May weather forecast
Umatac, GU

As May rolls in, Umatac, Guam welcomes increased rainfall, registering at a high of 3.31" (84mm), a significant leap from April. This surge underscores the ongoing shift towards the inclemency of the rainy season. Amidst this, the weather tames the turbulent winds, making way for a noticeable drop in wind speed. Temperature ledger maintains its consistency, facilitating an enjoyable tropical climate. Concurrently, the steady UV index necessitates the need for sun safety precautions.

Temperature

Umatac's average high-temperature marks a still warm 84.2°F (29°C) with the advent of May, closely mirroring that of the preceding month. Night temperatures during May stabilize at an average of 82.2°F (27.9°C), closely mirroring the daytime temperatures.

Heat index

Throughout May, the heat index is estimated at a hot 93.2°F (34°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Heat index data is primarily for areas with shade and subjected to light winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.

Humidity

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

Rainfall

In Umatac, in May, it is raining for 23.1 days, with typically 3.31" (84mm) of accumulated precipitation. In Umatac, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Daylight

In Umatac, the average length of the day in May is 12h and 44min.
On the first day of May, sunrise is at 6:00 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 6:44 pm ChST.

Sunshine

In Umatac, the average sunshine in May 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 reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index, 7 in May, converts into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.