The highest day temperature in September 2025 was 94°F. The lowest night temperature was 77°F. The average values for day and night temperatures during September were 88.3°F и 81.2°F respectivly.

The average sea surface temperature in September 2025 for West Palm Beach was 90.2°F. The maximum and minimum values were 89.2°F and 92.0°F respectively.

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

Precipitation total in September for West Palm Beach is 2.5 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 8.0 mph. It makes September the most windless month of the year for West Palm Beach.

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 West Palm Beach in September is 5.7 hours.