June weather forecast
Polonnaruwa, Sri Lanka

In June, Polonnaruwa welcomes dominantly dry weather. Both temperature and precipitation remain fairly low, marking a contrast to the heavier rainfall seen in May. With an average rainfall of just 15mm (0.59") over nearly eight days, June is identified as the driest month of the year in Polonnaruwa.

Temperature

June's arrival in Polonnaruwa brings an average high-temperature of a still hot 33.6°C (92.5°F), slightly deviating from May's 34.2°C (93.6°F). Polonnaruwa's temperature lowers to a mean of 24.8°C (76.6°F) during the nights in June.

Heat index

The heat index value during June is computed to be a scorching 44°C (111.2°F). Take heed: Heat exhaustion and heat cramps are anticipated. Heatstroke is a potential outcome of continuous activity.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. 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 are highly critical to babies and toddlers. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

The months with the lowest humidity are June through September, with an average relative humidity of 67%.

Rainfall

June is the month with the least rainfall. Rain falls for 7.8 days and accumulates 15mm (0.59") of precipitation.

Daylight

With an average of 12h and 36min of daylight, June has the longest days of the year in Polonnaruwa.
On the first day of June in Polonnaruwa, sunrise is at 05:47 and sunset at 18:20. On the last day of the month, sunrise is at 05:52 and sunset at 18:27 +0530.

Sunshine

The month with the most sunshine in Polonnaruwa is June, with an average of 11.3h of sunshine.

UV index

February through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 7 during June leads to these instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.