May weather forecastJember, Indonesia

Weather in May

May in Jember, Indonesia, is marked by a significant reduction in cloud cover, precipitation, and humidity, culminating in a noticeably drier climate. Building on the weather patterns developed in April, rainfall drops drastically to 82mm (3.23"). This change accompanies a substantial increase in the number of sunshine-filled days, replicating a sunny, beach-friendly environment. The daylight duration decreases marginally from April, a trend that persists until June before reversing. The settled weather pattern is accompanied by a barely noticeable uptick in wind speed and atmospheric pressure.

Temperature

May brings an average high-temperature of a still tropical 30.8°C (87.4°F) in Jember, showing a slight difference from April's 30.3°C (86.5°F). During the nights in May, the temperature averages to an agreeable 22.8°C (73°F).

Heat index

The heat index value for May is estimated at a blisteringly hot 40°C (104°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In Jember, the average relative humidity in May is 80%.

Rainfall

In Jember, in May, during 20.8 rainfall days, 82mm (3.23") of precipitation is typically accumulated. Throughout the year, there are 247.8 rainfall days, and 1536mm (60.47") of precipitation is accumulated.

Daylight

In Jember, the average length of the day in May is 11h and 45min.
On the first day of May, sunrise is at 05:27 and sunset at 17:16. On the last day of the month, sunrise is at 05:32 and sunset at 17:13 WIB.

Sunshine

In May, the average sunshine in Jember is 9.1h.

UV index

February, April through December, with an average maximum UV index of 7, are months with the highest UV index in Jember. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 7 during May translates into these guidelines:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. Experience reduced UV exposure by about half when donning a wide-brim hat.