December weather forecast and climate
Beruwala, Sri Lanka

Weather in December

The first month of the winter, December, is still a warm month in Beruwala, Sri Lanka, with average temperature fluctuating between 29.7°C (85.5°F) and 24.4°C (75.9°F).

Temperature

In Beruwala, Sri Lanka, the average high-temperature in December is almost the same as in November - a still moderately hot 29.7°C (85.5°F). The average low-temperature, in Beruwala, is 24.4°C (75.9°F).

Heat index

The average heat index in December is calculated to be 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 'real feel', 'apparent temperature', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (wind, metabolic differences, differences in body mass, height, and shape). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Beruwala, Sri Lanka, the average relative humidity is 79%.

Rainfall

In Beruwala, it is raining for 16.5 days, with typically 93mm (3.66") of accumulated precipitation. In Beruwala, Sri Lanka, during the entire year, the rain falls for 273.8 days and collects up to 2059mm (81.06") of precipitation.

Sea temperature

In December, the average sea temperature 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 are January, November and December, with an average of 11.8h of daylight.

Sunshine

The average sunshine in Beruwala is 7.1h.

UV index

January through April, July, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in December in Beruwala?

In December, in Beruwala, 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. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 36.5°C (97.7°F).

What is the average humidity in December in Beruwala?

The average relative humidity in December is 79%.

How many days does it rain in December in Beruwala?

In Beruwala, Sri Lanka, in December, during 16.5 rainfall days, 93mm (3.66") of precipitation is typically accumulated.

What is the sea water temperature in December in Beruwala?

In Beruwala, Sri Lanka, in December, the average water temperature is 28.1°C (82.6°F). 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.

What is the month with the shortest days in Beruwala?

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

How many hours of daylight does Beruwala have in December?

In December, the average length of the day in Beruwala is 11.8h.

How many hours of sunshine does Beruwala have in December?

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

What are the months with the highest UV index in Beruwala?

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

What is the UV index intensity in December in Beruwala?

The average daily maximum UV index in December in Beruwala is 7. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.

Average temperature in December
Beruwala, Sri Lanka

Average temperature in December - Beruwala, 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).

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Average pressure in December
Beruwala, Sri Lanka

Average pressure in December - Beruwala, Sri Lanka
  • Average pressure in December: 1010.4mbar

The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.7mbar).

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Average wind speed in December
Beruwala, Sri Lanka

Average wind speed in December - Beruwala, Sri Lanka
  • Average wind speed in December: 11.3km/h

The windiest month (with the highest average wind speed) is June (15.9km/h).
The calmest month (with the lowest average wind speed) is March (7.9km/h).

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Average humidity in December
Beruwala, Sri Lanka

Average humidity in December - Beruwala, 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%).

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Average rainfall in December
Beruwala, Sri Lanka

Average rainfall in December - Beruwala, 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).

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Average rainfall days in December
Beruwala, Sri Lanka

Average rainfall days in December - Beruwala, 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).

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Average sea temperature in December
Beruwala, Sri Lanka

Average sea temperature in December - Beruwala, 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).

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Average daylight in December /
Average sunshine in December
Beruwala, Sri Lanka

Average daylight in December / Average sunshine in December - Beruwala, 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).

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Average sunshine days in December
Beruwala, Sri Lanka

Average sunshine days in December - Beruwala, Sri Lanka
  • Average sunshine days in December: 12.5 days

The month with the most sunshine days is January (21 days).
Months with the least sunshine days are June and July (0.3 days).

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Average UV index in December
Beruwala, Sri Lanka

Average UV index in December - Beruwala, 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).

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Average cloud cover in December
Beruwala, Sri Lanka

Average cloud cover in December - Beruwala, Sri Lanka
  • Average cloud cover in December: 37

The month with the most cloud cover is June (Cloud cover 55).
The month with the least cloud cover is January (Cloud cover 24).

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Average visibility in December
Beruwala, Sri Lanka

Average visibility in December - Beruwala, Sri Lanka
  • Average visibility in December: 10km

Months with the highest visibility are January, February, March, April, November and December (10km).
Months with the lowest visibility are May, June, July, August, September and October (9km).

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