June weather forecast
Dehiwala, Sri Lanka

June in Dehiwala denotes abundant rainfall and high humidity whilst maintaining moderately warm temperatures. As compared to May, June witnesses only slight variations in weather with a minor dip in rainfall. Having crossed the halfway mark of the year, June features the second highest rainfall measuring 315mm (12.4"). As June draws to a closure, residents can anticipate a downward trend in rainfall coupled with a slight decrease in maximum temperature in July.

Temperature

The initiation of June sees an average high-temperature of a moderately hot 29.1°C (84.4°F), showing minor variations from the previous month. Dehiwala sees a gentle drop from the daily peak temperature in June, with an average low settling at 26.1°C (79°F).

Heat index

For June, the heat index is estimated at a fiery hot 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
The heat index's values are generally associated with conditions in shade and light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

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

Rainfall

The month with the most rainfall in Dehiwala is June, when the rain falls for 28.6 days and typically aggregates up to 315mm (12.4") of precipitation.

Sea temperature

In June, the average sea temperature in Dehiwala is 28.2°C (82.8°F).
Note: Water temperatures from 25°C (77°F) to 29°C (84.2°F) make swimming, diving, and similar activities highly pleasurable and enjoyable for long periods without discomfort.

Daylight

June has the longest days of the year in Dehiwala, 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 Dehiwala, the average sunshine in June is 8.3h.

UV index

The months with the highest UV index are January through April, June, July, September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 7 in June translates into these instructions:
Deter overexposure. Protecting against the sun's effects is essential. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Warning! Sand and water reflections boost the intensity of UV exposure.