May weather forecast
Periyamulla, Sri Lanka

May, the last month of the spring in Periyamulla, is another tropical month, with an average temperature varying between 30.8°C (87.4°F) and 26.4°C (79.5°F).

Temperature

The advent of May brings an average high-temperature of a still tropical 30.8°C (87.4°F), exhibiting minor difference from the previous month. May nights in Periyamulla witness a slight temperature decrease, averaging at a warm 26.4°C (79.5°F).

Heat index

For most parts of May, the heat index is estimated at a blistering 40°C (104°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In Periyamulla, the average relative humidity in May is 80%.

Rainfall

In May, the rain falls for 26.3 days. Throughout May, 204mm (8.03") of precipitation is accumulated. Throughout the year, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.

Daylight

In Periyamulla, the average length of the day in May is 12h and 27min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:19. On the last day of May, in Periyamulla, sunrise is at 05:52 and sunset at 18:23 +0530.

Sunshine

In Periyamulla, the average sunshine in May is 8.8h.

UV index

The months with the lowest UV index in Periyamulla, Sri Lanka, 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 unprotected exposure to Sun's UV rays for the ordinary person.
Note: In May, a regular UV index of 6 translates into these guidelines:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.