May weather forecast
Dediyawala, Sri Lanka

The last month of the spring, May, is another hot month in Dediyawala, Sri Lanka, with an average temperature ranging between max 30.2°C (86.4°F) and min 26.3°C (79.3°F).

Temperature

May welcomes an average high-temperature of a still tropical 30.2°C (86.4°F), not much different from the preceding month. The month of May in Dediyawala is marked by an average minimum temperature of 26.3°C (79.3°F), slightly cooler than its daytime counterpart.

Heat index

For most parts of May, the heat index is computed to be a torrid 39°C (102.2°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', quantifies the warmth felt when relative humidity is considered. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In Dediyawala, the average relative humidity in May is 81%.

Rainfall

In Dediyawala, in May, during 28 rainfall days, 303mm (11.93") of precipitation is typically accumulated. In Dediyawala, during the entire year, the rain falls for 273.8 days and collects up to 2059mm (81.06") of precipitation.

Daylight

The average length of the day in May in Dediyawala is 12h and 25min.
On the first day of May in Dediyawala, sunrise is at 05:56 and sunset at 18:18. On the last day of the month, sunrise is at 05:53 and sunset at 18:22 +0530.

Sunshine

The average sunshine in May in Dediyawala is 8.7h.

UV index

The months with the lowest UV index are May, June and August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 6 in May translates into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.