Jaffna
Sri Lanka
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Jaffna, Sri Lanka

The first month of the winter, December, is also a moderately hot month in Jaffna, Sri Lanka, with average temperature fluctuating between 24°C (75.2°F) and 28°C (82.4°F).

Temperature

January and December, with an average high-temperature of 28°C (82.4°F), are the coldest months.

Rainfall

In Jaffna, Sri Lanka, it is raining for 10 days, with typically 260mm (10.2") of accumulated precipitation. In Jaffna, during the entire year, the rain falls for 57 days and collects up to 1200mm (47.2") of precipitation.

Sea temperature

In Jaffna, the average seawater temperature in December is 27.3°C (81.1°F).
Note: 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.

Daylight

January and December, with an average of 11.6h of daylight, are months with the shortest days.

Sunshine

June, July, October through December, with an average of 6h of sunshine, are months with the least sunshine in Jaffna.

UV index

November and December, with an average maximum UV index of 10, are months with the lowest UV index. A UV Index reading of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 10 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the coldest month in Jaffna?

January and December, with an average high-temperature of 28°C (82.4°F), are the coldest months.

What is the temperature in December in Jaffna?

In December, in Jaffna, Sri Lanka, the average high-temperature is 28°C (82.4°F), and the average low-temperature is 24°C (75.2°F).

How many days does it rain in December in Jaffna?

In Jaffna, during December, the rain falls for 10 days and regularly aggregates up to 260mm (10.2") of precipitation.

What is the sea water temperature in December in Jaffna?

In Jaffna, Sri Lanka, the average seawater temperature in December is 27.3°C (81.1°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 Jaffna?

January and December, with an average of 11.6h of daylight, are months with the shortest days.

How many hours of daylight does Jaffna have in December?

In Jaffna, Sri Lanka, the average length of the day in December is 11.6h.

What is the month with the least sunshine in Jaffna?

June, July, October through December, with an average of 6h of sunshine, are months with the least sunshine in Jaffna.

How long on average sun shines in December in Jaffna?

In Jaffna, the average sunshine in December is 6h.

What is the month with the lowest UV index in Jaffna?

November and December, with an average maximum UV index of 10, are months with the lowest UV index in Jaffna.

What is the UV index reading in December in Jaffna?

In Jaffna, Sri Lanka, the average daily maximum UV index in December is 10. A UV Index reading of 8 to 10 represents a very high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in December - Jaffna, Sri Lanka
  • Average high temperature in December: 28°C

The warmest month (with the highest average high temperature) is May (34°C).
Months with the lowest average high temperature are January and December (28°C).

  • Average low temperature in December: 24°C

The month with the highest average low temperature is April (27°C).
The coldest month (with the lowest average low temperature) is January (23°C).

Average rainfall in December - Jaffna, Sri Lanka
  • Average rainfall in December: 260mm

The wettest month (with the highest rainfall) is November (380mm).
The driest month (with the lowest rainfall) is June (10mm).

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

The month with the highest number of rainy days is November (12 days).
The month with the lowest number of rainy days is June (1 days).

Average sea temperature in December - Jaffna, Sri Lanka
  • Average sea temperature in December: 27.3°C

The best month for swimming (with the highest average sea temperature) is April (30.1°C).
The coldest month (with the lowest average sea temperature) is January (26.8°C).

Average daylight in December / Average sunshine in December - Jaffna, Sri Lanka
  • Average daylight in December: 11.6h

The month with the longest days is June (Average daylight: 12.7h).
Months with shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in December: 6h

The month with most sunshine is March (Average sunshine: 9h).
Months with least sunshine are June, July, October, November and December (Average sunshine: 6).

Average UV index in December - Jaffna, Sri Lanka
  • Average UV index in December: 10

Months with the highest UV index are 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 10).