September weather forecast
Roseland, FL

The first month of the autumn, September, is also a moderately hot month in Roseland, Florida, with an average temperature fluctuating between 77.7°F (25.4°C) and 85.1°F (29.5°C).

Temperature

The transition from August to September sees an average high-temperature of a warm 85.1°F (29.5°C), indicating a minor variance from the prior month. A consistent average low-temperature of 77.7°F (25.4°C), with a minor variance from the daytime highs, is noted during the nights of September.

Heat index

Throughout September, the heat index is calculated to be a sweltering 96.8°F (36°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Roseland, the average relative humidity in September is 78%.

Rainfall

In Roseland, in September, it is raining for 23.5 days, with typically 4.53" (115mm) of accumulated precipitation. Throughout the year, there are 205.2 rainfall days, and 38.31" (973mm) of precipitation is accumulated.

Ocean temperature

In Roseland, the average seawater temperature in September is 84°F (28.9°C).
Note: For any water activity, the surface water temperatures in the range of 77°F (25°C) to 84.2°F (29°C) are deemed excellent and incredibly pleasant for longer durations.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September, sunrise is at 7:01 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:08 pm EDT.

Sunshine

In Roseland, the average sunshine in September is 9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 7 in September interprets into the following advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Watch out! Reflections from sand and water can surge UV radiation exposure.