May weather forecast
Lewella, Sri Lanka

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

Temperature

At the start of May, Lewella's average high-temperature reaches a still hot 30.1°C (86.2°F), subtly different from the preceding month. An average low-temperature of 21.8°C (71.2°F) is noted during the nights in May.

Heat index

For May, the heat index is estimated at a torrid 38°C (100.4°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

The average relative humidity in May is 80%.

Rainfall

In Lewella, in May, it is raining for 28.6 days, with typically 163mm (6.42") of accumulated precipitation. Throughout the year, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.

Daylight

In Lewella, Sri Lanka, the average length of the day in May is 12h and 28min.
On the first day of May, sunrise is at 05:52 and sunset at 18:16. On the last day of the month, sunrise is at 05:49 and sunset at 18:20 +0530.

Sunshine

In Lewella, 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 reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 6 in May, converts into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days.