Climate and monthly weather forecastTrincomalee, Sri Lanka
Climate and monthly weather forecast
The climate of Trincomalee
Located on the eastern coast of Sri Lanka, Trincomalee endures a tropical wet and dry climate, known as the Köppen As climate classification. Throughout the year, the city experiences high temperatures ranging from 29.3°C (84.7°F) to 34.9°C (94.8°F) and low temperatures between 20°C (68°F) and 24.8°C (76.6°F), revealing an overall warm environment. The humidity levels remain relatively consistent, oscillating from 67% to 84%.Diving into the elements of weather, it's found that rainfall presents significant fluctuation, with January and February seeing the least precipitation at 42mm (1.65") and 47mm (1.85") respectively, and peaking in October with a much heavier downpour at 214mm (8.43"). The number of rainfall days reflects the same pattern with a high of 24.1 days in November and a substantially lower count of 7.8 days in June.
Observing the sea temperature, it stays between 27.1°C (80.8°F) to 30.2°C (86.4°F) throughout the year, providing a consistently warm condition for marine activities. The numbers of daylight hours reveal a slight variation, ranging from 11.6 to 12.6 hours, ensuring well-lit conditions for the majority of the day. On the other hand, the duration of sunshine varies from a maximum of 11.3 hours in June to a minimum of 4.9 hours in December. Wind speeds fluctuate throughout the year with the highest average wind speed reaching 23.8km/h (14.8mph) in June, and the lowest average at 7.1km/h (4.4mph) in April.
The best time to visit Trincomalee
Considering the overall climatic conditions, the most favorable time to visit Trincomalee falls between March and May. During this period, the city witnesses the highest temperatures averaging from 33.8°C (92.8°F) to 34.9°C (94.8°F), balanced with moderate levels of relative humidity around 73%. Moreover, it's the season before the heaviest rainfall, making it perfect for outdoor activities. Additionally, the sea temperature escalates to around 29.8°C (85.6°F) to 30.2°C (86.4°F), ideal for swimming and other water-related activities.The worst time to visit Trincomalee
Contrastingly, October and November are considerably unfavorable for visiting Trincomalee, largely due to weather conditions. In these months, the city faces the most substantial rainfall levels from 214mm (8.43") to 166mm (6.54") consecutively, coupled with the highest count of rain days measuring from 22.6 to 24.1 days. Moreover, the city receives less sunshine during these months, limiting daylight recreational activities.Spring weather in Trincomalee
Spring, which runs from March to May, marks warmer temperatures with highs hovering between 33.8°C (92.8°F) to 34.9°C (94.8°F). The rainfall decreases noticeably during this season, reducing from 38mm (1.5") in March to 15mm (0.59") in June, with rainfall days from 14 to 7.8 days. The sea temperature rises gradually from 28.8°C (83.8°F) to 29.9°C (85.8°F), making it an excellent time for beach activities.Summer weather in Trincomalee
In Trincomalee, summer spans from June to August, presenting relatively high temperatures with a peak of 33.7°C (92.7°F) in August. A significant feature of the summer here is the noticeable dip in rainfall with just 26mm (1.02") recorded in July, the lowest throughout the year. The average wind speed increases to around 23.8km/h (14.8mph) in June, making it a pleasant time for wind-dependent activities.Autumn weather in Trincomalee
Autumn, lasting from September to November, ushers in high rainfall in Trincomalee. The precipitation spikes from 53mm (2.09") in September to a substantial 166mm (6.54") in November. However, the temperature remains comfortably warm, averaging between 32.7°C (90.9°F) and 30.5°C (86.9°F). On average, the wind speed declines from 18.7km/h (11.6mph) to 7.9km/h (4.9mph) over these months.Winter weather in Trincomalee
Winter in Trincomalee, extending from December to February, experiences temperatures between 29.3°C (84.7°F) to 31.3°C (88.3°F). The relative humidity heightens to 82% in December and 84% in February, the highest of the year. Rainfall, while decreased from autumn, is still considerable with recorded levels of 127mm (5") in December and 42mm (1.65") in January. The sea temperature falls to 27.8°C (82°F) in December and February, with a slight upsurge to 27.1°C (80.8°F) in January.Weather in January
A new year emerges in Trincomalee with slightly cooler temperatures compared to the year-ending December. January flaunts an impressive balance between rainfall and sunshine, providing visitors with ample time to explore. Hosting the region's wet season, the month still holds a blend of rain and shine. Weather in January »Weather in February
As Trincomalee transitions from January to February, an apparent shift in weather patterns is noticeable. Sunshine hours increase significantly, providing longer daylight to bask under. However, one should take heed of the UV index during outdoor activities. Weather in February »Weather in March
March greets Trincomalee with significantly warmer days compared to February. Visitors enjoy bountiful sunshine, making it a splendid time for outdoor exploration. March experiences a lower number of rainfall days, resulting in clear skies for the majority of the month. Weather in March »Weather in April
Moving forward from March, April witnesses a drastic modification in Trincomalee's climate. With an average highest temperature of 34.9°C (94.8°F), this month records the warmest days of the year. Captivatingly, the sea temperature closely follows the trend, reaching a high point. Weather in April »Weather in May
The transition from April to May in Trincomalee brings subtle alterations in the weather conditions. Temperature variations are slight, still managing to uphold sunny days coupled with a generous share of rainfall. The sea remains warm, favoring sea activities. Weather in May »Weather in June
June rolls in, bringing an interesting twist to Trincomalee's weather narrative. Despite being midway through the year, there is a stark decline in rainfall to 15mm (0.59"). This decrease is coupled with a rise in the number of sunshine days, giving June its uniquely arid character. Weather in June »Weather in July
Trincomalee’s climate sees minimal changes as June gives way to July. Remarkably, despite the high temperatures, July witnesses only a slight raise in sea temperature to 29.4°C (84.9°F). The rest of July remains more or less similar to June with moderate rainfall and high wind speeds. Weather in July »Weather in August
August in Trincomalee comes with a slight decline in temperatures compared to July. Nonetheless, the weather continues to offer warm days and cool nights. Despite a small increase in rainfall, the majority of days stay dry, keeping the overall environment pleasant. Weather in August »Weather in September
September in Trincomalee marks a shift towards the year-end weather patterns. As temperatures remain high, the month experiences a considerable upsurge in rainfall to 53mm (2.09"). September upholds a pleasant maritime climate with a gentle cooling effect brought on by the rainfall. Weather in September »Weather in October
Trincomalee witnesses a significant transition in weather conditions from September to October. The 214mm (8.43") of rainfall indicates October as the rainiest month of the year. This enormous surge in rainfall is juxtaposed with limit in the number of sunshine days. Weather in October »Weather in November
Come November and Trincomalee braces itself for a copious amount of rain after the super wet October. The charm of the rain-soaked city catches the eyes of rain lovers. Despite this, the warmth of the sun isn’t entirely absent, as November records fair sunshine hours. Weather in November »Weather in December
As the year concludes, December receives less precipitation than November, but relatively higher than January. Marking the tail end of the rainy season, this month witnesses a considerable drop in rainfall compared to November's records. Weather in December »Updated: Feb 6, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Trincomalee, Sri Lanka, January and December are characterised by the lowest temperatures, recording an average high of 29.3°C (84.7°F).
Throughout the year, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.
With an average sea temperature of 27.1°C (80.8°F), January is the month with the coldest seawater.
January, November and December, with an average maximum UV index of 6, are months with the lowest UV index.
February through October, with an average maximum UV index of 7, are months with the highest UV index in Trincomalee.
April is Trincomalee's warmest month, registering average high temperatures of 34.9°C (94.8°F) and lows of 23.5°C (74.3°F).
May is the month with the warmest seawater, with an average sea temperature of 30.2°C (86.4°F).
The months with the lowest humidity in Trincomalee are June through September, with an average relative humidity of 67%.
The month with the least rainfall in Trincomalee, Sri Lanka, is June, when the rain falls for 7.8 days and typically collects 15mm (0.59") of precipitation.
The month with the longest days in Trincomalee is June, with an average of 12h and 36min of daylight.
With an average of 11.3h of sunshine, June has the most sunshine of the year.
October is the month with the most rainfall in Trincomalee. Rain falls for 22.6 days and accumulates 214mm (8.43") of precipitation.
December is the most humid month, with an average relative humidity of 84%.
The month with the shortest days is December, with an average of 11h and 36min of daylight.
Trincomalee does not observe Daylight Saving Time (DST). +0530 timezone is used over the entire year.
With an average of 4.9h of sunshine, December has the least sunshine of the year.
Average temperature
Trincomalee, Sri Lanka
The warmest month (with the highest average high temperature) is April (34.9°C).
The months with the lowest average high temperature are January and December (29.3°C).
The month with the highest average low temperature is June (24.8°C).
The coldest months (with the lowest average low temperature) are January and February (20°C).
Average pressure
Trincomalee, Sri Lanka
- Average pressure in January:
1012mbar - Average pressure in February:
1011.6mbar - Average pressure in March:
1010.8mbar - Average pressure in April:
1009.4mbar - Average pressure in May:
1007.8mbar - Average pressure in June:
1007.5mbar
- Average pressure in July:
1007.6mbar - Average pressure in August:
1008mbar - Average pressure in September:
1008.8mbar - Average pressure in October:
1009.5mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1010.6mbar
The month with the highest atmospheric pressure is January (1012mbar).
The month with the lowest atmospheric pressure is June (1007.5mbar).
Average wind speed
Trincomalee, Sri Lanka
- Average wind speed in January:
9.9km/h - Average wind speed in February:
10.3km/h - Average wind speed in March:
8.7km/h - Average wind speed in April:
7.1km/h - Average wind speed in May:
15.9km/h - Average wind speed in June:
23.8km/h
- Average wind speed in July:
22.6km/h - Average wind speed in August:
21.3km/h - Average wind speed in September:
18.7km/h - Average wind speed in October:
11.1km/h - Average wind speed in November:
7.9km/h - Average wind speed in December:
9.1km/h
The windiest month (with the highest average wind speed) is June (23.8km/h).
The calmest month (with the lowest average wind speed) is April (7.1km/h).
Average humidity
Trincomalee, Sri Lanka
The month with the highest relative humidity is December (84%).
The months with the lowest relative humidity are June, July, August and September (67%).
Average rainfall
Trincomalee, Sri Lanka
The wettest month (with the highest rainfall) is October (214mm).
The driest month (with the least rainfall) is June (15mm).
Average rainfall days
Trincomalee, Sri Lanka
- Average rainfall days in January:
16 days - Average rainfall days in February:
13.1 days - Average rainfall days in March:
14 days - Average rainfall days in April:
23.6 days - Average rainfall days in May:
17.4 days - Average rainfall days in June:
7.8 days
- Average rainfall days in July:
10.3 days - Average rainfall days in August:
11.5 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
22.6 days - Average rainfall days in November:
24.1 days - Average rainfall days in December:
22.9 days
The month with the highest number of rainy days is November (24.1 days).
The month with the least rainy days is June (7.8 days).
Average sea temperature
Trincomalee, Sri Lanka
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 / Average sunshine
Trincomalee, Sri Lanka
- Average daylight in January:
11h and 42min - Average daylight in February:
11h and 54min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 18min - Average daylight in May:
12h and 30min - Average daylight in June:
12h and 36min
- Average daylight in July:
12h and 36min - Average daylight in August:
12h and 24min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 54min - Average daylight in November:
11h and 42min - Average daylight in December:
11h and 36min
The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in January:
7h and 24min - Average sunshine in February:
8h and 12min - Average sunshine in March:
9h and 6min - Average sunshine in April:
10h and 6min - Average sunshine in May:
11h and 12min - Average sunshine in June:
11h and 18min
- Average sunshine in July:
11h and 12min - Average sunshine in August:
9h and 36min - Average sunshine in September:
10h and 54min - Average sunshine in October:
8h and 18min - Average sunshine in November:
6h and 24min - Average sunshine in December:
4h and 54min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days
Trincomalee, Sri Lanka
- Average sunshine days in January:
11.7 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
14.5 days - Average sunshine days in April:
4.3 days - Average sunshine days in May:
10.4 days - Average sunshine days in June:
15.7 days
- Average sunshine days in July:
16 days - Average sunshine days in August:
14.7 days - Average sunshine days in September:
13.3 days - Average sunshine days in October:
6.4 days - Average sunshine days in November:
4.2 days - Average sunshine days in December:
5.9 days
The month with the most sunshine days is July (16 days).
The month with the least sunshine days is November (4.2 days).
Average UV index
Trincomalee, Sri Lanka
The months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, November and December (UV index 6).
Average cloud cover
Trincomalee, Sri Lanka
The month with the most cloud cover is December (Cloud cover 56).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility
Trincomalee, Sri Lanka
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January and December (7km).
