Unawatuna
Sri Lanka
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Unawatuna, Sri Lanka

The first month of the winter, December, is still a warm month in Unawatuna, Sri Lanka, with average temperature varying between 22°C (71.6°F) and 29°C (84.2°F).

Temperature

The coldest months are January, June through December, with an average high-temperature of 29°C (84.2°F).

Rainfall

In December, the rain falls for 10 days. Throughout December, 181mm (7.1") of precipitation is accumulated. In Unawatuna, during the entire year, the rain falls for 122 days and collects up to 2503mm (98.5") of precipitation.

Sea temperature

Months with the coldest seawater are January, February, June through October and December, with an average sea temperature of 28°C (82.4°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

January and December, with an average of 11.8h of daylight, are months with the shortest days in Unawatuna, Sri Lanka.

Sunshine

In Unawatuna, the average sunshine is 7h.

UV index

November and December, with an average maximum UV index of 11, are months with the lowest UV index. A UV Index reading of 11, and higher, represents an extreme threat to health from unsafe exposure to the UV radiation for the ordinary person.
The average daily UV index of 11 transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What are the coldest months in Unawatuna?

The coldest months are January, June through December, with an average high-temperature of 29°C (84.2°F).

What is the temperature in December in Unawatuna?

The average high-temperature, in December, is 29°C (84.2°F), while the average low-temperature is 22°C (71.6°F).

How much does it rain in Unawatuna in December?

In Unawatuna, during December, the rain falls for 10 days and regularly aggregates up to 181mm (7.1") of precipitation.

What are the months with the coldest sea water in Unawatuna?

January, February, June through October and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater. For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the sea water temperature in December in Unawatuna?

In Unawatuna, Sri Lanka, in December, the average water temperature is 28°C (82.4°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Unawatuna?

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

What is the average length of the day in December in Unawatuna?

In Unawatuna, Sri Lanka, the average length of the day in December is 11.8h.

How many hours of sunshine does Unawatuna have in December?

The average sunshine in December in Unawatuna is 7h.

What are the months with the lowest UV index in Unawatuna?

Months with the lowest UV index in Unawatuna are November and December, with an average maximum UV index of 11.

How high is the UV index in December in Unawatuna?

In Unawatuna, Sri Lanka, the average daily maximum UV index in December is 11. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Unawatuna, Sri Lanka
  • Average high temperature in December: 29°C

Warmest months (with the highest average high temperature) are March and April (31°C).
Months with the lowest average high temperature are January, June, July, August, September, October, November and December (29°C).

  • Average low temperature in December: 22°C

The month with the highest average low temperature is May (25°C).
Coldest months (with the lowest average low temperature) are January, February, November and December (22°C).

Average rainfall in December - Unawatuna, Sri Lanka
  • Average rainfall in December: 181mm

The wettest month (with the highest rainfall) is October (340mm).
The driest month (with the lowest rainfall) is January (94mm).

Average rainfall days in December - Unawatuna, Sri Lanka
  • Average rainfall days in December: 10 days

Months with the highest number of rainy days are October and November (14 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in December - Unawatuna, Sri Lanka
  • Average sea temperature in December: 28°C

The best month for swimming (with the highest average sea temperature) is April (30°C).
Coldest months (with the lowest average sea temperature) are January, February, June, July, August, September, October and December (28°C).

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

The month with the longest days is June (Average daylight: 12.5h).
Months with shortest days are January and December (Average daylight: 11.8h).

  • Average sunshine in December: 7h

Months with most sunshine are February and March (Average sunshine: 8h).
Months with least sunshine are May, June, July, August, September, October and November (Average sunshine: 6).

Average UV index in December - Unawatuna, Sri Lanka
  • Average UV index in December: 11

Months with the highest UV index are January, February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are November and December (UV index 11).