May weather forecast
Biak, Indonesia

A noticeable shift in Biak's weather becomes evident in May, as rainfall drops to 164mm (6.46"), signaling the start of a drier phase over the coming few months. A marked decrease in cloud cover is also observed, causing an incrementally increased amount of sunlight received. Though this reduction in rainfall is significant, the weather continues to remain characteristically tropical. While May marks a transition towards a less rainy period, it retains elements of the climate from the previous month, yet with a lower relative humidity. Milder environmental conditions, coupled with the steady sea temperature, offer an inviting scenario for watersports enthusiasts and holiday makers alike.

Temperature

The average high-temperature during May is a still warm 29.8°C (85.6°F), almost matching the conditions of the preceding month. Biak's nighttime temperature in May experiences a slight dip from daytime highs, falling to an average of 26.3°C (79.3°F).

Heat index

The heat index value for May is calculated to be a torrid 37°C (98.6°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
In the scope of the heat index, its values resonate with shade and light wind conditions. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

The average relative humidity in May is 79%.

Rainfall

In May, in Biak, the rain falls for 28 days. Throughout May, 164mm (6.46") of precipitation is accumulated. In Biak, during the entire year, the rain falls for 323.4 days and collects up to 2132mm (83.94") of precipitation.

Sea temperature

January through October and December, with an average sea temperature of 29°C (84.2°F), are months with the coldest seawater.
Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are considered superb and highly pleasant for water activities over extended periods.

Daylight

The average length of the day in May is 12h and 4min.
On the first day of the month, sunrise is at 05:50 and sunset at 17:55. On the last day of May, in Biak, sunrise is at 05:51 and sunset at 17:55 WIT.

Sunshine

In Biak, Indonesia, the average sunshine in May is 8.1h.

UV index

January, March through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In May, an average UV index of 7 transforms into the following instructions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Attention! UV strength is notably upped by the reflection of sand and water.