May weather forecast
Jakarta, Indonesia

The last month of the autumn, May, is another hot month in Jakarta, Indonesia, with temperature in the range of an average low of 26.1°C (79°F) and an average high of 31.2°C (88.2°F).

Temperature

In Jakarta, Indonesia, the average high-temperature in May is almost the same as in April - a still hot 31.2°C (88.2°F). In May, in Jakarta, the average low-temperature is 26.1°C (79°F).

Heat index

In May, the average heat index is appraised at a sweltering 39°C (102.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, clothing, wind). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In May, the average relative humidity is 72%.

Rainfall

In Jakarta, during 22.5 rainfall days, 98mm (3.86") of precipitation is typically accumulated. In Jakarta, during the entire year, the rain falls for 252 days and collects up to 1150mm (45.28") of precipitation.

Sea temperature

April and May, with an average sea temperature of 30°C (86°F), are months with the warmest seawater.
Note: The water temperature above 30°C (86°F) is arguably regarded as unpleasant. The primary purpose of entering the water - cooling down from sunshine and high temperatures - is lost.

Daylight

In May, the average length of the day is 11h and 50min.
On the first day of the month, sunrise is at 05:52 and sunset at 17:46. On the last day of May, sunrise is at 05:56 and sunset at 17:43 WIB.

Sunshine

In May, the average sunshine is 9.3h.

UV index

The months with the highest UV index in Jakarta are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Jakarta are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned 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. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.