May weather forecast
Piti, GU

May, often associated with the onset of summer, leads to an increase in temperature in Piti, Guam when compared to April. This month is characterized by higher humidity and more generous sunlight hours, perfect for sunbathing and enjoying the island's sandy beaches. Moving towards June, expect the sea to be even warmer with longer daylight hours. UV index in May maintains a fairly high level of 7, so sunscreen is recommended. However, an abundance of rainfall with an average of 3.31" (84mm) makes May one of the wettest months of the year in Piti.

Temperature

Piti, Guam, transitions into May recording an average high-temperature of a still moderately hot 84.2°F (29°C), closely aligning with the preceding month's temperature. Nighttime temperature reflects an average dip to a still warm 82.2°F (27.9°C) in May, subtly cooler than its daytime highs.

Heat index

The heat index value during May is appraised at a hot 93.2°F (34°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. 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 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.

Humidity

January, March through May, October through December, with an average relative humidity of 78%, are the most humid months.

Rainfall

In May, the rain falls for 23.1 days. Throughout May, 3.31" (84mm) of precipitation is accumulated. In Piti, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

In Piti, in May, the average water temperature is 84°F (28.9°C).
Note: Temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for swimming, diving, and similar water activities, ensuring pleasure and comfort for extended periods without feeling uneasy.

Daylight

In May, the average length of the day is 12h and 45min.
On the first day of the month, sunrise is at 5:59 am and sunset at 6:36 pm. On the last day of May, sunrise is at 5:53 am and sunset at 6:44 pm ChST.

Sunshine

The average sunshine in May in Piti, Guam, is 10.5h.

UV index

The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.