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

May weather forecast and climate
Jaffna, Sri Lanka

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

Temperature

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.

Rainfall

In Jaffna, in May, during 3 rainfall days, 40mm (1.6") of precipitation is typically accumulated. In Jaffna, Sri Lanka, during the entire year, the rain falls for 57 days and collects up to 1200mm (47.2") of precipitation.

Sea temperature

In Jaffna, Sri Lanka, the average seawater temperature in May is 30°C (86°F). The water temperature above 30°C (86°F) is arguably regarded as unpleasant. The primary purpose of entering the water - cooling down from sunshine and high temperatures - is lost.

Daylight

In May, the average length of the day in Jaffna is 12.6h.

Sunshine

In Jaffna, the average sunshine is 7h.

UV index

Months with the highest UV index are February through October, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
The average daily UV index of 12 transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. 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. 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. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

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.

What is the temperature in May in Jaffna?

The average high-temperature, in May, is 34°C (93.2°F), while the average low-temperature is 26°C (78.8°F).

How many days does it rain in May in Jaffna?

In May, the rain falls for 3 days. Throughout May, 40mm (1.6") of precipitation is accumulated.

How warm is the water in May in Jaffna?

In Jaffna, Sri Lanka, the average seawater temperature in May is 30°C (86°F). The surface water temperatures above 30°C (86°F) are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

How many hours of daylight does Jaffna have in May?

In May, the average length of the day is 12.6h.

How long on average sun shines in May in Jaffna?

The average sunshine in May is 7h.

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

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

How high is the UV index in May in Jaffna?

In Jaffna, Sri Lanka, the average daily maximum UV index in May is 12. A UV Index reading of 11, and higher, represents an extreme health vulnerability from unprotected exposure to the UV radiation.
Average temperature in May - Jaffna, Sri Lanka
  • Average high temperature in May: 34°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 May: 26°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 May - Jaffna, Sri Lanka
  • Average rainfall in May: 40mm

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

Average rainfall days in May - Jaffna, Sri Lanka
  • Average rainfall days in May: 3 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 May - Jaffna, Sri Lanka
  • Average sea temperature in May: 30°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 May / Average sunshine in May - Jaffna, Sri Lanka
  • Average daylight in May: 12.6h

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 May: 7h

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 May - Jaffna, Sri Lanka
  • Average UV index in May: 12

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).