September weather forecast
Clearwater, FL

September paves the way for the closing phase of the summers in Clearwater. The frequency of rain begins to decrease, resulting in few sunny days, while the temperatures start a gentle dip after their summer peak. Supplementary hours of sunshine during the day maintain the city's vivacious charm and warmth. September experiences a minor drop in sea temperature, falling to 84.7°F (29.3°C) but still remaining pleasantly warm for beach outgoing’s. The decrease in rainfall coupled with persistent pleasing temperatures makes September alluring for visitors longing for a blend of summer and fall.

Temperature

Clearwater's weather, upon September's arrival, documents an average high-temperature of a still tropical 86.2°F (30.1°C), nearly identical to the prior month. In September, Clearwater temperatures settle at a low of 77.9°F (25.5°C) during the nights, reflecting a minor change from daytime highs.

Heat index

Throughout September, the heat index is appraised at a very hot 96.8°F (36°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Data suggests that the heat index is set for environments in shade and with a light wind. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

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

Rainfall

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

Ocean temperature

In Clearwater, in September, the average water temperature is 84.7°F (29.3°C).
Note: Temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.

Daylight

In September, the average length of the day in Clearwater is 12h and 19min.
On the first day of September in Clearwater, 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

In Clearwater, Florida, the average sunshine in September is 9.1h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In September, the UV index of 7 transforms into the following advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Heads up! UV intensity is amplified by reflections from water and sand.