September weather forecast
St. Augustine, FL

As summer winds down, September brings a combinative climatic pattern to St. Augustine, Florida. The city starts witnessing shortened daylight hours, yet the weather retains the warmth typical of the summer months. However, the month bagged highest rainfall measuring an impressive 7.5" (191mm). Despite the rainy period, sun-seekers can still expect exceedingly generous doses of sunshine. Consequently, the city emanates an indomitable spirit in September, overcoming the rains with a radiant disposition.

Temperature

The unfolding of September in St. Augustine shows an average high-temperature of a still tropical 86°F (30°C), indicating a slight variance from August's 89.1°F (31.7°C). During the month of September, an average low-temperature of 71.1°F (21.7°C) is recorded in St. Augustine.

Rainfall

September is the month with the most rainfall in St. Augustine, Florida. Rain falls for 13 days and accumulates 7.52" (191mm) of precipitation.

Ocean temperature

In St. Augustine, in September, the average water temperature is 83.1°F (28.4°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and other activities, ensuring comfort and enjoyment for lengthened periods.

Daylight

In September, the average length of the day in St. Augustine is 12h and 20min.
On the first day of September in St. Augustine, sunrise is at 7:02 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:11 pm EDT.

Sunshine

The average sunshine in September in St. Augustine is 8h.

UV index

In September, the average daily maximum UV index in St. Augustine, Florida, is 9. A UV Index value of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum UV index of 9 in September translates into the following recommendations:
Always stay safe. Unprotected skin and eyes can get damaged rapidly. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Applying and reapplying liberally a broad-spectrum sunscreen of SPF 30+ every two hours, and straight after a swim or outdoor activity is recommended. Caution! The Sun's UV rays become stronger due to reflections from water and sand.