September weather forecast
Matlacha, FL

September, the first month of the autumn in Matlacha, is still a hot month, with temperature in the range of an average low of 77.5°F (25.3°C) and an average high of 87.3°F (30.7°C).

Temperature

The transition from August to September brings an average high-temperature of a still tropical 87.3°F (30.7°C), barely different from August's 88.9°F (31.6°C). Matlacha observes an average nighttime temperature of 77.5°F (25.3°C) during September.

Heat index

The heat index in September is appraised at a sweltering 102.2°F (39°C). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Keep in mind the heat index values are meant for areas in shade and with light wind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

September and December, with an average relative humidity of 76%, are the most humid months in Matlacha.

Rainfall

In September, the rain falls for 21.2 days. Throughout September, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 156.4 rainfall days, and 17.95" (456mm) of precipitation is accumulated.

Daylight

The average length of the day in September in Matlacha is 12h and 18min.
On the first day of September in Matlacha, sunrise is at 7:08 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:15 pm EDT.

Sunshine

In Matlacha, the average sunshine in September is 9.1h.

UV index

The months with the highest UV index in Matlacha are May through September, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 7 during September leads to these advisories:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.