May weather forecastMawanella, Sri Lanka
May
Weather in May
The last month of the spring, May, is another hot month in Mawanella, Sri Lanka, with an average temperature varying between 21.8°C (71.2°F) and 30.1°C (86.2°F).Temperature
May brings an average high-temperature of a still tropical 30.1°C (86.2°F), nearly identical to the preceding month. In May, Mawanella reports a consistent average low-temperature of 21.8°C (71.2°F) during the nights.Heat index
The heat index for May is appraised at a sweltering 38°C (100.4°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.
Humidity
In May, the average relative humidity is 80%.Rainfall
In Mawanella, during May, the rain falls for 28.6 days and regularly aggregates up to 163mm (6.42") of precipitation. In Mawanella, 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 in Mawanella is 12h and 27min.On the first day of the month, sunrise is at 05:53 and sunset at 18:16. On the last day of May, in Mawanella, Sri Lanka, sunrise is at 05:50 and sunset at 18:21 +0530.
Sunshine
In Mawanella, Sri Lanka, the average sunshine in May is 10.4h.UV index
January through September, November and December, with an average maximum UV index of 6, 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 ordinary individuals.Note: A maximum UV index of 6 in May translates into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mawanella, Sri Lanka
- Average high temperature in May: 30.1°C
The warmest month (with the highest average high temperature) is March (31.5°C).
The month with the lowest average high temperature is December (27.5°C).
- Average low temperature in May: 21.8°C
The months with the highest average low temperature are May and June (21.8°C).
The coldest month (with the lowest average low temperature) is February (18.1°C).
Average pressure in May
Mawanella, Sri Lanka
- Average pressure in May: 1008.2mbar
The month with the highest atmospheric pressure is January (1011.8mbar).
The month with the lowest atmospheric pressure is June (1008.1mbar).
Average wind speed in May
Mawanella, Sri Lanka
- Average wind speed in May: 9.3km/h
The windiest month (with the highest average wind speed) is June (13.5km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).
Average humidity in May
Mawanella, Sri Lanka
- Average humidity in May: 80%
The month with the highest relative humidity is December (84%).
The month with the lowest relative humidity is March (74%).
Average rainfall in May
Mawanella, Sri Lanka
- Average rainfall in May: 163mm
The wettest month (with the highest rainfall) is October (301mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days in May
Mawanella, Sri Lanka
- Average rainfall days in May: 28.6 days
The month with the highest number of rainy days is May (28.6 days).
The month with the least rainy days is January (14.1 days).
Average daylight in May /
Average sunshine in May
Mawanella, Sri Lanka
- Average daylight in May: 12h and 30min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 42min).
- Average sunshine in May: 10h and 24min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in May
Mawanella, Sri Lanka
- Average sunshine days in May: 1.2 days
The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is May (1.2 days).
Average UV index in May
Mawanella, Sri Lanka
- Average UV index in May: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, November and December (UV index 6).
The month with the lowest UV index is October (UV index 5).
Average cloud cover in May
Mawanella, Sri Lanka
- Average cloud cover in May: 35
The months with the most cloud cover are November and December (Cloud cover 47).
The month with the least cloud cover is March (Cloud cover 27).
Average visibility in May
Mawanella, Sri Lanka
- Average visibility in May: 9km
The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March, April, November and December (8km).





