May weather forecast
Galaha, Sri Lanka

The last month of the spring, May, is also a hot month in Galaha, Sri Lanka, with an average temperature fluctuating between 21.8°C (71.2°F) and 30.1°C (86.2°F).

Temperature

With the advent of May, Galaha's high-temperatures adjust to a still hot 30.1°C (86.2°F), closely aligning with the preceding month. Galaha's temperature drops to an average low of 21.8°C (71.2°F) during the nights of May.

Heat index

The average heat index in May is calculated to be a very hot 38°C (100.4°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

The average relative humidity in May is 80%.

Rainfall

In Galaha, Sri Lanka, during May, the rain falls for 28.6 days and regularly aggregates up to 163mm (6.42") of precipitation. In Galaha, during the entire year, the rain falls for 278.4 days and collects up to 1466mm (57.72") of precipitation.

Daylight

In May, the average length of the day is 12h and 27min.
On the first day of the month, sunrise is at 05:52 and sunset at 18:15. On the last day of May, sunrise is at 05:49 and sunset at 18:20 +0530.

Sunshine

The average sunshine in May is 10.4h.

UV index

January through September, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the average person.
Note: The UV index of 6 during May translates into the following guidance:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.