June weather forecast
Katuwapitiya, Sri Lanka

June, the first month of the summer in Katuwapitiya, is still a warm month, with an average temperature varying between 25.9°C (78.6°F) and 29.6°C (85.3°F).

Temperature

The ushering in of June brings an average high-temperature of a warm 29.6°C (85.3°F), closely mirroring the 30.8°C (87.4°F) of May. During the nights of June, Katuwapitiya maintains an almost steady temperature with an average low of 25.9°C (78.6°F).

Heat index

The heat index for June is appraised at a very hot 37°C (98.6°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

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

Rainfall

The month with the most rainfall in Katuwapitiya is June, when the rain falls for 27.6 days and typically aggregates up to 231mm (9.09") of precipitation.

Daylight

June has the longest days of the year in Katuwapitiya, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 05:52 and sunset at 18:23. On the last day of June, sunrise is at 05:58 and sunset at 18:30 +0530.

Sunshine

The average sunshine in June is 8.2h.

UV index

The months with the lowest UV index in Katuwapitiya are May, June, August and October, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In June, a daily maximum UV index of 6 leads to the following instructions:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.