June weather forecast and climate
Colombo, Sri Lanka

Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake
Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake

Weather in June

June, the first month of the summer, in Colombo, is also a moderately hot month, with average temperature fluctuating between 29.3°C (84.7°F) and 25.8°C (78.4°F).

Temperature

In Colombo, Sri Lanka, the average high-temperature is relatively the same as in May - a moderately hot 29.3°C (84.7°F). The average low-temperature, in June, is 25.8°C (78.4°F).

Heat index

In June, the average heat index is calculated to be a sweltering 36.3°C (97.3°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'real feel', 'apparent temperature', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like metabolic differences, clothing, differences in body mass, height, and shape, and activity influence one's weather impression. 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 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. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing 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

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

Rainfall

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

Sea temperature

In Colombo, Sri Lanka, the average seawater temperature is 28.2°C (82.8°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

Months with the longest days in Colombo are June and July, with an average of 12.5h of daylight.

Sunshine

In Colombo, the average sunshine in June is 8h.

UV index

May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index in Colombo, Sri Lanka. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for the average person.
Note: In June, the average maximum UV index of 6 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in June in Colombo?

In June, in Colombo, the average high-temperature is 29.3°C (84.7°F), and the average low-temperature is 25.8°C (78.4°F). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in June is calculated to be 36.3°C (97.3°F).

What are the most humid months in Colombo?

Months with the highest humidity in Colombo, Sri Lanka, are June through August, with an average relative humidity of 83%.

What is the average humidity in June in Colombo?

The average relative humidity in June is 83%.

What is the rainiest month in Colombo?

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

How many days does it rain in June in Colombo?

In Colombo, in June, it is raining for 29.3 days, with typically 341mm (13.43") of accumulated precipitation.

What is the water temperature in June in Colombo?

In Colombo, Sri Lanka, the average seawater temperature in June is 28.2°C (82.8°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

When are the longest days in Colombo?

June and July, with an average of 12.5h of daylight, are months with the longest days.

What is the average length of the day in June in Colombo?

In June, the average length of the day is 12.5h.

How long on average sun shines in June in Colombo?

The average sunshine in June in Colombo, Sri Lanka, is 8h.

When is the lowest UV index in Colombo?

May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index in Colombo, Sri Lanka.

What is the UV index intensity in June in Colombo?

The average daily maximum UV index in June in Colombo is 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to the Sun's UV rays.

Average temperature in June
Colombo, Sri Lanka

Average temperature in June - Colombo, 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).
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
Colombo, Sri Lanka

Average pressure in June - Colombo, 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
Colombo, Sri Lanka

Average wind speed in June - Colombo, 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
Colombo, Sri Lanka

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

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

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Average rainfall in June
Colombo, Sri Lanka

Average rainfall in June - Colombo, 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
Colombo, Sri Lanka

Average rainfall days in June - Colombo, 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 sea temperature in June
Colombo, Sri Lanka

Average sea temperature in June - Colombo, Sri Lanka
  • Average sea temperature in June: 28.2°C

The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27.2°C).

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Average daylight in June /
Average sunshine in June
Colombo, Sri Lanka

Average daylight in June / Average sunshine in June - Colombo, Sri Lanka
  • Average daylight in June: 12.5h

Months with the longest days are June and July (Average daylight: 12.5h).
The month with the shortest days is December (Average daylight: 11.7h).

  • Average sunshine in June: 8h

The month with the most sunshine is January (Average sunshine: 9.1h).
The month with the least sunshine is November (Average sunshine: 6.7h).

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Average sunshine days in June
Colombo, Sri Lanka

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

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

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Average UV index in June
Colombo, Sri Lanka

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

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

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Average cloud cover in June
Colombo, Sri Lanka

Average cloud cover in June - Colombo, 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
Colombo, Sri Lanka

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

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

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