May weather forecastOkanda, Sri Lanka

Weather in May

The last month of the spring, May, is another hot month in Okanda, Sri Lanka, with temperature in the range of an average high of 30.8°C (87.4°F) and an average low of 26.7°C (80.1°F).

Temperature

Okanda experiences a subtle adjustment in high-temperatures to a still tropical 30.8°C (87.4°F) with the onset of May, maintaining near parity with April's 31.1°C (88°F). During the month of May, Okanda identifies an average nighttime low-temperature of 26.7°C (80.1°F), slightly lower than its daytime counterpart.

Heat index

In May, the heat index is calculated to be a sweltering 39°C (102.2°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

The average relative humidity in May in Okanda is 77%.

Rainfall

In Okanda, during May, the rain falls for 17.8 days and regularly aggregates up to 72mm (2.83") of precipitation. Throughout the year, there are 192.9 rainfall days, and 942mm (37.09") of precipitation is accumulated.

Daylight

In May, the average length of the day is 12h and 26min.
On the first day of May, sunrise is at 05:49 and sunset at 18:10. On the last day of the month, sunrise is at 05:46 and sunset at 18:15 +0530.

Sunshine

In Okanda, the average sunshine in May is 10.9h.

UV index

January through September, November and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum UV index, 7 during May, leads to the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.