July weather forecastJacksonville, FL
July
Weather in July
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's warmest season falls during July and August, averaging a high-temperature of 91.4°F (33°C).Heat index
In July, the heat index is evaluated at a life-threatening hot 113°F (45°C). Remain alert: Heat exhaustion and heat cramps are predicted. Extended effort can lead to heatstroke.It is emphasized that the heat index's values are meant for shaded zones with mild winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
In July, the average relative humidity is 74%.Rainfall
In July, the rain falls for 22.1 days. Throughout July, 3.23" (82mm) of precipitation is accumulated. In Jacksonville, during the entire year, the rain falls for 172.6 days and collects up to 25.35" (644mm) of precipitation.Snowfall
In Jacksonville, snow does not fall in January through November.Ocean temperature
In Jacksonville, in July, the average water temperature is 82°F (27.8°C).Note: Engaging in water activities, such as swimming or diving, in temperatures from 77°F (25°C) to 84.2°F (29°C) is very pleasurable for extended periods, without any discomfort.
Daylight
In July, the average length of the day is 13h and 53min.On the first day of July, sunrise is at 6:28 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 8:21 pm EDT.
Sunshine
July has the most sunshine of the year, with an average of 10.9h of sunshine.UV index
May through August, 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 vulnerability from exposure to the Sun's UV radiation for the average person.Note: The UV index of 7 in July translates into these instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Boost your sun resistance with garments that are densely woven yet spacious. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Jacksonville, FL
- Average high temperature in July: 91.4°F
The warmest months (with the highest average high temperature) are July and August (91.4°F).
The month with the lowest average high temperature is January (63.1°F).
- Average low temperature in July: 75.9°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (47.8°F).
Average pressure in July
Jacksonville, FL
- Average pressure in July: 30.01"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in July
Jacksonville, FL
- Average wind speed in July: 5.2mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity in July
Jacksonville, FL
- Average humidity in July: 74%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (69%).
Average rainfall in July
Jacksonville, FL
- Average rainfall in July: 3.23"
The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in July
Jacksonville, FL
- Average rainfall days in July: 22.1 days
The month with the highest number of rainy days is August (23.3 days).
The month with the least rainy days is November (9 days).
Average snowfall days in July
Jacksonville, FL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in July
Jacksonville, FL
- Average sea temperature in July: 82°F
The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (60.4°F).
Average daylight in July /
Average sunshine in July
Jacksonville, FL
- Average daylight in July: 13h and 54min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in July: 10h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in July
Jacksonville, FL
- Average sunshine days in July: 6.8 days
The month with the most sunshine days is January (18.8 days).
The month with the least sunshine days is August (6.3 days).
Average UV index in July
Jacksonville, FL
- Average UV index in July: 7
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in July
Jacksonville, FL
- Average cloud cover in July: 28
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 27).
Average visibility in July
Jacksonville, FL
- Average visibility in July: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
