The highest day temperature in May 2025 was 108°F. The lowest night temperature was 72°F. The average values for day and night temperatures during May were 101.7°F и 78.2°F respectivly.

The average sea surface temperature in May 2025 for Cayo Largo was 89.1°F. The maximum and minimum values were 84.6°F and 92.2°F respectively.

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation total in May for Cayo Largo is 4.0 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 10.7 mph. It makes May one of the most windless months of the year for Cayo Largo.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Cayo Largo in May is 8.8 hours.