill Insurance Group. Read Oct 5, 2026.
  21. 21.NOAA Atlas 14 Volume 9 version 2, partial-duration point estimates at Kissimmee (2020 Census internal point), NOAA National Weather Service, Hydrometeorological Design Studies Center. Read Oct 5, 2026.
  22. 22.Florida Building Code effective dates (2001 through 2023 editions), Florida Building Commission. Read Oct 5, 2026.
  23. 23.Florida Statutes, section 553.844 (2026): windstorm loss mitigation, roofing requirements and the 2007-code exception, Florida Legislature. Read Oct 5, 2026.
  24. 24.Florida Statutes, section 627.7011 (2026): homeowners' policies, roof age (subsection 5), Florida Legislature. Read Oct 5, 2026.
  25. 25.Citizens Property Insurance Corporation, Inspections (4-point and roof age requirements), Citizens Property Insurance Corporation. Read Oct 5, 2026.
  26. 26.Citizens 4-Point Inspection Form, Insp4pt 03 25 (roof section), Citizens Property Insurance Corporation. Read Oct 5, 2026.
  27. 27.2023 Florida Building Code, Building, 8th ed., Ch. 1 Scope and Administration (102.8, 105.1, 105.2.2, 107, 110.3), International Code Council (Florida Building Commission). Read Oct 5, 2026.
  28. 28.FEMA Hurricane Michael Recovery Advisory 2: Best Practices to Minimize Wind and Water Infiltration Damage (June 2019), FEMA. Read Oct 5, 2026.
  29. 29.Hurricane Ian in Florida: a mitigation success story for building codes (Building Safety Journal, 2024-02-07), summarizing FEMA P-2342, International Code Council. Read Oct 5, 2026.
  30. 30.UF researchers identify ways to prevent shingle blow-off in hurricanes, University of Florida Herbert Wertheim College of Engineering. Read Oct 5, 2026.
  31. 31.NRCA consumer roofing guidelines and resources, National Roofing Contractors Association. Read Oct 5, 2026.
  32. 32.Florida Senate, SB 808 (2026) staff analysis, The Florida Senate. Read Oct 5, 2026.
  33. 33.NOAA Atlas 14 at Kissimmee: 8.81 in/hr (5-minute, 10-year). NOAA Atlas 14 Precipitation Frequency Data Server. Read Oct 5, 2026.

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Gutters in Kissimmee

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