The highest day temperature in September 2026 was 95°F. The lowest night temperature was 83°F. The average values for day and night temperatures during September were 89.2°F и 86.8°F respectivly.

The average sea surface temperature in September 2026 for Cayo Santa Maria was 90.8°F. The maximum and minimum values were 89.4°F and 92.4°F respectively.

You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in September for Cayo Santa Maria is 4.2 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 10.7 mph. It makes September the most windless month of the year for Cayo Santa Maria.

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 Santa Maria in September is 7.2 hours.