September weather forecast
Brewster, FL

The first month of the autumn, September, is also a hot month in Brewster, Florida, with an average temperature varying between 73.6°F (23.1°C) and 88°F (31.1°C).

Temperature

The advent of September denotes an average high-temperature of a still tropical 88°F (31.1°C), subtly different from August's 89.8°F (32.1°C). Brewster records an average low-temperature of 73.6°F (23.1°C) throughout the month of September.

Heat index

For most parts of September, the heat index is calculated to be a scorching 105.8°F (41°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

With an average relative humidity of 80%, September is the most humid month.

Rainfall

In Brewster, Florida, in September, during 23.5 rainfall days, 4.09" (104mm) of precipitation is typically accumulated. Throughout the year, there are 195.2 rainfall days, and 35.47" (901mm) of precipitation is accumulated.

Daylight

In Brewster, the average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

In September, the average sunshine in Brewster, Florida, is 8.8h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.