Jacksonville
Florida, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Jacksonville, FL

Water geysers at the fountain of Jacksonville in Florida, with the cityscape
Water geysers at the fountain of Jacksonville in Florida, with the cityscape
August, the last month of the summer, in Jacksonville, is another hot month, with average temperature varying between 90.9°F (32.7°C) and 72.7°F (22.6°C).

Temperature

In Jacksonville, the average high-temperature in August is almost the same as in July - a still tropical 90.9°F (32.7°C). In August, in Jacksonville, the average low-temperature is 72.7°F (22.6°C).

Humidity

In Jacksonville, the average relative humidity is 80.3%.

Rainfall

In Jacksonville, Florida, during August, the rain falls for 15 days and regularly aggregates up to 6.8" (172.7mm) of precipitation. Throughout the year, there are 113.5 rainfall days, and 52.4" (1330.6mm) of precipitation is accumulated.

Ocean temperature

August is the month with the warmest seawater in Jacksonville, with an average ocean temperature of 83.5°F (28.6°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Jacksonville, the average length of the day in August is 13.2h.

Sunshine

The average sunshine is 8.5h.

UV index

In Jacksonville, the average daily maximum UV index in August is 10. A UV Index value of 8 to 10 symbolizes a very high health hazard from the exposure to the Sun's UV rays for the average person.
In August, the average maximum UV index of 10 translate into the following recommendations:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in August in Jacksonville?

In Jacksonville, Florida, in August, the average high-temperature is 90.9°F (32.7°C), and the average low-temperature is 72.7°F (22.6°C).

What is the average humidity in August in Jacksonville?

In Jacksonville, Florida, the average relative humidity in August is 80.3%.

How much does it rain in Jacksonville in August?

In August, in Jacksonville, the rain falls for 15 days. Throughout August, 6.8" (172.7mm) of precipitation is accumulated.

When is the ocean warmest in Jacksonville?

The month with the warmest seawater in Jacksonville, Florida, is August, with an average ocean temperature of 83.5°F (28.6°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the water temperature in August in Jacksonville?

In August, the average ocean temperature in Jacksonville, Florida, is 83.5°F (28.6°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Jacksonville have in August?

In Jacksonville, Florida, the average length of the day in August is 13.2h.

How many hours of sunshine does Jacksonville have in August?

In Jacksonville, Florida, the average sunshine in August is 8.5h.

How high is the UV index in August in Jacksonville?

The average daily maximum UV index in August in Jacksonville is 10. A UV Index estimate of 8 to 10 represents a very high health risk from unsafe exposure to the Sun's UV rays.
Average temperature in August - Jacksonville, FL
  • Average high temperature in August: 90.9°F

The warmest month (with the highest average high temperature) is July (92°F).
The month with the lowest average high temperature is January (64.8°F).

  • Average low temperature in August: 72.7°F

The month with the highest average low temperature is August (72.7°F).
The coldest month (with the lowest average low temperature) is January (41.4°F).

Average humidity in August - Jacksonville, FL
  • Average humidity in August: 80.3%

The month with the highest relative humidity is September (80.8%).
The month with the lowest relative humidity is April (69.5%).

Average rainfall in August - Jacksonville, FL
  • Average rainfall in August: 6.8"

The wettest month (with the highest rainfall) is September (8.2").
The driest month (with the lowest rainfall) is November (2.1").

Average rainfall days in August - Jacksonville, FL
  • Average rainfall days in August: 15 days

The month with the highest number of rainy days is August (15 days).
The month with the lowest number of rainy days is April (5.7 days).

Average sea temperature in August - Jacksonville, FL
  • Average sea temperature in August: 83.5°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 August / Average sunshine in August - Jacksonville, FL
  • Average daylight in August: 13.2h

The month with the longest days is June (Average daylight: 14.1h).
The month with shortest days is December (Average daylight: 10.2h).

  • Average sunshine in August: 8.5h

The month with most sunshine is May (Average sunshine: 9.8h).
The month with least sunshine is December (Average sunshine: 5.9h).

Average UV index in August - Jacksonville, FL
  • Average UV index in August: 10

Months with the highest UV index are June and July (UV index 11).
Months with the lowest UV index are January and December (UV index 4).