Florida Keys Weather in May
May is one of the excellent months to visit Florida Keys, with daytime temperatures of 29°C (84°F) and lows of 24°C (75°F) at night. Do note that quite a bit of rainfall is typical, averaging around 76 mm (3 in).
Rainfall in Florida Keys in May
The climate data from previous years indicates about 12 days of rain, averaging 76 mm (3 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Florida Keys in May
May is a good time to be in Florida Keys. Days are excellent, reaching 29°C (84°F), with nights around 24°C (75°F). This kind of day-to-night contrast is typical for this time of year. With lows around 24°C (75°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Florida Keys in May
There are approximately 341 hours of sunshine this month, resulting in mostly clear days.If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Florida Keys's climate page.
Florida Keys Temperature in May
Min Temperature
24°C (75°F)
Max Temperature
29°C (84°F)
Chance of Rain
40%
Precipitation
76 mm (3 in)
Rainy days
12 days
Humidity
72%
Sunshine
341 hours
Percentage Sunshine
82%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Florida Keys typically stay consistent throughout May, with daily highs averaging around 29°C (84°F). Nights are warm, with lows typically ranging from 22°C (72°F) to 24°C (75°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Florida Keys in May
Browse day-by-day weather records for Florida Keys spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Florida Keys historical weather extremes in May
Based on weather observations in Florida Keys between 1976 and 2026, these are the recorded extremes during May.
- On May 19, 2024, temperatures climbed to 35°C (95°F), marking the warmest May day on record.
- On May 1, 1988, Florida Keys saw its coldest May day with temperatures maxing out at 22°C (72°F).
- The lowest overnight temperature recorded in May was 14°C (57°F) (May 8, 1992).
Best Places in the United States of America in May
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in May →
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What to Wear in Florida Keys in May
Warm weather calls for comfortable, breathable clothing in May. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Rain is likely on several days, so bring a good rain jacket. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Florida Keys in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Florida Keys's climate page.
Temperature Rainfall Sunshine Humidity
See the full Florida Keys climate overview or explore weather in the United States of America.
