May weather forecast
Vallam, India

The last month of the pre-monsoon summer, May, is another very hot month in Vallam, India, with an average temperature ranging between min 28.8°C (83.8°F) and max 38.6°C (101.5°F).

Temperature

In Vallam, May is the month with the highest recorded average temperatures, measuring a high of 38.6°C (101.5°F) and a low of 28.8°C (83.8°F).

Heat index

The average heat index in May is calculated to be a blazing hot 53°C (127.4°F). Be alert: Heat exhaustion along with heat cramps are probable. Heatstroke is a threat with sustained physical activity.
Note that heat index values are valued for light wind and location in the shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In May, the average relative humidity is 54%.

Rainfall

In Vallam, in May, it is raining for 13.8 days, with typically 35mm (1.38") of accumulated precipitation. In Vallam, during the entire year, the rain falls for 145 days and collects up to 512mm (20.16") of precipitation.

Daylight

The average length of the day in May is 12h and 37min.
On the first day of May, sunrise is at 5:55 am and sunset at 6:26 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 6:32 pm IST.

Sunshine

May has the most sunshine of the year, with an average of 11.7h of sunshine.

UV index

The months with the highest UV index are March through August, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 8 in May translates into the following instructions:
Without proper safety measures, skin and eyes can be quickly harmed. Be sure to protect yourself. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.