The South Florida wet season, explained
Roughly from May through October, South Florida trades a dry, sunny stretch for daily storms and thick, standing humidity. Here is what actually changes about the air, and what it means for how your cooling system should behave.
When is wet season here, and what actually changes?
South Florida runs on two seasons, not four, and the wet one — roughly May or June into October, overlapping most of hurricane season — changes the cooling equation more than most homeowners realize. It is not simply hotter; it is wetter in a way that outlasts any single storm, with humidity sitting high in the air whether the sky is clearing or building toward the next afternoon cell. A cooling system that only chases the number on the thermostat can leave a home feeling damp and heavy through exactly the months it should feel most comfortable, which is why understanding what wet season actually does matters as much as understanding the heat itself.
Wet season generally runs from May or early June through October, driven by a predictable daily pattern: mornings build heat and moisture, afternoons trigger thunderstorms, and evenings often clear before the cycle repeats. Rainfall is heavier and more frequent than the rest of the year, and the storms can be intense but short, which is part of what makes the humidity tricky — the air can feel just as thick an hour after a downpour as it did before it.
Dry season is the other half of the picture
From roughly November through April, humidity drops noticeably and the daily storm pattern disappears, which is why the same house that feels comfortable at a given thermostat setting in February can feel muggy at that identical setting in August. The temperature swing between the seasons is real but modest; the humidity swing is the bigger story.
A house can hit its set temperature and still feel clammy, because cooling the air and drying it are related jobs, not the same job.
United A/C & RefrigerationWhy does humidity matter as much as the temperature?
Comfort depends on dew point, not just the number on the thermostat, and wet season is when that distinction shows up the most. A home can hit its set temperature and still feel clammy if the system has not removed enough moisture from the air, because cooling and dehumidifying are related but not identical jobs — a system that satisfies the thermostat quickly may not have run long enough to also pull the humidity down. This is why two homes at the same indoor temperature can feel completely different depending on how well each system is handling moisture, and it is the single biggest comfort variable through the wet months.
How does wet season change the way your AC actually runs?
An efficiently sized system runs longer, gentler cycles that steadily wring moisture out of the air along with the heat, which is exactly what wet season demands. An oversized system does the opposite: it satisfies the thermostat fast, shuts off, and leaves excess humidity behind, so the house reads cold on the wall but feels damp in the air — a complaint that gets much more common through the summer than the winter. If a home has felt clammy despite the AC seeming to work fine, wet season is often when that underlying sizing issue finally becomes obvious, and it is worth having it looked at through a proper evaluation rather than just running the system colder.
Does wet season put extra strain on the equipment itself?
Yes, in a few specific ways. Condensate drain lines, which carry away the water a system pulls out of humid air, are more prone to algae growth and clogging during the wettest months simply because there is more moisture moving through them; a clogged line can back up and trigger a safety shutoff or, worse, a leak into the ceiling. Frequent storms also mean more power blips and brief outages, which are hard on compressors that restart under load. Routine maintenance timed before the wet season starts catches a slow drain line and confirms electrical connections before either becomes a mid-summer failure.
What can homeowners do to stay ahead of it?
Scheduling a service visit in spring, before the daily storm pattern sets in, is the single best-timed maintenance window in the local calendar — it catches drainage and electrical issues before the humidity load tests them. Keeping an eye on the condensate line yourself, and knowing where the emergency shutoff float switch is, helps you react quickly if a line does back up. And if a home has felt inconsistently comfortable during past wet seasons despite a working system, it is worth raising that pattern directly rather than assuming it is normal — in this climate, it usually is not.
It also helps to resist the instinct to drop the thermostat further when a house feels sticky. A lower set point cools the air faster but does not necessarily run the system long enough to dry it, so the room can end up colder and just as damp. A system that is cycling correctly and still leaving humidity behind is usually telling you something about sizing or duct leakage, not asking for a colder setting.
How wet season plays out across Broward and southern Palm Beach
The daily storm pattern that defines wet season here builds inland over the Everglades and moves east through the afternoon, which means western Broward communities often see the first cells of the day while the coast stays clear a while longer, before storms push through toward the ocean by late afternoon or evening. Humidity, though, does not respect that timing the same way — it sits heavy across the whole county through the wet months, coastal and inland alike, because the region is surrounded by warm ocean water that keeps feeding moisture into the air regardless of where the storms happen to track that day. Wet season also overlaps hurricane season almost exactly, so the same months that bring daily humidity load also bring the storms worth preparing equipment for. Homeowners across the service area, whether close to the water or well inland, end up managing the same core challenge through these months: keeping a system running efficiently enough, long enough, to actually dry the air rather than just chill it.
Serving Broward County and southern Palm Beach County from our shop in Deerfield Beach.
Questions and answers
When exactly does wet season start and end here?
It typically runs from May or early June through October, tracking closely with the official hurricane season, though the exact start can shift a few weeks year to year. The reliable daily pattern — a buildup through the morning and early afternoon storms — is a better marker than any specific calendar date.
Why does my house feel humid even when the AC is running constantly?
If the system is undersized, or the ductwork is leaking humid attic or outdoor air into the home, it can run nonstop and still lose the humidity fight. It is also possible the system is fine but a return leak or an open damper is pulling in unconditioned air faster than the unit can dry it. This is worth diagnosing rather than just lowering the thermostat further.
Does rain actually cool the house down, or just feel that way?
It can drop the outdoor air temperature briefly, which eases the load on the system for a while, but it also adds moisture, so the net effect on comfort is mixed. A muggy hour right after a downpour is common, because the temperature dropped but the humidity did not.
Should I run a dehumidifier alongside my AC in the summer?
For most homes with a correctly sized, well-maintained system, a separate dehumidifier is not necessary. For a home with a known oversizing issue, a difficult layout, or specific rooms that stay damp, a whole-home dehumidification add-on can help, and it is worth discussing your specific situation rather than assuming you need one.
Why do I need maintenance before wet season if the system is working fine?
Because a slow drain line, a weak capacitor, or a loose electrical connection can be running fine under light load and fail exactly when wet-season demand and storm-related power blips hit hardest. A spring check catches those before they become a July no-cooling call.
Does wet season affect how quickly I should call about a problem?
Somewhat. A system that is behaving oddly heading into wet season is worth addressing sooner rather than later, since the humidity load only makes an existing weakness more obvious, not less. Tell the assistant what you are noticing and we can help you judge how urgent it is.
How we know this
This advice comes from what our technicians actually find on service calls in Broward County and southern Palm Beach — not from national HVAC copy. Salt-air corrosion on the barrier island, drain lines that block every wet season, and equipment running nine months a year are local realities, and they change the right answer.
Worth disclosing: we install Amana equipment, so we are not an independent reviewer. Where a brand or product is discussed we say what it is good and bad at, and we will tell you when the honest answer is to repair what you have or do nothing yet.
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