The highest day temperature in September 2022 was 91°F. The lowest night temperature was 84°F. The average values for day and night temperatures during September were 88.3°F и 86.5°F respectivly.

The average sea surface temperature in September 2022 for Cayo Guillermo was 90.2°F. The maximum and minimum values were 88.4°F and 92.2°F respectively.

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

Precipitation total in September for Cayo Guillermo is 5.1 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 10.4 mph. It makes September the most windless month 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 September is 7.3 hours.