The highest day temperature in June 2026 was 90°F. The lowest night temperature was 83°F. The average values for day and night temperatures during June were 88.7°F и 85.5°F respectivly.

The average sea surface temperature in June 2026 for Cayo Guillermo was 89.8°F. The maximum and minimum values were 87.8°F and 91.0°F respectively.

Most of the days in June are cloudy but you can also expect sunny or gloomy days.

Precipitation total in June for Cayo Guillermo is 2.7 in.

The average wind speed in June is 11.7 mph. It makes June one of the most windless months of the year for Cayo Guillermo.

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 Guillermo in June is 8.1 hours.