Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall days in August
- Average sea temperature in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
July and August, when the average high-temperature reaches 91.4°F (33°C), are the warmest months.Heat index
August's average heat index is calculated to be a life-threatening hot 114.8°F (46°C). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. 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. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
In August, the average relative humidity is 75%.Rainfall
August is the month with the most rainfall. Rain falls for 23.3 days and accumulates 3.66" (93mm) of precipitation.Snowfall
In Jacksonville, Florida, snow does not fall in January through November.Ocean temperature
With an average ocean temperature of 83.5°F (28.6°C), August is the month with the warmest seawater.Note: For activities in the water such as swimming or diving, temperatures from 77°F (25°C) to 84.2°F (29°C) are considered optimal for prolonged enjoyment without discomfort.
Daylight
In Jacksonville, the average length of the day in August is 13h and 13min.On the first day of August, sunrise is at 6:45 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 7:50 pm EDT.
Sunshine
In Jacksonville, the average sunshine in August is 10.4h.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 radiation for average individuals.Note: The UV index of 7 during August translates into the following guidance:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Beware! Reflecting off water and sand, UV rays are much stronger.
Frequently asked questions
What is the hottest time of year in Jacksonville?
How hot does it get in Jacksonville in August?
What is the average humidity in August in Jacksonville?
What is the rainiest month in Jacksonville?
How much does it rain in Jacksonville in August?
When it does not snow in Jacksonville?
When is the ocean warmest in Jacksonville?
How warm is the water in August in Jacksonville?
How many hours of daylight does Jacksonville have in August?
When is the sunrise / sunset in August in Jacksonville?
How long on average sun shines in August in Jacksonville?
What are the months with the highest UV index in Jacksonville?
What is the UV index intensity in August in Jacksonville?
Average temperature in August
Jacksonville, FL
- Average high temperature in August: 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 August: 76.6°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 August
Jacksonville, FL
- Average pressure in August: 29.98"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 August
Jacksonville, FL
- Average wind speed in August: 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 August
Jacksonville, FL
- Average humidity in August: 75%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (69%).
Average rainfall in August
Jacksonville, FL
- Average rainfall in August: 3.66"
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 August
Jacksonville, FL
- Average rainfall days in August: 23.3 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 August
Jacksonville, FL
- Average snowfall days in August: 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 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: 13h and 1min
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 August: 10h and 2min
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 August
Jacksonville, FL
- Average sunshine days in August: 6.3 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 August
Jacksonville, FL
- Average UV index in August: 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 August
Jacksonville, FL
- Average cloud cover in August: 30
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 August
Jacksonville, FL
- Average visibility in August: 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).
Jacksonville, Florida, USA
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