September weather forecast
Christmas, FL

September, the first month of the autumn in Christmas, is still a tropical month, with an average temperature varying between 74.3°F (23.5°C) and 88.3°F (31.3°C).

Temperature

Christmas marks the start of September with an average high-temperature of a still tropical 88.3°F (31.3°C), hinting at a slight fluctuation from August's 91°F (32.8°C). In Christmas, an average nighttime temperature of 74.3°F (23.5°C) is expected during September.

Heat index

The heat index value for September is evaluated at a scorching 105.8°F (41°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
When assessing, remember that heat index measurements are for light winds and shaded spots. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

July through September, with an average relative humidity of 77%, are the most humid months.

Rainfall

In Christmas, Florida, in September, during 14.5 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. In Christmas, during the entire year, the rain falls for 130.9 days and collects up to 12.17" (309mm) of precipitation.

Daylight

In Christmas, Florida, the average length of the day in September is 12h and 19min.
On the first day of September, sunrise is at 7:02 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 7:10 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

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 risk from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 during September leads to these advisories:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.