May weather forecast
Teldeniya, Sri Lanka

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

Temperature

May's commencement is accompanied by an average high-temperature of a still tropical 30.1°C (86.2°F), diverging marginally from April's 31.2°C (88.2°F). May is noted for a mean low-temperature of 21.8°C (71.2°F).

Heat index

The heat index for May is evaluated at a sweltering 38°C (100.4°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in May in Teldeniya is 80%.

Rainfall

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

Daylight

The average length of the day in May is 12h and 28min.
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

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In May, the maximum UV index of 6 transforms into these recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. 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.