The highest day temperature in September 2025 was 91°F. The lowest night temperature was 78°F. The average values for day and night temperatures during September were 88.2°F и 78.8°F respectivly.

The average sea surface temperature in September 2025 for Cumana was 86.8°F. The maximum and minimum values were 84.8°F and 88.6°F respectively.

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

Precipitation total in September for Cumana is 1.5 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 5.2 mph. It makes September the most windless month of the year for Cumana.

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 Cumana in September is 6.7 hours.