September weather forecast
Ona, FL

The first month of the autumn, September, is also a hot month in Ona, Florida, with temperature in the range of an average low of 73.8°F (23.2°C) and an average high of 88°F (31.1°C).

Temperature

The arrival of September brings an average high-temperature of a still tropical 88°F (31.1°C), nearly identical to August's 89.8°F (32.1°C). The nighttime temperature in Ona, Florida, dips to a warm 73.8°F (23.2°C) on average during September.

Heat index

The heat index value for September is computed to be a blisteringly hot 107.6°F (42°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

The most humid month in Ona is September, with an average relative humidity of 81%.

Rainfall

In Ona, in September, it is raining for 21 days, with typically 2.32" (59mm) of accumulated precipitation. In Ona, Florida, during the entire year, the rain falls for 175.4 days and collects up to 22.8" (579mm) of precipitation.

Daylight

In Ona, 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 7:47 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:14 pm EDT.

Sunshine

In September, the average sunshine in Ona is 8.8h.

UV index

The months with the highest UV index in Ona are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 7 during September translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.