July weather forecast
Key Biscayne, FL

July is a tropical summer month in Key Biscayne, Florida, with temperature in the range of an average low of 81.9°F (27.7°C) and an average high of 86.5°F (30.3°C).

Temperature

The high-temperature average in July for Key Biscayne is a tropical 86.5°F (30.3°C), staying closely aligned with June's conditions. Throughout July, Key Biscayne reports a steady low-temperature average of 81.9°F (27.7°C), slightly lower than its daytime counterpart.

Heat index

For most parts of July, the heat index is estimated at a torrid 96.8°F (36°C). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Key Biscayne, the average relative humidity in July is 72%.

Rainfall

In Key Biscayne, in July, during 21.4 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. Throughout the year, there are 182.7 rainfall days, and 16.38" (416mm) of precipitation is accumulated.

Ocean temperature

In July, the average ocean temperature is 85.3°F (29.6°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

In July, the average length of the day in Key Biscayne, Florida, is 13h and 34min.
On the first day of July in Key Biscayne, sunrise is at 6:33 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 8:07 pm EDT.

Sunshine

With an average of 11.1h of sunshine, July has the most sunshine of the year.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index in Key Biscayne. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A maximum UV index of 7 in July translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Enhance your sun protection with tightly woven, yet airy clothing. Be wary! Reflections from sand and water make UV radiation more intense.