Bentota
Sri Lanka
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Bentota, Sri Lanka

December, the first month of the winter, in Bentota, is also a moderately hot month, with average temperature varying between 24.4°C (75.9°F) and 29.7°C (85.5°F).

Temperature

In December, the average high-temperature is practically the same as in November - a still warm 29.7°C (85.5°F). In Bentota, the average low-temperature is 24.4°C (75.9°F).

Heat index

In December, the average heat index is calculated to a torrid 36.5°C (97.7°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like differences in body mass, height, and shape, metabolic differences, wind, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In December, the average relative humidity in Bentota is 79%.

Rainfall

In December, in Bentota, Sri Lanka, the rain falls for 16.5 days. Throughout December, 93mm (3.66") of precipitation is accumulated. Throughout the year, there are 273.8 rainfall days, and 2059mm (81.06") of precipitation is accumulated.

Sea temperature

In December, the average sea temperature in Bentota is 28.1°C (82.6°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

Months with the shortest days in Bentota are January, November and December, with an average of 11.8h of daylight.

Sunshine

In December, the average sunshine in Bentota is 7.1h.

UV index

Months with the highest UV index are January through April, July, September through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in December in Bentota?

In December, in Bentota, Sri Lanka, the average high-temperature is 29.7°C (85.5°F), and the average low-temperature is 24.4°C (75.9°F). In December, the average heat index (a.k.a. 'feels like', 'real feel'), that combines air temperature and relative humidity, is appraised at 36.5°C (97.7°F).

What is the average humidity in December in Bentota?

In Bentota, the average relative humidity in December is 79%.

How many days does it rain in December in Bentota?

In Bentota, Sri Lanka, in December, it is raining for 16.5 days, with typically 93mm (3.66") of accumulated precipitation.

How warm is the water in December in Bentota?

In Bentota, Sri Lanka, in December, the average water temperature is 28.1°C (82.6°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Bentota?

January, November and December, with an average of 11.8h of daylight, are months with the shortest days.

How many hours of daylight does Bentota have in December?

The average length of the day in December in Bentota is 11.8h.

How long on average sun shines in December in Bentota?

In Bentota, Sri Lanka, the average sunshine in December is 7.1h.

What is the month with the highest UV index in Bentota?

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index in Bentota.

What is the UV index reading in December in Bentota?

In Bentota, Sri Lanka, the average daily maximum UV index in December is 7. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.
Average temperature in December - Bentota, Sri Lanka
  • Average high temperature in December: 29.7°C

The warmest months (with the highest average high temperature) are March and April (31.3°C).
The month with the lowest average high temperature is August (28.6°C).

  • Average low temperature in December: 24.4°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 (23.4°C).

Average humidity in December - Bentota, Sri Lanka
  • Average humidity in December: 79%

Months with the highest relative humidity are June, July and August (83%).
Months with the lowest relative humidity are January and February (75%).

Average rainfall in December - Bentota, Sri Lanka
  • Average rainfall in December: 93mm

The wettest month (with the highest rainfall) is June (350mm).
The driest month (with the least rainfall) is January (25mm).

Average rainfall days in December - Bentota, Sri Lanka
  • Average rainfall days in December: 16.5 days

Months with the highest number of rainy days are July and August (29.5 days).
The month with the least rainy days is January (8.9 days).

Average sea temperature in December - Bentota, Sri Lanka
  • Average sea temperature in December: 28.1°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 July (27.3°C).

Average daylight in December / Average sunshine in December - Bentota, Sri Lanka
  • Average daylight in December: 11.8h

Months with the longest days are June and July (Average daylight: 12.5h).
Months with the shortest days are January, November and December (Average daylight: 11.8h).

  • Average sunshine in December: 7.1h

The month with the most sunshine is January (Average sunshine: 9.2h).
The month with the least sunshine is November (Average sunshine: 6.8h).

Average UV index in December - Bentota, Sri Lanka
  • Average UV index in December: 7

Months with the highest UV index are January, February, March, April, July, September, October, November and December (UV index 7).
Months with the lowest UV index are May, June and August (UV index 6).