May weather forecast
Hanwella, Sri Lanka

May, the last month of the spring in Hanwella, is another hot month, with an average temperature fluctuating between 26.3°C (79.3°F) and 30.6°C (87.1°F).

Temperature

Hanwella, Sri Lanka, starts May with an average high-temperature of a still hot 30.6°C (87.1°F), hinting at a minimal fluctuation from April. Nights in May in Hanwella, Sri Lanka, exhibit a minor reduction to an average low temperature of 26.3°C (79.3°F).

Heat index

For most parts of May, the heat index is calculated to be a blistering 40°C (104°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. 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 'feels like' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

The average relative humidity in May is 81%.

Rainfall

In May, the rain falls for 28.8 days. Throughout May, 306mm (12.05") of precipitation is accumulated. Throughout the year, in Hanwella, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.

Daylight

In Hanwella, Sri Lanka, the average length of the day in May is 12h and 26min.
On the first day of May, sunrise is at 05:55 and sunset at 18:17. On the last day of the month, sunrise is at 05:52 and sunset at 18:22 +0530.

Sunshine

The average sunshine in May in Hanwella, Sri Lanka, is 8.6h.

UV index

The months with the lowest UV index in Hanwella 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 daily UV index of 6 turns into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.