September weather forecast
Clearwater Beach, FL

September, the first month of the autumn in Clearwater Beach, is still a tropical month, with an average temperature fluctuating between 86.2°F (30.1°C) and 77.9°F (25.5°C).

Temperature

Shifting into September, Clearwater Beach records an average high-temperature of a still tropical 86.2°F (30.1°C), presenting minor fluctuations compared to the previous month. Clearwater Beach, in the month of September, notes an average low temperature of 77.9°F (25.5°C), indicating a small decrease from the daytime highs.

Heat index

The heat index in September is appraised at a torrid 96.8°F (36°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

In Clearwater Beach, the average relative humidity in September is 74%.

Rainfall

In Clearwater Beach, in September, it is raining for 20.7 days, with typically 2.17" (55mm) of accumulated precipitation. In Clearwater Beach, during the entire year, the rain falls for 149.9 days and collects up to 16.18" (411mm) of precipitation.

Daylight

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

Sunshine

The average sunshine in September is 9.1h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 in September translates into these instructions:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. 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. During bright days, sunglasses that offer UVA and UVB defense are recommended.