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

May's onset in Piti brings an average high-temperature of a still moderately hot 84.2°F (29°C), showing a minute difference from April's 82.9°F (28.3°C). During May, Piti perceives a slight decrease in temperature from daytime highs, settling at an average low of 82.2°F (27.9°C).

Heat index

For most parts of May, the heat index is computed to be a tropical 93.2°F (34°C). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.

Humidity

The months with the highest humidity in Piti, Guam, are January, March through May, October through December, with an average relative humidity of 78%.

Rainfall

In Piti, Guam, during May, the rain falls for 23.1 days and regularly aggregates up to 3.31" (84mm) of precipitation. 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, Guam, in May, the average water temperature is 84°F (28.9°C).
Note: In water temperatures ranging between 77°F (25°C) and 84.2°F (29°C), activities such as swimming and diving become highly pleasurable for long durations.

Daylight

In May, the average length of the day in Piti 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

In Piti, the average sunshine in May is 10.5h.

UV index

The months with the highest UV index in Piti are January through August, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. 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.