June weather forecast
Colombo, Sri Lanka

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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

The month of June sees rainfall levels stay above average, as 341mm (13.43") precipitation is recorded throughout the month in Colombo. Outdoor activities can still be enjoyed with over 12.5 hours of daylight, the highest for the year. Spectacular view of the cloud formations at 57% cloud cover is a treat for sky-gazers. Sea temperatures start decreasing, signaling the end of the swimming season. However, the very calm wind conditions may not be ideal for water sport enthusiasts.

Temperature

As Colombo welcomes June, the average high-temperature stabilizes at a warm 29.3°C (84.7°F), showing little deviation from May's 30.6°C (87.1°F). Colombo maintains a consistent average nighttime low-temperature of 25.8°C (78.4°F) throughout June.

Heat index

For June, the heat index is computed to be a fiery hot 36°C (96.8°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant 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. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

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 in Colombo, Sri Lanka. Rain falls for 29.3 days and accumulates 341mm (13.43") of precipitation.

Sea temperature

In June, the average sea temperature in Colombo is 28.2°C (82.8°F).
Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as excellent and extremely agreeable for enduring enjoyment in water activities.

Daylight

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

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. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In June, a daily maximum UV index of 6 leads to the following instructions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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Frequently asked questions

How hot is June in Colombo?

The high-temperature, in June, in Colombo, records 29.3°C (84.7°F), while the low-temperature is 25.8°C (78.4°F). In June, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is computed to be 36°C (96.8°F).

What is the most humid month in Colombo?

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

What is the average humidity in June in Colombo?

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 June, the rain falls for 29.3 days. Throughout June, 341mm (13.43") of precipitation is accumulated.

What is the sea water temperature in June in Colombo?

In Colombo, the average seawater temperature in June is 28.2°C (82.8°F). 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.

When are the longest days in Colombo?

The month with the longest days in Colombo, Sri Lanka, is June, with an average of 12h and 30min of daylight.

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

In June, the average day length in Colombo is 12h and 31min.

When are sunrise and sunset in June in Colombo?

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, sunrise is at 05:58 and sunset at 18:29 +0530.

How many hours of sunshine does Colombo have in June?

In Colombo, the average sunshine duration in June 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.

What is the UV index reading in June in Colombo?

The average daily maximum UV index in June in Colombo is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.

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).
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
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%

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
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: 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
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).
The 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

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
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

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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Colombo, Sri Lanka

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