Late spring · Weather & things to do
Key Largo in May
Key Largo edges warmer than April, with highs of 82°F (28°C), lows of 78°F (26°C) and about 4.6 in (118 mm) of rain.
It scores 77/100 for comfort, 7th of 12, which makes it a solid shoulder-season month.
- Avg high
- 82°F (28°C)
- Avg low
- 78°F (26°C)
- Rain
- 4.6 in (118 mm)
- Humidity
- 74%
- Cloud cover
- 55%
- Daylight
- ~13 h 13 min
- Comfort score
- 77/100 · Great
What May feels like
Highs settle around 82°F (28°C), warm enough for short sleeves most of the day.
Nights stay warm too, with lows averaging 78°F (26°C).
Some rain is likely, about 4.6 in (118 mm) in the month, so pack for a shower or two.
Plan around May
May is shoulder season: good weather, a step below the best months (November – April).
- Comfort slips from 89/100 in April to 77/100.
- May sits inside the Dec – May window our Florida Keys Adventure route recommends.
What to pack for May
- Light, breathable clothes82°F afternoons
- Sunscreen, sunglasses and a hathigh UV on clear days
- Packable rain jacket or umbrellaabout 4.6 in of rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Key Largo in May
With conditions on your side, the picks below favor time outside.
John Pennekamp Coral Reef State Park
First undersea park in the U.S., with snorkel and glass-bottom boat trips to the reef.
Why now Our curated notes say it's best morning, Apr–Sep.
Florida Keys Wild Bird Center
Free sanctuary for injured pelicans, hawks and herons with a boardwalk to Florida Bay.
Why now May scores 77/100 for comfort, good conditions for being outside.
Snappers Oceanfront Restaurant & Bar
Ocean-side tiki bar and seafood restaurant on a canal.
African Queen
The steamboat from the 1951 film, running short canal cruises.
Dagny Johnson Key Largo Hammock Botanical State Park
Largest tract of tropical hardwood hammock in the U.S., with easy trails.
Why now Highs near 82°F and 4.6 in of monthly rain make this an easy outdoor pick.
Nearby in May
- Everglades in May~31 mi · highs 83°F, 4.8 in rain · similar daytime temperatures, about as wet
- Miami in May~49 mi · highs 82°F, 5.3 in rain · similar daytime temperatures, wetter
- Bahia Honda & the Lower Keys in May~59 mi · highs 81°F, 4.0 in rain · similar daytime temperatures, drier
- Key West in May~91 mi · highs 81°F, 3.8 in rain · similar daytime temperatures, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Key Largo in May: quick answers
Is May a good time to visit Key Largo?
It's a good shoulder-season choice, scoring 77/100 against a best of 92 in November – April. Expect highs of 82°F (28°C) and 4.6 in (118 mm) of rain. May is inside the Dec – May window our Florida Keys Adventure route recommends.
How hot is Key Largo in May?
Average highs are 82°F (28°C) and average lows 78°F (26°C), making it the 6th-warmest month by daytime highs.
Does it rain a lot in Key Largo in May?
Some: about 4.6 in (118 mm) of rain falls across May on average, the 5th-wettest month of the year. The annual total is about 48.7 in (1237 mm).
What should I pack for Key Largo in May?
Bring light, breathable clothes (82°F afternoons), sunscreen, sunglasses and a hat (high UV on clear days), packable rain jacket or umbrella (about 4.6 in of rain) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Key Largo
Routes in season in May
- Florida Keys Adventure Dec – May
Planning Key Largo in May?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.