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

Jacksonville sees its peak of temperatures during July and August, with an average high-temperature of 91.4°F (33°C).

Heat index

The average heat index in July is evaluated at a burning hot 113°F (45°C). Keep on guard: Heat exhaustion and heat cramps are probable. Heatstroke is a possible danger with ongoing physical activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. 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. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In July, the average relative humidity 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 in Jacksonville.

Ocean temperature

In Jacksonville, in July, the average water temperature is 82°F (27.8°C).
Note: For any water activity, the surface water temperatures in the range of 77°F (25°C) to 84.2°F (29°C) are deemed excellent and incredibly pleasant for longer durations.

Daylight

The average length of the day in July in Jacksonville 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, 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 are May through August, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 7 during July leads to these instructions:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Note! Reflective surfaces like sand and water heighten the UV radiation levels.