May weather forecast
Sirimalwatta, Sri Lanka

May, the last month of the spring in Sirimalwatta, is also a hot month, with temperature in the range of an average high of 30.1°C (86.2°F) and an average low of 21.8°C (71.2°F).

Temperature

As May takes its course, Sirimalwatta's average high-temperature registers at a still hot 30.1°C (86.2°F), closely aligning with the preceding month. Sirimalwatta experiences an average low-temperature reading of 21.8°C (71.2°F) throughout May.

Heat index

The heat index value for May is evaluated at a torrid 38°C (100.4°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. 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. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In May, the average relative humidity in Sirimalwatta, Sri Lanka, is 80%.

Rainfall

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

Daylight

In May, the average length of the day 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, in Sirimalwatta, sunrise is at 05:49 and sunset at 18:20 +0530.

Sunshine

The average sunshine in May in Sirimalwatta, Sri Lanka, is 10.4h.

UV index

The months with the highest UV index in Sirimalwatta are January through September, November and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In May, a daily UV index of 6 turns into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.