September weather forecast
Marco Island, FL

September carries forward August’s weather patterns, with temperatures and rainfall remaining unchanged. The identical temperatures of 90°F (32.2°C) and 73°F (22.8°C) mark the highs and lows of the day. However, September sees a reduction in rainy days to 15, signaling the start of the gradual transition into the drier season. Despite the occasional showers, Marco Island remains an ideal destination for beachgoers, with clear days making way for beautiful sunsets over the oceanic horizon.

Temperature

Marco Island's temperature peaks during July through September, with an average high-temperature of 89.6°F (32°C).

Rainfall

In Marco Island, during September, the rain falls for 15 days and regularly aggregates up to 8.11" (206mm) of precipitation. In Marco Island, during the entire year, the rain falls for 111 days and collects up to 51.57" (1310mm) of precipitation.

Ocean temperature

In Marco Island, the average seawater temperature in September is 85.6°F (29.8°C).
Note: Water surface temperatures from 77°F (25°C) to 84.2°F (29°C) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.

Daylight

The average length of the day in September in Marco Island is 12h and 18min.
On the first day of September in Marco Island, sunrise is at 7:07 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:14 pm EDT.

Sunshine

The average sunshine in September in Marco Island is 9h.

UV index

The average daily maximum UV index in September is 10. A UV Index of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index, 10 during September, leads to the following recommendations:
Take the necessary steps to protect yourself; unprotected skin and eyes are vulnerable to damage. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. 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. Alert! The Sun's UV rays are heightened by the reflection of sand and water.