July weather forecast
Jacksonville, FL

In the heart of summer, the weather in July substantiates Jacksonville's appeal. The warmth experienced in June escalates, generating a thriving, yet intense, summer. Rainfall hits the peak for the year at 3.23" (82mm), making July the wettest month. Pairing this with the soaring temperatures creates an authentic Floridian summer. Despite occasional bouts of high humidity, it remains a favorite holiday destination for sun and beach enthusiasts.

Temperature

In Jacksonville, Florida, the warmest period comes during July and August, when the average high-temperature touches 91.4°F (33°C).

Heat index

July's average heat index is calculated to be a blazing hot 113°F (45°C). Prudent: Heat cramps and heat exhaustion are likely. Heatstroke becomes imminent with sustained exertion.
Realize that the values for the heat index are set for shaded places and light winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gives an indication of how one might feel in terms of heat after considering humidity. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

The average relative humidity in July is 74%.

Rainfall

In Jacksonville, during July, the rain falls for 22.1 days and regularly aggregates up to 3.23" (82mm) of precipitation. Throughout the year, there are 172.6 rainfall days, and 25.35" (644mm) of precipitation is accumulated.

Snowfall

January through November are months without snowfall.

Ocean temperature

In Jacksonville, the average seawater temperature in July is 82°F (27.8°C).
Note: For swimming, diving, and enjoying other water activities, the range of 77°F (25°C) to 84.2°F (29°C) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.

Daylight

In July, the average length of the day is 13h and 53min.
On the first day of the month, sunrise is at 6:28 am and sunset at 8:32 pm. On the last day of July, in Jacksonville, sunrise is at 6:44 am and sunset at 8:21 pm EDT.

Sunshine

With an average of 10.9h of sunshine, July has the most sunshine of the year in Jacksonville.

UV index

The months with the highest UV index in Jacksonville are May through August, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In July, the average maximum UV index of 7 translates into the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.