September weather forecast
Marvina, FL

The first month of the autumn, September, is also a hot month in Marvina, Florida, with an average temperature ranging between min 74.8°F (23.8°C) and max 88.7°F (31.5°C).

Temperature

The arrival of September sees an average high-temperature of a still tropical 88.7°F (31.5°C), hardly diverging from August's 90.3°F (32.4°C). During the nights in September, the temperature averages to a warm 74.8°F (23.8°C).

Heat index

September's mean heat index is computed to be an extremely hot 105.8°F (41°C). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

The months with the highest humidity are August, September and December, with an average relative humidity of 76%.

Rainfall

In Marvina, in September, it is raining for 19.6 days, with typically 1.65" (42mm) of accumulated precipitation. Throughout the year, there are 160.9 rainfall days, and 16.77" (426mm) of precipitation is accumulated.

Daylight

In Marvina, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:07 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:15 pm EDT.

Sunshine

In Marvina, the average sunshine in September is 8.9h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Experience reduced UV exposure by about half when donning a wide-brim hat.