September weather forecast
Belleair Bluffs, FL

September, the first month of the autumn in Belleair Bluffs, is also a hot month, with an average temperature varying between 86.2°F (30.1°C) and 77.9°F (25.5°C).

Temperature

The shift into September uncovers an average high-temperature of a still tropical 86.2°F (30.1°C), subtly different from the previous month. An average temperature of 77.9°F (25.5°C) is logged during the nights of September, a small step down from daytime highs.

Heat index

The heat index value for September is calculated to be a very hot 96.8°F (36°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In September, the average relative humidity in Belleair Bluffs is 74%.

Rainfall

In Belleair Bluffs, during September, the rain falls for 20.7 days and regularly aggregates up to 2.17" (55mm) of precipitation. In Belleair Bluffs, during the entire year, the rain falls for 149.9 days and collects up to 16.18" (411mm) of precipitation.

Ocean temperature

In Belleair Bluffs, Florida, in September, the average water temperature is 84.7°F (29.3°C).
Note: Swimming, diving, and other water activities in the temperature range of 77°F (25°C) to 84.2°F (29°C) are perceived as very enjoyable and comfortable for prolonged durations.

Daylight

In Belleair Bluffs, the average length of the day in September is 12h and 19min.
On the first day of the month, sunrise is at 7:10 am and sunset at 7:51 pm. On the last day of September, in Belleair Bluffs, sunrise is at 7:23 am and sunset at 7:18 pm EDT.

Sunshine

In Belleair Bluffs, the average sunshine in September is 9.1h.

UV index

The months with the highest UV index in Belleair Bluffs, Florida, 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 exposure to the Sun's UV radiation for average individuals.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Take note! The UV strength of the Sun elevates when reflected off water and sand.