May weather forecastWattala, Sri Lanka
May weather for Wattala, Sri Lanka: The last month of the spring, May, is also a hot month in Wattala, Sri Lanka, with an average temperature fluctuating between 26.3°C (79.3°F) and 30.6°C (87.1°F). On the first day of May in Wattala, Sri Lanka, sunrise is at 05:56 and sunset at 18:18.
May
Weather in May
The last month of the spring, May, is also a hot month in Wattala, Sri Lanka, with an average temperature fluctuating between 26.3°C (79.3°F) and 30.6°C (87.1°F).Temperature
The commencement of May brings an average high-temperature of a still tropical 30.6°C (87.1°F), marking an inconsequential divergence from April. Wattala experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 26.3°C (79.3°F) throughout May.Heat index
During May, the heat index is evaluated at an extremely hot 40°C (104°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.Records show heat index calculations are tailored for shaded regions and mild winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
In Wattala, the average relative humidity in May is 81%.Rainfall
In Wattala, in May, during 28.8 rainfall days, 306mm (12.05") of precipitation is typically accumulated. Throughout the year, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.Sea temperature
In Wattala, in May, the average water temperature is 29.3°C (84.7°F).Note: Water temperatures ranging between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, making swimming, diving, and similar water activities pleasurable for extended periods.
Daylight
In May, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 05:56 and sunset at 18:18. On the last day of May, in Wattala, sunrise is at 05:53 and sunset at 18:23 +0530.
Sunshine
The average sunshine in May is 8.6h.UV index
The months with the lowest UV index are May, June, August and October, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.Note: In May, the maximum UV index of 6 suggests this advice:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Notice! The reflection of water and sand increases the UV radiation significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Wattala, Sri Lanka
- Average high temperature in May: 30.6°C
The warmest months (with the highest average high temperature) are March and April (31.8°C).
The months with the lowest average high temperature are July and August (28.9°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 (23.1°C).
Average pressure in May
Wattala, Sri Lanka
- Average pressure in May: 1008.6mbar
The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).
Average wind speed in May
Wattala, Sri Lanka
- Average wind speed in May: 12.9km/h
The windiest month (with the highest average wind speed) is June (15.1km/h).
The calmest month (with the lowest average wind speed) is March (8km/h).
Average humidity in May
Wattala, Sri Lanka
- Average humidity in May: 81%
The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall in May
Wattala, Sri Lanka
- Average rainfall in May: 306mm
The wettest month (with the highest rainfall) is June (341mm).
The driest month (with the least rainfall) is January (40mm).
Average rainfall days in May
Wattala, Sri Lanka
- Average rainfall days in May: 28.8 days
The month with the highest number of rainy days is August (30.2 days).
The month with the least rainy days is January (11.6 days).
Average sea temperature in May
Wattala, Sri Lanka
- Average sea temperature in May: 29.3°C
The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27.2°C).
Average daylight in May /
Average sunshine in May
Wattala, 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 42min).
- Average sunshine in May: 8h and 36min
The month with the most sunshine is January (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in May
Wattala, Sri Lanka
- Average sunshine days in May: 1.3 days
The month with the most sunshine days is January (17.2 days).
The months with the least sunshine days are June and August (0.3 days).
Average UV index in May
Wattala, Sri Lanka
- Average UV index in May: 6
The months with the highest UV index are January, February, March, April, July, September, November and December (UV index 7).
The months with the lowest UV index are May, June, August and October (UV index 6).
Average cloud cover in May
Wattala, Sri Lanka
- Average cloud cover in May: 54
The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in May
Wattala, Sri Lanka
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).
