Most people repaint a house either far too early, because they got tired of the color, or years too late, because nobody told them what the warning signs look like. In Central Florida the second mistake is expensive, because once a coating lets go the sun and the rain get straight at whatever is underneath it.
Five things to look for on your own walls
Go outside on a bright morning and walk the whole perimeter of the house. You are looking for five specific things.
1. Chalking. Run your palm down a sunny wall. If it comes away with a fine powder on it, the binder in the paint has broken down under UV. A little chalk after several years is normal. If your hand comes back looking dusty every time, the coating is at the end of its life, and painting straight over chalk is one of the most common reasons a new paint job fails within a year.
2. Fading that is not even. Compare the south and west walls to the north wall. If the color difference is obvious, the sun-facing elevations have taken the damage. You do not always have to do the whole house at once; sometimes the right answer is to do the two elevations that are failing.
3. Hairline cracks where materials meet. Look where trim meets wall, where the garage door frame meets stucco, and around windows. Those joints move with temperature and the caulk in them hardens and splits. Water gets in there long before it gets through a flat wall.
4. Dark shadowing on the shaded side. That is usually mildew, not dirt. Florida gives it everything it needs: warmth and moisture. The University of Florida extension service is blunt about the treatment: mildew has to be physically removed, by scrubbing, and if you only clean it without fixing the moisture source it comes back again and again. Painting over it does not kill it.
5. Peeling, blistering or bubbling. This is not a cosmetic problem and it is not a paint problem. It is almost always water in the substrate or a surface that was not prepared. Painting over it will fail again.
How long should exterior paint last here?
Be suspicious of anybody who gives you a single number. What the coating actually has to survive is measurable, and in this part of Florida it is a lot. Winter Haven Regional Airport averages 46.12 inches of rain a year. The National Weather Service office in Tampa Bay puts the peak thunderstorm season between June and September, and that four-month window alone delivers 55 to 70 percent of the annual rainfall, with July the heaviest month.
Morning relative humidity in Central Florida sits between 82 and 91 percent in every single month of the year. Summer daily maximum temperatures run around 90 degrees. A wall that faces west takes that, all day, for years.
So rather than a number, use the walls. A well-prepared exterior on a well-maintained house will show you the signs above before it fails outright, and that is your window to act.
The best time of year to do it
October through May, if you have the choice.
NOAA records for Tampa, the nearest first-order station, show 16 days with measurable rain in July against five in November. Orlando is 17 against six. That is the difference between roughly one workable dry day in two and one in six being lost.
It is not only the rain. Manufacturer data sheets set real limits. Sherwin-Williams requires the surface to be at least 5 degrees above the dew point and warns against applying if rain is expected within two to three hours. Benjamin Moore caps surface temperature at 90 degrees for its exterior products and states plainly that high humidity lengthens dry and recoat times. In July, a west-facing wall in Polk County can break that surface-temperature limit by the middle of the afternoon while the morning humidity is still near the ceiling.
None of that makes summer painting impossible. It makes it a scheduling problem: start early, get the coat on before the afternoon builds, and accept that some days are simply not paintable. If your job can wait for the drier stretch, it will go faster and it will cure better.
One thing that is not negotiable
If any part of the house has new masonry or new stucco, it has to cure before it is primed. Benjamin Moore specifies thirty days. That is not a company preference, it is on the technical data sheet, and painting a green surface is a guaranteed failure no matter who does it or what they charge.
What to do next
Walk your walls with this list. If you find chalk on your hand or shadowing on the north side, get an estimate that itemises the preparation separately from the paint. If a quote does not mention washing, scraping or caulking at all, you are being quoted for the easy half of the job.
We give free estimates across Lakeland, Winter Haven, Auburndale, Bartow, Medulla and Plant City, in English or Spanish, and we will tell you if your house does not need painting yet.
Sources: National Weather Service Tampa Bay 1991–2020 normals and storm climatology; NOAA NCEI Comparative Climatic Data; UF/IFAS Extension; Sherwin-Williams and Benjamin Moore technical data sheets.