May weather forecast
Marco Island, FL

When May sweeps in, Marco Island welcomes its summertime with an uplift in temperatures. May's unique climatological pattern is marked by a significant jump in rainfall, spiking to 4.1" (104mm) across eight rainy days. The increased rainfall, coupled with the warming weather, drums up the typical tropical climate of Marco Island. The lengthening days invite more sunshine hours, offering longer daylight stretches for outdoor enthusiasts.

Temperature

May's onset records an average high-temperature of a hot 86°F (30°C), a near match to April's 82.4°F (28°C). The average temperature drops to an agreeable 68°F (20°C) during the night in the month of May.

Rainfall

In May, the rain falls for 8 days. Throughout May, 4.06" (103mm) of precipitation is accumulated. In Marco Island, during the entire year, the rain falls for 111 days and collects up to 51.57" (1310mm) of precipitation.

Ocean temperature

In May, the average ocean temperature in Marco Island is 80.1°F (26.7°C).
Note: Water activities in surface temperatures between 77°F (25°C) and 84.2°F (29°C) are seen as exceptional and extremely agreeable for lengthened time spans.

Daylight

The average length of the day in May is 13h and 25min.
On the first day of May, sunrise is at 6:49 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 6:35 am and sunset at 8:14 pm EDT.

Sunshine

April through July, with an average of 10h of sunshine, are months with the most sunshine.

UV index

April through August, with an average maximum UV index of 11, are months with the highest UV index in Marco Island. A UV Index estimate of 11, and higher, represents an extreme threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In May, the average maximum UV index of 11 translates into the following recommendations:
Utilize every vital safety procedure. Individuals with light skin may endure burns in less than 5 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Broad-spectrum SPF 30+ sunscreen must be generously applied and reapplied every two hours or post any outdoor activity or swim. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.