July weather forecast
Sanibel, FL

July in Sanibel is characterized by sweltering weather, high rainfall, and excessively warm sea temperatures. The city experiences its maximum weather extremities in July, with hotter days and increasing amounts of rainfall. Noteworthy, July registers the highest average temperature with a reading of 88°F (31.1°C), ranking it as the hottest month of the year. Despite the intense heat and high rainfall, July offers ample daylight and sufficient sunshine hours, enabling varied outdoor activities. Overall, the weather in July underscores Sanibel's tropical climate while still providing opportunities for enjoyable experiences.

Temperature

The commencement of July in Sanibel introduces an average high-temperature of a still hot 87.4°F (30.8°C), closely mirroring the preceding month. Sanibel observes an average low-temperature of 80.4°F (26.9°C) during the slightly cooler nights of July.

Heat index

July's heat index is estimated at a sweltering 100.4°F (38°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Take note of the fact that heat index values are based on shaded circumstances with light airflows. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The months with the lowest humidity are March, May, July, August and October, with an average relative humidity of 73%.

Rainfall

In Sanibel, in July, during 24.9 rainfall days, 6.73" (171mm) of precipitation is typically accumulated. Throughout the year, in Sanibel, there are 190.9 rainfall days, and 41.73" (1060mm) of precipitation is accumulated.

Ocean temperature

In Sanibel, Florida, the average seawater temperature in July is 85.5°F (29.7°C).
Note: For any water activity, having surface water temperatures from 77°F (25°C) to 84.2°F (29°C) is considered outstanding and highly delightful for lengthened periods.

Daylight

In July, the average length of the day in Sanibel is 13h and 37min.
On the first day of the month, sunrise is at 6:39 am and sunset at 8:25 pm. On the last day of July, sunrise is at 6:53 am and sunset at 8:15 pm EDT.

Sunshine

The average sunshine in July is 10.9h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Sanibel, Florida. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 7 in July interprets into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! Reflections of sand and water make the Sun's UV rays stronger.