June weather forecast
Slave Island, Sri Lanka

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Weather in June

The first month of the summer, June, is still a warm month in Slave Island, Sri Lanka, with an average temperature ranging between max 29.3°C (84.7°F) and min 25.8°C (78.4°F).

Temperature

In June, Slave Island experiences a minor shift in meteorological conditions with average high-temperatures marked at a warm 29.3°C (84.7°F), closely mirroring the climate in May. Slave Island's nighttime temperatures in June settle close to daytime highs at an average of 25.8°C (78.4°F).

Heat index

June's average heat index is appraised at a fiery hot 36°C (96.8°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Heat index determinations are made taking into account the shade and light air movements. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', offers an insight into how hot it feels when we factor in moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. 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

June through August, with an average relative humidity of 83%, are the most humid months.

Rainfall

June is the month with the most rainfall. Rain falls for 29.3 days and accumulates 341mm (13.43") of precipitation.

Daylight

June has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of June, sunrise is at 05:53 and sunset at 18:23. On the last day of the month, sunrise is at 05:58 and sunset at 18:29 +0530.

Sunshine

In June, the average sunshine is 8h.

UV index

The months with the lowest UV index in Slave Island are May, June, August and October, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: An average UV index of 6 in June transforms into this advice:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
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Frequently asked questions

How hot is it in Slave Island in June?

June temperatures in Slave Island, Sri Lanka, vary between a high-temperature of 29.3°C (84.7°F) and a low-temperature of 25.8°C (78.4°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in June is appraised at 36°C (96.8°F).

What is the most humid month in Slave Island?

The months with the highest humidity are June through August, with an average relative humidity of 83%.

What is the average humidity in June in Slave Island?

The average relative humidity in June is 83%.

What is the rainiest month in Slave Island?

June is the month with the most rainfall in Slave Island. Rain falls for 29.3 days and accumulates 341mm (13.43") of precipitation.

How much does it rain in Slave Island in June?

In Slave Island, Sri Lanka, in June, during 29.3 rainfall days, 341mm (13.43") of precipitation is typically accumulated.

When are the longest days in Slave Island?

June has the longest days of the year in Slave Island, with an average of 12h and 30min of daylight.

How many hours of daylight does Slave Island have in June?

The average day length in June is 12h and 31min.

What time are sunrise and sunset in June in Slave Island?

In June, on the first day of the month, sunrise is at 05:53 and sunset at 18:23. On the last day of the month, in Slave Island, sunrise is at 05:58 and sunset at 18:29 +0530.

How many hours of sunshine does Slave Island have in June?

The average sunshine duration in June in Slave Island, Sri Lanka, is 8h.

What is the month with the lowest UV index in Slave Island?

The months with the lowest UV index in Slave Island are May, June, August and October, with an average maximum UV index of 6.

What is the UV index intensity in June in Slave Island?

The average daily maximum UV index in June is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in June
Slave Island, Sri Lanka

Average temperature in June - Slave Island, Sri Lanka
  • Average high temperature in June: 29.3°C

The warmest months (with the highest average high temperature) are March and April (31.8°C).
The months with the lowest average high temperature are July and August (28.9°C).

  • Average low temperature in June: 25.8°C

The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.1°C).

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Average pressure in June
Slave Island, Sri Lanka

Average pressure in June - Slave Island, Sri Lanka
  • Average pressure in June: 1008.7mbar

The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).

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Average wind speed in June
Slave Island, Sri Lanka

Average wind speed in June - Slave Island, Sri Lanka
  • Average wind speed in June: 15.1km/h

The windiest month (with the highest average wind speed) is June (15.1km/h).
The calmest month (with the lowest average wind speed) is March (8km/h).

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Average humidity in June
Slave Island, Sri Lanka

Average humidity in June - Slave Island, Sri Lanka
  • Average humidity in June: 83%

The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (74%).

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Average rainfall in June
Slave Island, Sri Lanka

Average rainfall in June - Slave Island, Sri Lanka
  • Average rainfall in June: 341mm

The wettest month (with the highest rainfall) is June (341mm).
The driest month (with the least rainfall) is January (40mm).

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Average rainfall days in June
Slave Island, Sri Lanka

Average rainfall days in June - Slave Island, Sri Lanka
  • Average rainfall days in June: 29.3 days

The month with the highest number of rainy days is August (30.2 days).
The month with the least rainy days is January (11.6 days).

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Average daylight in June /
Average sunshine in June
Slave Island, Sri Lanka

Average daylight in June / Average sunshine in June - Slave Island, Sri Lanka
  • Average daylight in June: 12h and 3min

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

  • Average sunshine in June: 8h and 0min

The month with the most sunshine is January (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).

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Average sunshine days in June
Slave Island, Sri Lanka

Average sunshine days in June - Slave Island, Sri Lanka
  • Average sunshine days in June: 0.3 days

The month with the most sunshine days is January (17.2 days).
The months with the least sunshine days are June and August (0.3 days).

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Average UV index in June
Slave Island, Sri Lanka

Average UV index in June - Slave Island, Sri Lanka
  • Average UV index in June: 6

The months with the highest UV index are January, February, March, April, July, September, November and December (UV index 7).
The months with the lowest UV index are May, June, August and October (UV index 6).

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Average cloud cover in June
Slave Island, Sri Lanka

Average cloud cover in June - Slave Island, Sri Lanka
  • Average cloud cover in June: 57

The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 24).

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Average visibility in June
Slave Island, Sri Lanka

Average visibility in June - Slave Island, Sri Lanka
  • Average visibility in June: 9km

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

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Slave Island, Sri Lanka

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