May weather forecast
Boca Raton, FL

May marks the onset of the summer season in Boca Raton with further advancement of temperatures. The number of cloudy days increases, yet the city enjoys a significant amount of sunshine and extended daylight hours. Despite occasional bursts of showers, the weather remains largely warm and dry. An increase in the temperature of the sea aligns with the growing desire for water-related activities. The record precipitation in May is 7.05" (179mm), most of the month’s raindrop history.

Temperature

Welcoming May, Boca Raton notes an average high-temperature of a still warm 81.5°F (27.5°C), nearly consistent with April's 79.2°F (26.2°C). Boca Raton, during the nights of May, averages a temperature close to its daytime high, at a still moderately hot 75.9°F (24.4°C).

Heat index

Throughout May, the heat index is estimated at a tropical 86°F (30°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

In Boca Raton, the average relative humidity in May is 74%.

Rainfall

In Boca Raton, Florida, in May, during 21 rainfall days, 7.05" (179mm) of precipitation is typically accumulated. In Boca Raton, during the entire year, the rain falls for 244.6 days and collects up to 68.54" (1741mm) of precipitation.

Ocean temperature

In May, the average ocean temperature is 80.8°F (27.1°C).
Note: Swimming, diving, and other water-related activities in temperatures between 77°F (25°C) and 84.2°F (29°C) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

In Boca Raton, the average length of the day in May is 13h and 27min.
On the first day of May, sunrise is at 6:42 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 6:27 am and sunset at 8:08 pm EDT.

Sunshine

In May, the average sunshine in Boca Raton is 10.5h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In May, the maximum UV index of 7 transforms into these recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Take note! Sand and water reflections strengthen the Sun's UV exposure.