The highest day temperature in September 2023 was 92°F. The lowest night temperature was 78°F. The average values for day and night temperatures during September were 88.5°F и 82.0°F respectivly.

The average sea surface temperature in September 2023 for Port St. Lucie was 88.4°F. The maximum and minimum values were 86.8°F and 90.2°F respectively.

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

Precipitation total in September for Port St. Lucie is 2.6 in. It makes september the most rainy month of the year.

The average wind speed in September is 8.4 mph. It makes September one of the most windless months of the year for Port St. Lucie.

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 Port St. Lucie in September is 5.8 hours.