September weather forecast
Saint Pete Beach, FL

September, the first month of the autumn in Saint Pete Beach, is still a hot month, with an average temperature varying between 86.5°F (30.3°C) and 77.9°F (25.5°C).

Temperature

The unfolding of September shows an average high-temperature of a still hot 86.5°F (30.3°C), indicating a slight variance from August's 87.8°F (31°C). September notes an average low temperature of 77.9°F (25.5°C), subtly down from the daytime highs.

Heat index

For September, the heat index is appraised at a sweltering 98.6°F (37°C). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. 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. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

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

Rainfall

In Saint Pete Beach, Florida, in September, during 6.5 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Saint Pete Beach, during the entire year, the rain falls for 60.4 days and collects up to 5.16" (131mm) of precipitation.

Ocean temperature

In Saint Pete Beach, the average seawater temperature in September is 84.7°F (29.3°C).
Note: For swimming, diving, and similar activities, the water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

In September, the average length of the day in Saint Pete Beach is 12h and 19min.
On the first day of September in Saint Pete Beach, Florida, 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 7:17 pm EDT.

Sunshine

In September, the average sunshine in Saint Pete Beach, Florida, is 9.3h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Enhance your sun protection with tightly woven, yet airy clothing. Attention! UV radiation is markedly stronger with water and sand reflections.