May weather forecast
Hagåtña, GU

May ushers in the city's slight summer surge, humidity levels remain steady and the temperatures creep a little higher. Outdoor enthusiasts can appreciate the city's serene beaches, delicate rainforests, and vibrant festivals during this month. Be prepared for showers as the month is known to receive a substantial amount of rainfall of 3.31" (84mm) over 23.1 days. This combination of gentle summer sun and nourishing rain creates an enriching environment that brings nature to its resplendent display of life.

Temperature

The arrival of May in Hagåtña brings an average high-temperature of a still warm 84.2°F (29°C), subtly diverging from April's 82.9°F (28.3°C). In the month of May, Hagåtña experiences a minor discrepancy from peak daytime temperatures, settling at an average low-temperature of 82.2°F (27.9°C).

Heat index

May's mean heat index is computed to be 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.
Note that heat index values are valued for light wind and location in the shade. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', reflects the feeling of heat when considering both air temperature and humidity. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.

Humidity

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

Rainfall

In Hagåtña, in May, it is raining for 23.1 days, with typically 3.31" (84mm) of accumulated precipitation. Throughout the year, in Hagåtña, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.

Ocean temperature

In Hagåtña, Guam, the average seawater temperature in May is 84°F (28.9°C).
Note: Water temperatures from 77°F (25°C) to 84.2°F (29°C) make swimming, diving, and similar activities highly pleasurable and enjoyable for long periods without discomfort.

Daylight

The average length of the day in May is 12h and 45min.
On the first day of May in Hagåtña, sunrise is at 5:59 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 6:44 pm ChST.

Sunshine

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 estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 during May translates into the following guidance:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.