June weather forecast
Jacksonville, FL

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Water geysers at the fountain of Jacksonville in Florida, USA, with the cityscape
Water geysers at the fountain of Jacksonville in Florida, USA, with the cityscape

Weather in June

June marks the beginning of summer in Jacksonville, offering a notable change in temperature and weather conditions. The city sees the highest increase in rainfall from 2.09" (53mm) in May to 2.8" (71mm), indicating the onset of the rainy season. Despite the increased rain, the temperatures continue to rise, providing a balance between pleasant warmth and refreshing rain showers. This period hints at the Gulf Coast city's tropical climate, maximized through increased humidity levels.

Temperature

As May transitions into June, Jacksonville records an average high-temperature of a tropical 90.1°F (32.3°C), showing a gentle shift from the preceding month. Throughout June, the nighttime temperature in Jacksonville averages to a warm 73.9°F (23.3°C).

Heat index

June's mean heat index is calculated to be a blisteringly hot 107.6°F (42°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
The heat index's values are generally associated with conditions in shade and light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

The average relative humidity in June is 73%.

Rainfall

In June, in Jacksonville, the rain falls for 18.5 days. Throughout June, 2.8" (71mm) of precipitation is accumulated. Throughout the year, in Jacksonville, 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, the average seawater temperature in June is 79.9°F (26.6°C).
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

The month with the longest days in Jacksonville is June, with an average of 14h and 6min of daylight.
On the first day of the month, sunrise is at 6:25 am and sunset at 8:24 pm. On the last day of June, in Jacksonville, Florida, sunrise is at 6:28 am and sunset at 8:32 pm EDT.

Sunshine

In June, the average sunshine in Jacksonville is 10.8h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 7 during June leads to these advisories:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. 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. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Heed this! UV intensity is much stronger when reflected off sand and water.
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Frequently asked questions

How hot does it get in Jacksonville in June?

In June, in Jacksonville, the average high-temperature is 90.1°F (32.3°C), and the average low-temperature is 73.9°F (23.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in June is calculated to be 107.6°F (42°C).

What is the average humidity in June in Jacksonville?

The average relative humidity in June is 73%.

How many days does it rain in June in Jacksonville?

In Jacksonville, during June, the rain falls for 18.5 days and regularly aggregates up to 2.8" (71mm) of precipitation.

When it does not snow in Jacksonville?

January through November are months without snowfall in Jacksonville, Florida.

How warm is the water in June in Jacksonville?

In June, the average ocean temperature is 79.9°F (26.6°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

When are the longest days in Jacksonville?

June has the longest days of the year, with an average of 14h and 6min of daylight.

What is the average length of the day in June in Jacksonville?

In June, the average day length in Jacksonville, Florida, is 14h and 4min.

When are sunrise and sunset in June in Jacksonville?

In June, on the first day of the month, sunrise is at 6:25 am and sunset at 8:24 pm. On the last day of the month, in Jacksonville, Florida, sunrise is at 6:28 am and sunset at 8:32 pm EDT.

How long on average sun shines in June in Jacksonville?

In Jacksonville, Florida, the average sunshine duration in June is 10.8h.

What are the months with the highest UV index in Jacksonville?

The months with the highest UV index are May through August, with an average maximum UV index of 7.

How high is the UV index in June in Jacksonville?

The average daily maximum UV index in June in Jacksonville, Florida, is 7. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in June
Jacksonville, FL

Average temperature in June - Jacksonville, FL
  • Average high temperature in June: 90.1°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 June: 73.9°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).

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Average pressure in June
Jacksonville, FL

Average pressure in June - Jacksonville, FL
  • Average pressure in June: 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).

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Average wind speed in June
Jacksonville, FL

Average wind speed in June - Jacksonville, FL
  • Average wind speed in June: 5.5mph

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).

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Average humidity in June
Jacksonville, FL

Average humidity in June - Jacksonville, FL
  • Average humidity in June: 73%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is March (69%).

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Average rainfall in June
Jacksonville, FL

Average rainfall in June - Jacksonville, FL
  • Average rainfall in June: 2.8"

The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.1").

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Average rainfall days in June
Jacksonville, FL

Average rainfall days in June - Jacksonville, FL
  • Average rainfall days in June: 18.5 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).

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Average snowfall days in June
Jacksonville, FL

Average snowfall days in June - Jacksonville, FL
  • Average snowfall days in June: 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).

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Average sea temperature in June
Jacksonville, FL

Average sea temperature in June - Jacksonville, FL
  • Average sea temperature in June: 79.9°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).

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Average daylight in June /
Average sunshine in June
Jacksonville, FL

Average daylight in June / Average sunshine in June - Jacksonville, FL
  • Average daylight in June: 14h 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 June: 10h and 5min

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).

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Average sunshine days in June
Jacksonville, FL

Average sunshine days in June - Jacksonville, FL
  • Average sunshine days in June: 9 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).

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Average UV index in June
Jacksonville, FL

Average UV index in June - Jacksonville, FL
  • Average UV index in June: 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).

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Average cloud cover in June
Jacksonville, FL

Average cloud cover in June - Jacksonville, FL
  • Average cloud cover in June: 29

The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 27).

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Average visibility in June
Jacksonville, FL

Average visibility in June - Jacksonville, FL
  • Average visibility in June: 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).

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Jacksonville, Florida, USA

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