April weather forecast
Jakarta, Indonesia

The cityscape of Jakarta, Indonesia, under a dramatic evening skyline
The cityscape of Jakarta, Indonesia, under a dramatic evening skyline

Weather in April

April, like March, is another tropical autumn month in Jakarta, Indonesia, with average temperature varying between 25.9°C (78.6°F) and 30.9°C (87.6°F).

Temperature

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

Heat index

In April, the average heat index is calculated to be a torrid 38.6°C (101.5°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, pregnancy). 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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 Jakarta, the average relative humidity is 74%.

Rainfall

In Jakarta, Indonesia,, during 24.8 rainfall days, 141mm (5.55") of precipitation is typically accumulated. Throughout the year, in Jakarta, 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 in Jakarta.
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 Jakarta, Indonesia, the average length of the day in April is 12h.

Sunshine

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 in Jakarta. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to the UV radiation for the average person.
Note: In April, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. 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 reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in April in Jakarta?

The average high-temperature, in April, in Jakarta, 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. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 38.6°C (101.5°F).

What is the average humidity in April in Jakarta?

In Jakarta, the average relative humidity in April is 74%.

How many days does it rain in April in Jakarta?

In Jakarta, Indonesia, during April, the rain falls for 24.8 days and regularly aggregates up to 141mm (5.55") of precipitation.

When is the sea warmest in Jakarta?

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

What is the sea temperature in April in Jakarta?

In Jakarta, Indonesia, in April, the average water temperature 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 Jakarta, Indonesia, the average length of the day in April is 12h.

How long on average sun shines in April in Jakarta?

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

When is the highest UV index in Jakarta?

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

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

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

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 hazard to health from the exposure to the Sun's UV rays.

Average temperature in April
Jakarta, Indonesia

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).

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Average pressure in April
Jakarta, Indonesia

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).

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Average wind speed in April
Jakarta, Indonesia

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).

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Average humidity in April
Jakarta, Indonesia

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%).

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Average rainfall in April
Jakarta, Indonesia

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).

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Average rainfall days in April
Jakarta, Indonesia

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).

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Average sea temperature in April
Jakarta, Indonesia

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).

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Average daylight in April /
Average sunshine in April
Jakarta, Indonesia

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).

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Average sunshine days in April
Jakarta, Indonesia

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).

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Average UV index in April
Jakarta, Indonesia

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).

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Average cloud cover in April
Jakarta, Indonesia

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).

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Average visibility in April
Jakarta, Indonesia

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).

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