May weather forecastDevinuwara, Sri Lanka
May
Weather in May
The last month of the spring, May, is another hot month in Devinuwara, Sri Lanka, with an average temperature ranging between max 30.3°C (86.5°F) and min 26.3°C (79.3°F).Temperature
The dawn of May sees an average high-temperature of a still hot 30.3°C (86.5°F), subtly contrasting with April's 31.1°C (88°F). The temperature during May sees a subtle transition from day to night, averaging a low of 26.3°C (79.3°F).Heat index
The heat index value during May is appraised at a very hot 39°C (102.2°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.Be aware that heat index ratings are designed for shaded locations and minor breezes. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', determines the feeling of heat when you account for the relative humidity. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
May, September and November, with an average relative humidity of 81%, are the most humid months.Rainfall
In Devinuwara, in May, it is raining for 15.6 days, with typically 54mm (2.13") of accumulated precipitation. In Devinuwara, Sri Lanka, during the entire year, the rain falls for 180 days and collects up to 509mm (20.04") of precipitation.Daylight
In Devinuwara, Sri Lanka, the average length of the day in May is 12h and 23min.On the first day of May, sunrise is at 05:54 and sunset at 18:14. On the last day of the month, sunrise is at 05:52 and sunset at 18:18 +0530.
Sunshine
In Devinuwara, the average sunshine in May is 9.3h.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.Note: An average UV index of 7 in May transforms into this advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Devinuwara, Sri Lanka
- Average high temperature in May: 30.3°C
The warmest months (with the highest average high temperature) are March and April (31.1°C).
The month with the lowest average high temperature is September (29.1°C).
- Average low temperature in May: 26.3°C
The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23°C).
Average pressure in May
Devinuwara, Sri Lanka
- Average pressure in May: 1008.9mbar
The month with the highest atmospheric pressure is January (1011.4mbar).
The month with the lowest atmospheric pressure is May (1008.9mbar).
Average wind speed in May
Devinuwara, Sri Lanka
- Average wind speed in May: 15.4km/h
The windiest month (with the highest average wind speed) is July (18.9km/h).
The calmest month (with the lowest average wind speed) is January (9km/h).
Average humidity in May
Devinuwara, Sri Lanka
- Average humidity in May: 81%
The months with the highest relative humidity are May, September and November (81%).
The months with the lowest relative humidity are January and February (77%).
Average rainfall in May
Devinuwara, Sri Lanka
- Average rainfall in May: 54mm
The wettest month (with the highest rainfall) is November (66mm).
The driest month (with the least rainfall) is January (22mm).
Average rainfall days in May
Devinuwara, Sri Lanka
- Average rainfall days in May: 15.6 days
The month with the highest number of rainy days is November (19.8 days).
The month with the least rainy days is June (10.7 days).
Average daylight in May /
Average sunshine in May
Devinuwara, Sri Lanka
- Average daylight in May: 12h and 24min
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 48min).
- Average sunshine in May: 9h and 18min
The month with the most sunshine is April (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days in May
Devinuwara, Sri Lanka
- Average sunshine days in May: 13.5 days
The month with the most sunshine days is July (17.8 days).
The month with the least sunshine days is November (7.8 days).
Average UV index in May
Devinuwara, Sri Lanka
- Average UV index in May: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in May
Devinuwara, Sri Lanka
- Average cloud cover in May: 49
The month with the most cloud cover is June (Cloud cover 53).
The month with the least cloud cover is February (Cloud cover 26).
Average visibility in May
Devinuwara, Sri Lanka
- Average visibility in May: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
