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

Monthly weather forecast and climate
Jaffna, Sri Lanka

The best months for a swim in Jaffna, Sri Lanka, are January through March, June through September, with a perfect temperature - varying between 25°C (77°F) and 29°C (84.2°F), and scarce rainfall.

January, like December, in Jaffna, Sri Lanka, is another warm winter month, with average temperature varying between 28°C (82.4°F) and 23°C (73.4°F). The ideal sea water temperature of 26.8°C (80.2°F) and only 4 rainfall days, with 70mm (2.8") of accumulated rainfall, make January the best time for swimming and other water activities. Weather in January »

February, the last month of the winter, in Jaffna, is also a moderately hot month, with average temperature ranging between max 29°C (84.2°F) and min 24°C (75.2°F). The ideal sea water temperature of 27.5°C (81.5°F) and only 2 rainfall days, with 30mm (1.2") of accumulated rainfall, make February the best time for swimming and other water activities. Weather in February »

March, the first month of the spring, in Jaffna, is a tropical month, with average temperature ranging between min 25°C (77°F) and max 31°C (87.8°F). The ideal sea water temperature of 28.7°C (83.7°F) and only 2 rainfall days, with 20mm (0.8") of accumulated rainfall, make March the best time for swimming and other water activities. Weather in March »

April, like March, is another tropical spring month in Jaffna, Sri Lanka, with average temperature fluctuating between 27°C (80.6°F) and 33°C (91.4°F). In April, the average high-temperature is relatively the same as in March - a still tropical 33°C (91.4°F). Weather in April »

The last month of the spring, May, is also a hot month in Jaffna, Sri Lanka, with temperature in the range of an average low of 26°C (78.8°F) and an average high of 34°C (93.2°F). The warmest month is May, with an average high-temperature of 34°C (93.2°F) and an average low-temperature of 26°C (78.8°F). Weather in May »

June, the first month of the summer, in Jaffna, is also a hot month, with average temperature ranging between max 33°C (91.4°F) and min 26°C (78.8°F). The ideal sea water temperature of 29.4°C (84.9°F) and only 1 rainfall days, with 10mm (0.4") of accumulated rainfall, make June the best time for swimming and other water activities. Weather in June »

July, like June, is another hot summer month in Jaffna, Sri Lanka, with average temperature varying between 33°C (91.4°F) and 25°C (77°F). The ideal sea water temperature of 29.3°C (84.7°F) and only 3 rainfall days, with 20mm (0.8") of accumulated rainfall, make July the best time for swimming and other water activities. Weather in July »

August, the last month of the summer, in Jaffna, is another hot month, with average temperature ranging between min 25°C (77°F) and max 33°C (91.4°F). The ideal sea water temperature of 28.8°C (83.8°F) and only 3 rainfall days, with 30mm (1.2") of accumulated rainfall, make August the best time for swimming and other water activities. Weather in August »

September, the first month of the autumn, in Jaffna, is also a hot month, with temperature in the range of an average low of 25°C (77°F) and an average high of 32°C (89.6°F). The ideal sea water temperature of 29°C (84.2°F) and only 4 rainfall days, with 60mm (2.4") of accumulated rainfall, make September the best time for swimming and other water activities. Weather in September »

October, the same as September, in Jaffna, Sri Lanka, is another hot autumn month, with average temperature varying between 25°C (77°F) and 31°C (87.8°F). In October, the average high-temperature is essentially the same as in September - a still tropical 31°C (87.8°F). Weather in October »

The last month of the autumn, November, is another warm month in Jaffna, Sri Lanka, with average temperature fluctuating between 24°C (75.2°F) and 29°C (84.2°F). In November, the average high-temperature is almost the same as in October - a moderately hot 29°C (84.2°F). Weather in November »

December, the first month of the winter, in Jaffna, is still a warm month, with average temperature ranging between min 24°C (75.2°F) and max 28°C (82.4°F). January and December, with an average high-temperature of 28°C (82.4°F), are the coldest months. In Jaffna, during 10 rainfall days, 260mm (10.2") of precipitation is typically accumulated. Weather in December »

What are the coldest months in Jaffna?

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

How much does it rain in Jaffna?

In Jaffna, during the entire year, the rain falls for 57 days and collects up to 1200mm (47.2") of precipitation.

What month is the sea coldest in Jaffna?

With an average sea temperature of 26.8°C (80.2°F), January is the month with the coldest seawater in Jaffna, Sri Lanka.

What is the month with the shortest days in Jaffna?

Months with the shortest days in Jaffna, Sri Lanka, are January and December, with an average of 11.6h of daylight.

When is the highest UV index in Jaffna?

Months with the highest UV index in Jaffna, Sri Lanka, are February through October, with an average maximum UV index of 12.

What month has the most sunshine in Jaffna?

The month with the most sunshine in Jaffna is March, with an average of 9h of sunshine.

What month is the sea warmest in Jaffna?

With an average sea temperature of 30.1°C (86.2°F), April is the month with the warmest seawater in Jaffna, Sri Lanka.

What is the warmest month in Jaffna?

With an average high-temperature of 34°C (93.2°F) and an average low-temperature of 26°C (78.8°F), May is the warmest month in Jaffna.

What is the driest month in Jaffna?

The month with the least rainfall is June when the rain falls for 1 days and typically collects 10mm (0.4") of precipitation.

When are the longest days in Jaffna?

With an average of 12.7h of daylight, June has the longest days of the year in Jaffna, Sri Lanka.

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.

What is the wettest month in Jaffna?

The month with the most rainfall is November when the rain falls for 12 days and typically aggregates up to 380mm (15") of precipitation.

What are the months 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.
Average rainfall - Jaffna, Sri Lanka
Average rainfall days - Jaffna, Sri Lanka
Average sea temperature - Jaffna, Sri Lanka

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 / Average sunshine - Jaffna, Sri Lanka

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

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 - Jaffna, Sri Lanka

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).