The numbers, city by city
25-year rain for 28 Central Florida cities.
The first number column is the one we size to: the rain a 25-year storm drops in 24 hours.
Swipe the table sideways to see all six columns →
| City | 25-year, 24 hours (in) | 25-year, 1 hour (in) | 25-year peak 5 minutes (in/hr) | 2-year, 24 hours (in) | 100-year, 24 hours (in) |
|---|---|---|---|---|---|
| Orange County | |||||
| Orlando | 7.53 | 3.34 | 10.1 | 4.28 | 10.20 |
| Winter Park | 7.56 | 3.35 | 10.0 | 4.29 | 10.20 |
| Winter Garden | 7.46 | 3.28 | 10.2 | 4.21 | 10.10 |
| Apopka | 7.48 | 3.29 | 10.3 | 4.23 | 10.10 |
| Ocoee | 7.48 | 3.29 | 10.2 | 4.23 | 10.10 |
| Windermere | 7.51 | 3.28 | 10.1 | 4.24 | 10.20 |
| Maitland | 7.56 | 3.34 | 10.0 | 4.28 | 10.20 |
| Seminole County | |||||
| Sanford | 7.79 | 3.32 | 10.1 | 4.28 | 10.70 |
| Lake Mary | 7.68 | 3.32 | 10.1 | 4.27 | 10.50 |
| Oviedo | 7.95 | 3.36 | 10.1 | 4.33 | 10.90 |
| Altamonte Springs | 7.59 | 3.33 | 10.1 | 4.28 | 10.30 |
| Longwood | 7.64 | 3.32 | 10.1 | 4.28 | 10.40 |
| Winter Springs | 7.95 | 3.34 | 10.2 | 4.32 | 10.90 |
| Osceola County | |||||
| Kissimmee | 8.14 | 3.25 | 10.1 | 4.48 | 11.10 |
| St. Cloud | 8.20 | 3.22 | 10.1 | 4.44 | 11.20 |
| Celebration | 7.80 | 3.22 | 10.1 | 4.33 | 10.70 |
| Lake County | |||||
| Clermont | 7.50 | 3.26 | 10.4 | 4.16 | 10.40 |
| Leesburg | 7.63 | 3.26 | 10.7 | 4.19 | 10.60 |
| Mount Dora | 7.42 | 3.27 | 10.5 | 4.18 | 10.10 |
| Tavares | 7.47 | 3.26 | 10.6 | 4.17 | 10.30 |
| Volusia County | |||||
| Daytona Beach | 8.87 | 3.53 | 11.9 | 4.44 | 12.50 |
| DeLand | 8.11 | 3.42 | 10.5 | 4.41 | 11.30 |
| Deltona | 7.98 | 3.35 | 10.2 | 4.32 | 11.10 |
| New Smyrna Beach | 9.43 | 3.43 | 11.5 | 4.75 | 13.10 |
| Brevard County | |||||
| Titusville | 9.40 | 3.50 | 11.3 | 4.61 | 13.20 |
| Cocoa | 9.56 | 3.54 | 11.9 | 4.75 | 13.20 |
| Melbourne | 9.50 | 3.58 | 12.4 | 4.75 | 13.10 |
| Palm Bay | 9.44 | 3.61 | 12.4 | 4.72 | 13.00 |
Source: NOAA Atlas 14, Volume 9, Version 2 (Southeastern States), Precipitation Frequency Data Server, point estimates, partial-duration series, English units. Retrieved November 10, 2026. Values are point estimates at each city's centre and vary by address.
How to read it: “in” is inches of rain over the time shown. “Peak 5 minutes” is a rate: how hard it rains over the worst five minutes, in inches per hour. The 2-year column is the everyday storm. The 100-year column is the rarer one.
Inland and coast
The same “25-year storm” is a different amount of rain depending on where the property is. In the table, the lowest 25-year, 24-hour value is 7.42 inches at Mount Dora, in Lake County. The highest is 9.56 inches at Cocoa, in Brevard County.
Mount Dora is inland. Cocoa is on the Atlantic side. That is why we look up NOAA Atlas 14 rainfall for the address and do not use one number for the whole region.
What that is on a roof
Rain numbers are easier to picture as water coming off a roof. Take a 2,000 sq ft roof in Orlando.
All of that water lands next to the house unless something carries it away. To run the numbers for your own roof, use our calculators.
Roof rain calculatorRoof runoff calculator
Why we size to it
An everyday storm, the 2-year, is about 4.3 inches in 24 hours in Orlando. The 25-year storm is about 7.5. A system sized for the first is overwhelmed by the second.
A 25-year storm is not the biggest storm. The 100-year column in the table shows how much more can fall, and some storms pass even that.
So every FAS system is sized to a 25-year storm, with rain from NOAA Atlas 14. It is the first of the five points in our standard.
Read the FAS Drainage StandardHow much slope does a French drain need?
For $89 we run this 25-year storm across a model of your property, from the roof to the street, and show where water stands, how deep and for how long.
Water MRI · Visualization · A model, not a guarantee.General guidance, not a design for your property.
The offer
Drainage assessment of your property.
Credited toward your project.
- A Water MRI flood simulation: your property modelled, from the roof to the street
- A 25-year storm run across it: where water stands, how deep, for how long
- Reviewed by FAS, with written recommendations
- A field assessment when we need more accuracy, with no second fee
- Credited in full toward a resulting FAS projectOnce, within the project's initial one-third deposit.
How payment works. Requesting is free. FAS confirms the details with you first, then collects the $89.
Book my $89 drainage assessmentNothing is charged when you request.
Concern about your foundation instead? That assessment is free.Where the numbers come from
Sources
- NOAA Atlas 14, Volume 9, Version 2 (Southeastern States), Precipitation Frequency Data Server, point estimates, partial-duration series, English units. https://hdsc.nws.noaa.gov/pfds/. Retrieved November 10, 2026.
Orlando values used on this page: 25-year, 24 hours 7.53 in; 25-year, 1 hour 3.34 in; 25-year peak 5 minutes 10.1 in/hr; 2-year, 24 hours 4.28 in; 100-year, 24 hours 10.2 in. Roof figures are plain arithmetic: roof area times rain depth, at about 7.48 gallons per cubic foot.
Questions
The 25-year storm, in short.
Talk it through
(407) 490-0441Tell us where the water collects and what it has reached. We will tell you what the $89 assessment will show.
Book my $89 drainage assessmentWhat is a 25-year storm?
A 25-year storm is rain heavy enough to come about once every 25 years on average. That is about a 4% chance in any year. It is an average, not a schedule: the chance is the same every year.
How much rain is a 25-year storm in Orlando?
About 7.5 inches in 24 hours (7.53), about 3.3 inches in one hour (3.34), and a peak of about 10 inches per hour over the worst five minutes (10.1). The numbers are from NOAA Atlas 14, read on November 10, 2026.
Is a 25-year storm the same everywhere in Central Florida?
No. In our table of 28 cities the 25-year, 24-hour rain runs from 7.42 inches at Mount Dora to 9.56 inches at Cocoa. Values are point estimates at each city's centre and vary by address.
How much water comes off a roof in a 25-year storm?
At the Orlando peak of about 10 inches per hour, a 2,000 sq ft roof sheds about 208 gallons a minute. About 7.5 inches of rain on that roof in 24 hours is about 9,350 gallons.
Put the water in its place.
Water that stays after every storm keeps working on your foundation, your slab and your walls. Fix it in the dry months, before next summer's rains.
Nothing is charged when you request.