May weather forecast
Key Largo, FL

Key Largo ushers in the onset of summer in May, with a conspicuous heat influence compared to April. The sunshine hours plateau, giving way to longer daylight hours, resulting in predominantly sunny days. In consonance with the season, the sea temperature rises, further promoting water-based activities. Despite the high heat, May witnesses the start of the rainy season, with occasional showers predicted. This month's temperature soars to a high of 80.6°F (27°C) and rainfall amounts to 2.64" (67mm).

Temperature

May experiences an average high-temperature of a still moderately hot 80.6°F (27°C), barely different from April's 77.5°F (25.3°C). Key Largo's evenings during May maintain an average temperature of 78.1°F (25.6°C), aligning closely with the daytime temperatures.

Heat index

The heat index value for May is estimated at 84.2°F (29°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.

Humidity

The average relative humidity in May is 75%.

Rainfall

In Key Largo, in May, during 15.3 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. In Key Largo, during the entire year, the rain falls for 190.1 days and collects up to 27.05" (687mm) of precipitation.

Ocean temperature

In Key Largo, Florida, in May, the average water temperature is 81.1°F (27.3°C).
Note: Water temperatures in the range of 77°F (25°C) to 84.2°F (29°C) are warm and delightful, ensuring comfort during water activities over extended periods.

Daylight

In May, the average length of the day is 13h and 22min.
On the first day of the month, sunrise is at 6:45 am and sunset at 7:52 pm. On the last day of May, sunrise is at 6:31 am and sunset at 8:07 pm EDT.

Sunshine

The average sunshine in May is 10.6h.

UV index

April through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 7 in May, converts into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.