September weather forecast and climate
Trincomalee, Sri Lanka

Temperature

The average high-temperature, in Trincomalee, is 33.9°C (93°F), while the average low-temperature is 25.2°C (77.4°F).

Rainfall

In Trincomalee, it is raining for 6 days, with typically 104mm (4.1") of accumulated precipitation. Throughout the year, in Trincomalee, Sri Lanka, there are 87 rainfall days, and 1569mm (61.8") of precipitation is accumulated.

Sea temperature

In Trincomalee, the average seawater temperature in September is 29.2°C (84.6°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.

Daylight

In Trincomalee, the average length of the day is 12.2h.

Sunshine

The average sunshine in September is 7h.

UV index

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

What is the temperature in September in Trincomalee?

In September, in Trincomalee, Sri Lanka, the average high-temperature is 33.9°C (93°F), and the average low-temperature is 25.2°C (77.4°F).

How many days does it rain in September in Trincomalee?

In Trincomalee, in September, it is raining for 6 days, with typically 104mm (4.1") of accumulated precipitation.

What is the water temperature in September in Trincomalee?

In Trincomalee, the average seawater temperature in September is 29.2°C (84.6°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.

How many hours of daylight does Trincomalee have in September?

The average length of the day in September is 12.2h.

How long on average sun shines in September in Trincomalee?

In September, the average sunshine is 7h.

When is the highest UV index in Trincomalee?

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

What is the UV index reading in September in Trincomalee?

In Trincomalee, the average UV index in September is 12.
Average temperature in September - Trincomalee, Sri Lanka
  • Average high temperature in September: 33.9°C

The warmest month (with the highest average high temperature) is June (34.7°C).
The month with the lowest average high temperature is January (27.9°C).

  • Average low temperature in September: 25.2°C

Months with the highest average low temperature are May and June (26.4°C).
Coldest months (with the lowest average low temperature) are November and December (24.2°C).

Average rainfall in September - Trincomalee, Sri Lanka
  • Average rainfall in September: 104mm

The wettest month (with the highest rainfall) is December (341mm).
The driest month (with the lowest rainfall) is June (26mm).

Average rainfall days in September - Trincomalee, Sri Lanka
  • Average rainfall days in September: 6 days

Months with the highest number of rainy days are November and December (16 days).
The month with the lowest number of rainy days is June (2 days).

Average sea temperature in September - Trincomalee, Sri Lanka
  • Average sea temperature in September: 29.2°C

The best month for swimming (with the highest average sea temperature) is May (30.2°C).
The coldest month (with the lowest average sea temperature) is January (27.1°C).

Average daylight in September / Average sunshine in September - Trincomalee, Sri Lanka
  • Average daylight in September: 12.2h

Months with the longest days are June and July (Average daylight: 12.6h).
The month with shortest days is December (Average daylight: 11.6h).

  • Average sunshine in September: 7h

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

Average UV index in September - Trincomalee, Sri Lanka
  • Average UV index in September: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).

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