June weather forecast
Negombo, Sri Lanka

June signals the commencement of the rainy season in Negombo, Sri Lanka, with more rainfall compared to May. The temperatures drop slightly, taking into account the cloud cover increase. Even though sunshine hours drop, the daylight duration remains constant, ensuring tourists and locals have adequate time for daytime activities. The rise in wind speed further soothes the warm conditions and adds charm to the city's coastal view. There is a drop in sea temperature, yet it still remains inviting for water recreation.

Temperature

Negombo notes an average high-temperature of a moderately hot 29.6°C (85.3°F) in June, displaying minor variation from May. Nights during June maintain a steady temperature, averaging at a still warm 25.9°C (78.6°F).

Heat index

For June, the heat index is computed to be a sweltering 37°C (98.6°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

The months with the highest humidity are June through August, with an average relative humidity of 82%.

Rainfall

June is the month with the most rainfall. Rain falls for 27.6 days and accumulates 231mm (9.09") of precipitation.

Sea temperature

In Negombo, in June, the average water temperature is 28.3°C (82.9°F).
Note: 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.

Daylight

With an average of 12h and 30min of daylight, June has the longest days of the year in Negombo.
On the first day of the month, sunrise is at 05:53 and sunset at 18:24. On the last day of June, in Negombo, sunrise is at 05:58 and sunset at 18:30 +0530.

Sunshine

In June, the average sunshine is 8.2h.

UV index

May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index in Negombo. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: In June, the maximum UV index of 6 transforms into these recommendations:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.