Florida's Wet & Dry Seasons — The Only Weather Rule You Need to Know
Florida doesn't have four seasons. It has two: wet (May-Oct) and dry (Nov-Apr). Learn the daily-storm pattern, the cold-front rhythm, and the 6am rule that lets you outdoor through the worst of either.
There is one rule that separates locals from tourists in Florida: outdoor stuff happens between 6 AM and noon. Internalise that line and you’ve already absorbed 80% of what’s below.
Florida runs on a two-season calendar, not a four-season one. Winter, spring, summer, fall — useful labels for sweater catalogs, useless for describing what the sky does here. The real seasons are wet and dry, and they behave like two different climates stitched together at May and October.
Two-season Florida
- Wet season — May through October. Subtropical, monsoonal, humid, electric.
- Dry season — November through April. Continental influence, cold fronts, low humidity, calm.
Roughly 60% of Florida’s annual rainfall falls between June and September. The other six months get a handful of frontal passages and the occasional offshore disturbance, and that is it. The two regimes don’t blend — they hand off.
What “wet” actually means
Wet season is not “it rains more.” It’s a specific daily pattern, and once you see it once you’ll see it every day for six months.
Morning: sky is clear. Air is already saturated. Sea breeze begins. Between 2 and 6 PM, the Atlantic and Gulf sea breezes collide over the interior, surface heating cooks the moisture into towering cumulonimbus, and you get thunderheads visible from 80 miles away. Lightning. Rain in sheets.
Cells generally drift east on the west coast, west on the east coast, and stall over the middle. Central Florida — the I-4 corridor near Tampa and Orlando — has the highest cloud-to-ground lightning strike density in the continental US.
Storms typically last 1 to 2 hours, then dissipate around sunset. Sky clears. Stars come out. Tomorrow does the same thing.
Hurricane season runs June 1 to November 30, peaking August through October — a separate concern layered on top of the daily pattern, but the window overlaps almost exactly with wet season.
Mosquitoes own the dusk-and-dawn shoulders. Salt-marsh species (the bite that draws blood) breed on coastal flats; freshwater species swarm any standing water. Aedes aegypti, the daytime urban mosquito that vectors Zika and dengue, prefers neighborhoods over wilderness. Repellent is not optional from May through October.
What “dry” actually means
Dry season is when continental cold fronts finally reach Florida. They start in November as gentle wind shifts and by January and February they punch all the way down to the Keys.
A typical front: 24 hours of brisk north wind, low humidity behind it, overnight lows in the 30s°F in north Florida (Tallahassee, Gainesville, Ocala) and the 50s down south. No thunderstorms. No mosquitoes. Crystal-clear sky.
Diving and snorkelling get better for a specific reason: cold fronts kill the plankton blooms. Visibility on the Keys reefs routinely hits 50+ feet from January through March, vs 20-30 in summer.
Coastal water temperatures lag the air by about a month — peaking around 86°F in September (yes, bathwater), bottoming out around 62°F on the mainland and 70°F in the Keys in February. Wetsuit-optional in the Keys all year; mainland needs a 3mm shorty December through March.
The flip side: wildfire risk peaks March through May. Fuel moisture in the longleaf pine flatwoods drops to its lowest right before the rains return. Controlled burns in national forest lands are common — check air quality before committing to a hike in Ocala or Apalachicola.
How locals plan around it
The 6 AM rule is the operating system:
- May to October: outdoor activity from sunrise to noon. Inside or in a vehicle by 2 PM. Never on open water during the afternoon — lightning kills more people in Florida than anywhere except possibly the Texas Gulf Coast.
- November to April: outdoor anytime. Sunset is 5:30 PM in deep winter, so squeeze the daylight. Dress in layers — a 75°F afternoon on a 38°F morning is normal.
The springs are the year-round cheat code. Every first-magnitude spring in Florida runs 72°F twelve months a year. When the air is 95°F it feels glacial; when the air is 45°F it feels like a hot tub.
What it’s not
Florida is not always sunny. The marketing department lies. June through September gets afternoon storms on probably 70% of days. December and January can bring three- and four-day fronts where temperatures never break 55°F and the sky stays grey. Tallahassee has had ice on the windshield more than once.
The state has weather. Serious weather. Plan for it.
The crossover months
May: still technically dry, but storms start spinning up in the back half. Heat already brutal. Best two weeks of paddling are usually early May, before the chaos.
October: hurricane season still active but daily storms taper off. Humidity drops in the third week. By Halloween you can wear long sleeves at sunrise. Some of the year’s best hiking is the last week of October through Thanksgiving.
Practical card
Wet season (May-Oct): wide-brimmed hat, electrolytes, two litres of water per person; dry bag; Picaridin or DEET (≥30%); long sleeves at dusk; quick-dry layers — cotton kills here in summer. Eyes on the western sky from noon onward; bail before the anvil grows.
Dry season (Nov-Apr): fleece or light puffy for sunrise, off by 11 AM; lip balm and hand cream — humidity drops below 40% on cold-front days; 3mm shorty for mainland water work; no campfires once burn-ban posters go up.
New here? Springs in summer, coasts in winter. Both work counter-seasonally to the air. That is the whole rule.
