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 ushering in of September in St. Augustine brings an average high-temperature of a still tropical 86°F (30°C), closely mirroring the 89.1°F (31.7°C) of August. Throughout the month of September, St. Augustine sees a steady low-temperature average of 71.1°F (21.7°C).

Rainfall

The month with the most rainfall in St. Augustine is September, when the rain falls for 13 days and typically aggregates up to 7.52" (191mm) of precipitation.

Ocean temperature

In September, the average ocean temperature in St. Augustine is 83.1°F (28.4°C).
Note: Surface water temperatures between 77°F (25°C) and 84.2°F (29°C) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.

Daylight

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

Sunshine

In September, the average sunshine in St. Augustine, Florida, is 8h.

UV index

The average daily maximum UV index in September in St. Augustine is 9. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, a regular UV index of 9 translates into these guidelines:
Protection should always be a priority. Skin and eyes are vulnerable without it. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Sunscreen with a sun protection factor of no less than 30 should be used liberally and reapplied frequently on overcast days, including after every swim or outdoor activity. Be on guard! The reflective nature of sand and water boosts UV exposure.