May weather forecast
Captiva, FL

May brings the onset of summer in Captiva. A significant temperature jump to 83.1°F (28.4°C) signifies the imminent heat. There's a sharp incline in rainfall reaching 0.63" (16mm), hinting at moister conditions. An extended daylight duration of up to 13.5 hours opens extensive recreational prospects. Nonetheless through the perked UV index and soaring temperatures, Captiva remains an enchanting location.

Temperature

Captiva's average high-temperature in May is a still warm 83.1°F (28.4°C), marking an insignificant difference from the 79.5°F (26.4°C) of April. Captiva's average low temperature, barely cooler than the daytime high, steadies at a still warm 74.3°F (23.5°C) during May.

Heat index

The heat index value during May is estimated at a hot 89.6°F (32°C). If activity and exposure persist, they could induce fatigue, leading to possible heat cramps.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.

Humidity

In May, the average relative humidity is 73%.

Rainfall

In Captiva, in May, it is raining for 9.3 days, with typically 0.63" (16mm) of accumulated precipitation. In Captiva, during the entire year, the rain falls for 122 days and collects up to 8.98" (228mm) of precipitation.

Ocean temperature

In May, the average ocean temperature is 78.8°F (26°C).
Note: Engaging in water activities, such as swimming or diving, in temperatures from 77°F (25°C) to 84.2°F (29°C) is very pleasurable for extended periods, without any discomfort.

Daylight

In May, the average length of the day is 13h and 28min.
On the first day of the month, sunrise is at 6:50 am and sunset at 8:01 pm. On the last day of May, sunrise is at 6:35 am and sunset at 8:17 pm EDT.

Sunshine

With an average of 11.1h of sunshine, May has the most sunshine of the year.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index in Captiva. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: The daily high UV index of 7 during May translates into the following recommendations:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take caution! The UV rays from the Sun gain strength from sand and water reflections.