June weather forecast
Key West, FL

June is a distinct month for Key West, as the average temperatures now consistently reach past the 80-degree mark, signifying the start of summer. The perpetual humidity, combined with the recurrent rainfall, brings a unique charm to the city. With longer daylight hours, beach and water-sport activities reach their peak. Nonetheless, June features the highest recorded temperatures, topping at 83.3°F (28.5°C), contributing to the tropical allure for those seeking warmth.

Temperature

The transition into June shows a subtle variation to a still moderately hot 83.3°F (28.5°C) from May's 80.2°F (26.8°C) in the average high-temperature. Key West, in the month of June, notes an average low temperature of 81.5°F (27.5°C), indicating a small decrease from the daytime highs.

Heat index

The heat index value during June is appraised at a hot 91.4°F (33°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.

Humidity

The average relative humidity in June is 77%.

Rainfall

In Key West, during June, the rain falls for 19.5 days and regularly aggregates up to 3.46" (88mm) of precipitation. Throughout the year, there are 199.2 rainfall days, and 31.61" (803mm) of precipitation is accumulated.

Ocean temperature

In Key West, the average seawater temperature in June is 83.3°F (28.5°C).
Note: Water temperature from 77°F (25°C) to 84.2°F (29°C) is considered very warm, making water activities enjoyable for prolonged periods without any uncomfortable sensations.

Daylight

June has the longest days of the year in Key West, with an average of 13h and 36min of daylight.
On the first day of June, sunrise is at 6:38 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 8:20 pm EDT.

Sunshine

In Key West, the average sunshine in June is 10.6h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index in Key West. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A daily high UV index of 7 in June leads to these guidelines:
Fend off overexposure. Sun protection is vital. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.