The highest day temperature in September 2023 was 101°F. The lowest night temperature was 68°F. The average values for day and night temperatures during September were 92.2°F и 75.9°F respectivly.

The average sea surface temperature in September 2023 for St. Augustine was 87.1°F. The maximum and minimum values were 84.8°F and 88.4°F respectively.

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

Precipitation total in September for St. Augustine is 2.3 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 4.5 mph. This value is relatively stable throughout the year.

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 St. Augustine in September is 6.1 hours.