June weather forecast
Gampaha, Sri Lanka

In June, Gampaha is in the grip of a full-blown monsoon. A minor increase in maximum and minimum temperatures compensates for the heightened rainfall, which peaks at 231mm (9.09"). Thick cloud coverage becomes more prominent, and the relative humidity surges to 82%, heightening the sensation of a wet, tropical climate. Winds start to intensify providing a welcome relief from the high temperatures and humidity. Despite the heavy rains, Gampaha thrives under the nourishing rainfall, its natural landscape flourishing more than ever.

Temperature

June's average high-temperature in Gampaha stands at a warm 29.6°C (85.3°F), showing little deviation from May's 30.8°C (87.4°F). Gampaha's nighttime temperatures in June see a subtle dip to an average of 25.9°C (78.6°F).

Heat index

In June, the heat index is appraised at a fiery hot 37°C (98.6°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

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

Daylight

With an average of 12h and 30min of daylight, June has the longest days of the year in Gampaha.
On the first day of June in Gampaha, sunrise is at 05:52 and sunset at 18:23. On the last day of the month, sunrise is at 05:57 and sunset at 18:29 +0530.

Sunshine

In Gampaha, the average sunshine in June 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 Gampaha. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 6 during June translates into these guidelines:
Take precautions against overexposure. Protection against sun damage is needed. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.