June weather forecast
Surabaya, Indonesia

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The skyscrapers making the cityscape of Surabaya in East Java, Indonesia
The skyscrapers making the cityscape of Surabaya in East Java, Indonesia

Weather in June

June extends the warmth and welcoming weather that is synonymous with Surabaya's dry season. This month offers one of the driest periods in the year, with slightly lower temperatures compared to May. Fewer rain clouds are visible as the blue and sunny skies take precedence. With calm winds and steadily reducing sea temperatures, visitors can explore water activities like sea-diving with minimized risks. Interestingly, despite June being in the midst of the year, it does not witness the maximum daylight hours.

Temperature

The arrival of June sees an average high-temperature of a still tropical 30.3°C (86.5°F), hardly diverging from May's 30.8°C (87.4°F). In June, Surabaya's temperature tends to fall to an average low of 24.9°C (76.8°F) during the night.

Heat index

Throughout June, the heat index is evaluated at a torrid 36°C (96.8°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. 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 'apparent temperature' or 'feels like', arises from combining readings of air temperature and relative moisture content. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Surabaya, the average relative humidity in June is 72%.

Rainfall

In Surabaya, Indonesia, in June, it is raining for 9.1 days, with typically 14mm (0.55") of accumulated precipitation. Throughout the year, in Surabaya, there are 187.8 rainfall days, and 839mm (33.03") of precipitation is accumulated.

Sea temperature

In Surabaya, Indonesia, the average seawater temperature in June is 29°C (84.2°F).
Note: Swimming, diving, and similar water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as very agreeable and pleasurable for lengthy periods without discomfort.

Daylight

June has the shortest days of the year, with an average of 11h and 42min of daylight.
On the first day of June, sunrise is at 05:35 and sunset at 17:18. On the last day of the month, sunrise is at 05:41 and sunset at 17:23 WIB.

Sunshine

In Surabaya, the average sunshine in June is 9.8h.

UV index

The months with the highest UV index in Surabaya, Indonesia, are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index, 7 in June, converts into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. To cut down UV radiation exposure by about half, sport a wide-brim hat. Note! Reflective surfaces like sand and water heighten the UV radiation levels.

Frequently asked questions

How hot does it get in Surabaya in June?

In June, in Surabaya, the average high-temperature is 30.3°C (86.5°F), and the average low-temperature is 24.9°C (76.8°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in June is evaluated at 36°C (96.8°F).

What is the average humidity in June in Surabaya?

In Surabaya, the average relative humidity in June is 72%.

How many days does it rain in June in Surabaya?

In June, the rain falls for 9.1 days. Throughout June, 14mm (0.55") of precipitation is accumulated.

What is the water temperature in June in Surabaya?

In Surabaya, the average seawater temperature in June is 29°C (84.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Surabaya?

The month with the shortest days in Surabaya, Indonesia, is June, with an average of 11h and 42min of daylight.

How many hours of daylight does Surabaya have in June?

The average day length in June in Surabaya is 11h and 43min.

When is the sunrise / sunset in June in Surabaya?

On the first day of June, sunrise is at 05:35 and sunset at 17:18. On the last day of the month, sunrise is at 05:41 and sunset at 17:23 WIB.

How many hours of sunshine does Surabaya have in June?

In June, the average sunshine duration in Surabaya is 9.8h.

When is the highest UV index in Surabaya?

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

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

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

How high is the UV index in June in Surabaya?

In June, the average daily maximum UV index in Surabaya, Indonesia, is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in June
Surabaya, Indonesia

Average temperature in June - Surabaya, Indonesia
  • Average high temperature in June: 30.3°C

The warmest month (with the highest average high temperature) is October (32.9°C).
The months with the lowest average high temperature are January, February and July (30.1°C).

  • Average low temperature in June: 24.9°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 (24.2°C).

Average pressure in June
Surabaya, Indonesia

Average pressure in June - Surabaya, Indonesia
  • Average pressure in June: 1010.5mbar

The month with the highest atmospheric pressure is August (1011.4mbar).
The month with the lowest atmospheric pressure is December (1008.7mbar).

Average wind speed in June
Surabaya, Indonesia

Average wind speed in June - Surabaya, Indonesia
  • Average wind speed in June: 8.1km/h

The windiest month (with the highest average wind speed) is August (9.9km/h).
The calmest month (with the lowest average wind speed) is April (6.3km/h).

Average humidity in June
Surabaya, Indonesia

Average humidity in June - Surabaya, Indonesia
  • Average humidity in June: 72%

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is October (63%).

Average rainfall in June
Surabaya, Indonesia

Average rainfall in June - Surabaya, Indonesia
  • Average rainfall in June: 14mm

The wettest month (with the highest rainfall) is February (179mm).
The driest month (with the least rainfall) is August (4mm).

Average rainfall days in June
Surabaya, Indonesia

Average rainfall days in June - Surabaya, Indonesia
  • Average rainfall days in June: 9.1 days

The month with the highest number of rainy days is January (27 days).
The month with the least rainy days is August (3.7 days).

Average sea temperature in June
Surabaya, Indonesia

Average sea temperature in June - Surabaya, Indonesia
  • Average sea temperature in June: 29°C

The best month for swimming (with the highest average sea temperature) is December (30.2°C).
The coldest month (with the lowest average sea temperature) is August (27.8°C).

Average daylight in June /
Average sunshine in June
Surabaya, Indonesia

Average daylight in June / Average sunshine in June - Surabaya, Indonesia
  • Average daylight in June: 11h and 4min

The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).

  • Average sunshine in June: 9h and 5min

The months with the most sunshine are August, September and October (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 8h and 6min).

Average sunshine days in June
Surabaya, Indonesia

Average sunshine days in June - Surabaya, Indonesia
  • Average sunshine days in June: 18.7 days

The month with the most sunshine days is August (26 days).
The month with the least sunshine days is February (2.8 days).

Average UV index in June
Surabaya, Indonesia

Average UV index in June - Surabaya, Indonesia
  • Average UV index in June: 7

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

Average cloud cover in June - Surabaya, Indonesia
  • Average cloud cover in June: 17

The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 11).

Average visibility in June
Surabaya, Indonesia

Average visibility in June - Surabaya, Indonesia
  • Average visibility in June: 10km

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).

Surabaya, Indonesia

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