September weather forecast
Mission Bay, FL

The first month of the autumn, September, is also a hot month in Mission Bay, Florida, with an average temperature varying between 86.7°F (30.4°C) and 79.2°F (26.2°C).

Temperature

As Mission Bay, Florida, steps into September, the average high-temperature is measured at a still tropical 86.7°F (30.4°C), displaying minor differences from August's 89.2°F (31.8°C). Mission Bay observes a slightly reduced average nighttime temperature of 79.2°F (26.2°C) during September.

Heat index

During September, the heat index is appraised at a fiery hot 98.6°F (37°C). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

September, October and December, with an average relative humidity of 75%, are the most humid months.

Rainfall

In September, the rain falls for 27.1 days. Throughout September, 5.47" (139mm) of precipitation is accumulated. Throughout the year, in Mission Bay, there are 231 rainfall days, and 37.8" (960mm) of precipitation is accumulated.

Daylight

The average length of the day in September in Mission Bay, Florida, is 12h and 18min.
On the first day of the month, sunrise is at 7:00 am and sunset at 7:40 pm. On the last day of September, in Mission Bay, sunrise is at 7:13 am and sunset at 7:08 pm EDT.

Sunshine

In September, the average sunshine in Mission Bay is 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 unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.