May weather forecast
Naranwala, Sri Lanka

The last month of the spring, May, is another hot month in Naranwala, Sri Lanka, with an average temperature varying between 26.3°C (79.3°F) and 30.6°C (87.1°F).

Temperature

In May, Naranwala experiences a minor shift in meteorological conditions with average high-temperatures marked at a still tropical 30.6°C (87.1°F), closely mirroring the climate in April. Naranwala registers a small shift from peak daytime temperatures, with a consistent average low-temperature of 26.3°C (79.3°F) during May.

Heat index

The heat index value for May is computed to be a scorching 40°C (104°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In May, the average relative humidity is 81%.

Rainfall

In Naranwala, during May, the rain falls for 28.8 days and regularly aggregates up to 306mm (12.05") of precipitation. In Naranwala, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In May, the average length of the day is 12h and 26min.
On the first day of May, sunrise is at 05:55 and sunset at 18:18. On the last day of the month, sunrise is at 05:52 and sunset at 18:22 +0530.

Sunshine

In Naranwala, the average sunshine in May is 8.6h.

UV index

May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index, 6 during May, leads to the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.