June weather forecast
Jacksonville, FL

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

Entering June, Jacksonville's average high-temperature reads a tropical 90.1°F (32.3°C), indicating a close resemblance to the previous month's climate. Throughout June, Jacksonville's nights cool down to an average of 73.9°F (23.3°C).

Heat index

In June, the heat index is evaluated at a blistering 107.6°F (42°C). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In Jacksonville, the average relative humidity in June is 73%.

Rainfall

In June, the rain falls for 18.5 days. Throughout June, 2.8" (71mm) 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

January through November are months without snowfall.

Ocean temperature

In June, the average ocean temperature is 79.9°F (26.6°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

June has the longest days of the year in Jacksonville, Florida, 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, sunrise is at 6:28 am and sunset at 8:32 pm EDT.

Sunshine

In Jacksonville, the average sunshine in June 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 unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 7 in June interprets into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Be on guard! The reflective nature of sand and water boosts UV exposure.