May weather forecast
Mount Lavinia, Sri Lanka

May, the last month of the spring in Mount Lavinia, is another tropical month, with temperature in the range of an average low of 26.4°C (79.5°F) and an average high of 30.3°C (86.5°F).

Temperature

A minimal variation is noted in Mount Lavinia's average high-temperature at the onset of May, reaching a still hot 30.3°C (86.5°F) from April's 31.4°C (88.5°F). Mount Lavinia notes a consistent average low-temperature of 26.4°C (79.5°F) during May nights.

Heat index

Throughout May, the heat index is appraised at a fiery hot 39°C (102.2°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. 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. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in May in Mount Lavinia, Sri Lanka, is 81%.

Rainfall

In May, in Mount Lavinia, the rain falls for 28.4 days. Throughout May, 312mm (12.28") of precipitation is accumulated. In Mount Lavinia, during the entire year, the rain falls for 285.6 days and collects up to 2201mm (86.65") of precipitation.

Daylight

The average length of the day in May in Mount Lavinia is 12h and 26min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:18. On the last day of May, in Mount Lavinia, Sri Lanka, sunrise is at 05:53 and sunset at 18:23 +0530.

Sunshine

In Mount Lavinia, Sri Lanka, the average sunshine in May is 8.6h.

UV index

May, August and October, with an average maximum UV index of 6, are months with the lowest UV index in Mount Lavinia. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In May, an average UV index of 6 transforms into the following instructions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.