May weather forecastSiantan, Indonesia

Weather in May

The last month of the spring, May, is another tropical month in Siantan, Indonesia, with an average temperature fluctuating between 32.3°C (90.1°F) and 24.3°C (75.7°F).

Temperature

Siantan, Indonesia, experiences a transition to a still tropical 32.3°C (90.1°F) in average high-temperatures with the arrival of May, not greatly differing from April's 31.8°C (89.2°F). May nights cool down to an average low-temperature of 24.3°C (75.7°F).

Heat index

In May, the average heat index is calculated to be a life-threatening hot 47°C (116.6°F). Heed: Expect heat cramps and heat exhaustion. Continued action may cause heatstroke.
For clarity, heat index numbers account for light winds and areas under shade. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In Siantan, the average relative humidity in May is 83%.

Rainfall

In Siantan, in May, during 26.3 rainfall days, 129mm (5.08") of precipitation is typically accumulated. Throughout the year, there are 282.2 rainfall days, and 1495mm (58.86") of precipitation is accumulated.

Daylight

In Siantan, Indonesia, the average length of the day in May is 12h and 7min.
On the first day of May in Siantan, sunrise is at 05:36 and sunset at 17:43. On the last day of the month, sunrise is at 05:36 and sunset at 17:44 WIB.

Sunshine

In May, the average sunshine is 8.2h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 7 during May translates into the following guidance:
Resist overexposure. Safeguarding from solar damage is indispensable. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.