April weather forecast and climate
Jakarta, Indonesia

The cityscape of Jakarta, Indonesia, under a dramatic evening skyline
The cityscape of Jakarta, Indonesia, under a dramatic evening skyline
April, the same as March, in Jakarta, Indonesia, is another hot autumn month, with average temperature varying between 30.9°C (87.6°F) and 25.9°C (78.6°F).

Temperature

In Jakarta, the average high-temperature is practically the same as in March - a still hot 30.9°C (87.6°F). In Jakarta, the average low-temperature is 25.9°C (78.6°F).

Heat index

The average heat index in April is appraised at a very hot 38.6°C (101.5°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. 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 a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, clothing, metabolic differences, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In April, the average relative humidity is 74%.

Rainfall

In Jakarta, in April, it is raining for 24.8 days, with typically 141mm (5.55") of accumulated precipitation. Throughout the year, there are 252 rainfall days, and 1150mm (45.28") of precipitation is accumulated.

Sea temperature

April and May, with an average sea temperature of 30°C (86°F), are months with the warmest seawater.
Note: For swimming, other intense water activities, temperature above 30°C (86°F) is arguably unpleasant, as the water cooling effect is missing.

Daylight

The average length of the day is 12h.

Sunshine

In Jakarta, the average sunshine is 8.9h.

UV index

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 of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 7 in April interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in April in Jakarta?

The average high-temperature, in April, in Jakarta, Indonesia, is 30.9°C (87.6°F), while the average low-temperature is 25.9°C (78.6°F). In April, the average heat index (a.k.a. 'real feel', 'felt air temperature'), that combines air temperature and relative humidity, is appraised at 38.6°C (101.5°F).

What is the average humidity in April in Jakarta?

The average relative humidity in April in Jakarta, Indonesia, is 74%.

How many days does it rain in April in Jakarta?

In April, in Jakarta, Indonesia, the rain falls for 24.8 days. Throughout April, 141mm (5.55") of precipitation is accumulated.

What months are the sea warmest in Jakarta?

April and May, with an average sea temperature of 30°C (86°F), are months with the warmest seawater in Jakarta.

What is the sea water temperature in April in Jakarta?

In Jakarta, Indonesia, the average seawater temperature in April is 30°C (86°F). The surface water temperatures above 30°C (86°F) are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

What is the average length of the day in April in Jakarta?

In April, the average length of the day is 12h.

How long on average sun shines in April in Jakarta?

In Jakarta, Indonesia, the average sunshine in April is 8.9h.

What are the months with the highest UV index in Jakarta?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Jakarta.

When is the lowest UV index in Jakarta?

Months with the lowest UV index in Jakarta are January through December, with an average maximum UV index of 7.

How high is the UV index in April in Jakarta?

In April, the average daily maximum UV index in Jakarta is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in April - Jakarta, Indonesia
  • Average high temperature in April: 30.9°C

The warmest month (with the highest average high temperature) is October (31.8°C).
Months with the lowest average high temperature are January and February (29.8°C).

  • Average low temperature in April: 25.9°C

The month with the highest average low temperature is November (26.5°C).
The coldest month (with the lowest average low temperature) is August (24.7°C).

Average pressure in April - Jakarta, Indonesia
  • Average pressure in April: 1009.8mbar

The month with the highest atmospheric pressure is September (1011.1mbar).
The month with the lowest atmospheric pressure is December (1009.2mbar).

Average wind speed in April - Jakarta, Indonesia
  • Average wind speed in April: 8.6km/h

The windiest month (with the highest average wind speed) is January (12.4km/h).
The calmest month (with the lowest average wind speed) is November (8.1km/h).

Average humidity in April - Jakarta, Indonesia
  • Average humidity in April: 74%

The month with the highest relative humidity is February (76%).
The month with the lowest relative humidity is October (67%).

Average rainfall in April - Jakarta, Indonesia
  • Average rainfall in April: 141mm

The wettest month (with the highest rainfall) is March (144mm).
The driest month (with the least rainfall) is August (35mm).

Average rainfall days in April - Jakarta, Indonesia
  • Average rainfall days in April: 24.8 days

The month with the highest number of rainy days is March (26.1 days).
The month with the least rainy days is August (11.6 days).

Average sea temperature in April - Jakarta, Indonesia
  • Average sea temperature in April: 30°C

The best months for swimming (with the highest average sea temperature) are April and May (30°C).
The coldest months (with the lowest average sea temperature) are January and February (28°C).

Average daylight in April / Average sunshine in April - Jakarta, Indonesia
  • Average daylight in April: 12h

The month with the longest days is December (Average daylight: 12.5h).
Months with the shortest days are May, June and July (Average daylight: 11.8h).

  • Average sunshine in April: 8.9h

The month with the most sunshine is March (Average sunshine: 10.2h).
The month with the least sunshine is July (Average sunshine: 7.3h).

Average sunshine days in April - Jakarta, Indonesia
  • Average sunshine days in April: 4.3 days

The month with the most sunshine days is August (16 days).
The month with the least sunshine days is February (2.6 days).

Average UV index in April - Jakarta, Indonesia
  • Average UV index in April: 7

Months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average cloud cover in April - Jakarta, Indonesia
  • Average cloud cover in April: 37

The month with the most cloud cover is January (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 21).

Average visibility in April - Jakarta, Indonesia
  • Average visibility in April: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).