May weather forecast
Vallipuram, Sri Lanka

May, the last month of the spring in Vallipuram, is another tropical month, with an average temperature ranging between max 30.7°C (87.3°F) and min 29°C (84.2°F).

Temperature

Vallipuram registers the highest average temperatures during the month of May, with peaks of 30.7°C (87.3°F) and lows of 29°C (84.2°F).

Heat index

Throughout May, the heat index is appraised at a blisteringly hot 40°C (104°F). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly relevant to children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. 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. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

May and September, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Vallipuram, in May, it is raining for 10.3 days, with typically 48mm (1.89") of accumulated precipitation. Throughout the year, in Vallipuram, there are 189.6 rainfall days, and 1106mm (43.54") of precipitation is accumulated.

Daylight

In May, the average length of the day is 12h and 34min.
On the first day of May, sunrise is at 05:51 and sunset at 18:20. On the last day of the month, sunrise is at 05:47 and sunset at 18:26 +0530.

Sunshine

The months with the most sunshine are May and June, with an average of 11.6h of sunshine.

UV index

January through September and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: In May, a regular UV index of 7 translates into these guidelines:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.