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Contents
- The climate of Unawatuna
- The best time to visit Unawatuna
- The worst time to visit Unawatuna
- Spring weather in Unawatuna
- Summer weather in Unawatuna
- Autumn weather in Unawatuna
- Winter weather in Unawatuna
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Unawatuna
Unawatuna, a coastal town in Sri Lanka, holds a climatic setting classified as Af - denoting a Tropical Rainforest climate, as per the Köppen system. Owing to its geographical positioning, it experiences rather steady temperature ranges throughout the year, paired with significant rainfall, and this defines the climatic character of this area. Underneath the sunny, tropical sky, the town witnesses temperature highs hovering from 28.3°C (82.9°F) to 30.3°C (86.5°F) and lows varying between 24°C (75.2°F) and 26.7°C (80.1°F).
Unawatuna thrives under consistent humidity levels that range from 77% to 82%, throughout twelve months. The moisture-laden winds bring in rainfall amounts that fluctuate from 38mm (1.5") in February to 302mm (11.89") in May. Rainfall days from 14.8 to around 28 scattered across monthly averages further emphasises this tropical wet climate. The seven units of UV index throughout the span of a year, barring May and September with six units, suggest the need for efficient sun protectants during outdoor activities.
The baseline sea temperature rests at a comforting 28°C (82.4°F), climbing to 29°C (84.2°F) and 30°C (86°F) in the months of March, April and November, making beach activities doable throughout the year. A noticeable element in Unawatuna’s weather pattern is the frequency of sunshine days. They drop from 12.8 in January to a lean 1-day average during June and July, followed by a gradual rise again. This oscillation can be attributed to the dense cloud cover, recorded between 27% and 51% of the year, offering a visual spectacle to the sky observers.
Unawatuna thrives under consistent humidity levels that range from 77% to 82%, throughout twelve months. The moisture-laden winds bring in rainfall amounts that fluctuate from 38mm (1.5") in February to 302mm (11.89") in May. Rainfall days from 14.8 to around 28 scattered across monthly averages further emphasises this tropical wet climate. The seven units of UV index throughout the span of a year, barring May and September with six units, suggest the need for efficient sun protectants during outdoor activities.
The baseline sea temperature rests at a comforting 28°C (82.4°F), climbing to 29°C (84.2°F) and 30°C (86°F) in the months of March, April and November, making beach activities doable throughout the year. A noticeable element in Unawatuna’s weather pattern is the frequency of sunshine days. They drop from 12.8 in January to a lean 1-day average during June and July, followed by a gradual rise again. This oscillation can be attributed to the dense cloud cover, recorded between 27% and 51% of the year, offering a visual spectacle to the sky observers.
The best time to visit Unawatuna
Considering the overall climatic conditions, the ideal time for visiting Unawatuna could be the period between January and February. Despite the modest rainfall quantity of 38mm (1.5") and 50mm (1.97"), these months offer favourable conditions with temperature highs of 29.2°C (84.6°F) and 29.7°C (85.5°F), matched with lows of 24°C (75.2°F) and 24.3°C (75.7°F). The increased duration of daylight, 11.8 hours in January and 11.9 hours in February, coupled with 9 hours of sunshine, enhance outdoor exploration possibilities. The UV index at seven, prompts visitors to remain sun-safe during the sunny hours.
The worst time to visit Unawatuna
A less desirable time for visits to Unawatuna pertains to the zenith of monsoon, marked in May and June, with a rainfall amount of 302mm (11.89") and 250mm (9.84") respectively. The addition of a high of 28 days of rainfall in June to this damp circumstance could deter outdoor plans. Despite the sea temperature being as warm as 29°C (84.2°F) to 30°C (86°F), the five hours average daylight time coupled with just 1 to 1.4 sunshine days in this period restricts enjoyment of the beach to a great extent.
Spring weather in Unawatuna
During the spring months of March to May, Unawatuna presents a rather mixed bag of weather conditions. The town experiences temperature highs of around 30.3°C (86.5°F), alongside lows between 25.3°C (77.5°F) and 26.7°C (80.1°F). With an average rainfall of 134mm (5.28") in April to a colossal 302mm (11.89") in May, the indoor festivities might have an upper hand over outside ventures. The figure of daylight hours that course around 12.1 to 12.4 hours direct towards plentiful natural illumination, while the sunshine hours maintenance from 9.1 to 9 hours says that some outdoor activities are still feasible.
Summer weather in Unawatuna
The months from June to August depict the essence of summer in Unawatuna, with temperature highs of 28.8°C (83.8°F) to 28.3°C (82.9°F) and lows hanging around 26.6°C (79.9°F) to 25.9°C (78.6°F). Correspondingly, the rainfall rises in June, then gradually decreases from 250mm (9.84") to 235mm (9.25") in August. The daylight duration keeps a steady mark of 12.5 to 12.3 hours. Still, the plummeted sunshine days' plunging from 1 to 2.3, intertwined with a UV index at 7, provide an overview of a typical summer.
Autumn weather in Unawatuna
The autumn season signifies stability in Unawatuna with highs from 28.3°C (82.9°F) to 28.8°C (83.8°F) and lows between 25.8°C (78.4°F) to 26.6°C (79.9°F). The rainfall decreases from 222mm (8.74") in September to 194mm (7.64") in November, alongside decreasing rainfall days, emphasizing a gradual dry transition in the surroundings. With the daylight and sunshine hours at 12 to 11.9 hours and 8.5 to 7.2 hours respectively, Autumn is indeed full of varied weather elements.
Winter weather in Unawatuna
Winter in Unawatuna, from December, is characterized by a stable high temperature of 29.2°C (84.6°F) and low of 24.8°C (76.6°F). The declining rainfall amount from 179mm (7.05") in November to 114mm (4.49") in December indicates a drying weather transition. As the holidays approach, 11.8 hours of daylight, coupled with 7 hours of sunshine and a UV index of 7, proposes a uniquely tropical winter experience.
Weather in January
Unawatuna's weather in January is characterized by moderate rainfall and overall warmth, setting a tone for the year in Sri Lanka. Prevailing winds move at an average speed of 7.8km/h (4.8mph) and the town experiences 12.8 sunshine days, conducive for most outdoor activities. Weather in January »
Weather in February
The weather in February in Unawatuna, Sri Lanka shows a gradual increase in temperature from last month. The slight rise contributes to the overall tropical experience, encouraging the growth of Sri Lanka's vibrant flora. An uptick to 16.3 rainfall days averages the precipitation, a clear indication of the region's seasonal changes. Weather in February »
Weather in March
As the heat rises in March in Unawatuna, Sri Lanka, locals and tourists alike adapt to the changing weather conditions. With the highest temperature climbing to 30.3°C (86.5°F) and 21.3 rainfall days on average, the region enters its hot season traditionally. Weather in March »
Weather in April
April in Unawatuna, Sri Lanka indicates a continuation of the hot season with the highest temperature holding at 30.3°C (86.5°F). This month marks an increase in precipitation to 134mm (5.28"), evident in both the swelling vegetation and increased river levels. Weather in April »
Weather in May
The weather in May in Unawatuna stands out for its significant rise in precipitation to 302mm (11.89"), marking it as the wettest month of the year. Despite the increase in rainfall, the temperatures remain relatively stable, maintaining the region's tropical charm. Weather in May »
Weather in June
In June, Unawatuna experiences a slight decrease in rainfall, a welcoming relief from May's peak rainfall. The wind speeds surge this month to 20.2km/h (12.6mph), a year's highest, making the coastal town a favorite amongst wind-sport enthusiasts. Weather in June »
Weather in July
July's weather in Unawatuna enjoys a slight decrease in rainfall from 250mm (9.84") to 188mm (7.4"), inching the region closer to the dry season. This month vibrantly contrasts with June, thanks to the reduction in rainfall days to 25.7. Weather in July »
Weather in August
The weather in August in Unawatuna, Sri Lanka show a rise in rainfall as compared to July, but the overall ambiance remains tropical and inviting. Distinctive sea breezes complement the average atmospheric pressure of 1009.6 mb, thus creating an enticing platform for a variety of water sports. Weather in August »
Weather in September
September’s weather in Unawatuna, Sri Lanka witnesses a subtle decrease in precipitation from 235mm (9.25") to 222mm (8.74"). As the region steadily progresses towards the dry season. The mild weather, consistent sea temperatures provide a pleasant atmosphere for beachfront activities. Weather in September »
Weather in October
October marks the commencement of the dry season in Unawatuna, Sri Lanka with a significant reduction in rainfall from 222mm (8.74") to 194mm (7.64"). Weather in this month continues to be pleasant, continuing the seamless transition from September. Weather in October »
Weather in November
November in Unawatuna presages the proximity of the year's end with a marked decrease in precipitation to 179mm (7.05"). This change in weather provides an impetus for a wider range of outdoor activities. From October, a drop in rainfall is seen, coupled with a slight change in temperature. Weather in November »
Weather in December
As the last month of the year, December's weather in Unawatuna maintains a pleasing equilibrium of rain and sunshine. The average wind speed drops to 9.4km/h (5.8mph), providing calm days perfect for coastal fun. Although some reduction in daylight hours occurs, they still linger around 11.8 hours, ensuring extended outdoor activities. Weather in December »
Updated: Aug 23, 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
What is the driest month?
The month with the least rainfall is January, when the rain falls for 14.8 days and typically collects 38mm (1.5") of precipitation.
How many days does it rain?
Throughout the year, there are 286.9 rainfall days, and 1974mm (77.72") of precipitation is accumulated.
When is the sea coldest?
January, February, June through October and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater.
What is the month with the highest UV index?
The months with the highest UV index are January through April, June through August, October through December, with an average maximum UV index of 7.
What is the least humid month?
February and March, with an average relative humidity of 77%, are the least humid months.
What is the warmest month?
During March and April, Unawatuna registers its highest temperatures, averaging a high of 30.3°C (86.5°F).
What month is the sea warmest?
The month with the warmest seawater in Unawatuna is April, with an average sea temperature of 30°C (86°F).
What month has the most sunshine?
The month with the most sunshine in Unawatuna is April, with an average of 9.3h of sunshine.
What is the wettest month?
The month with the most rainfall is May, when the rain falls for 27.7 days and typically aggregates up to 302mm (11.89") of precipitation.
When is the lowest UV index?
May and September, with an average maximum UV index of 6, are months with the lowest UV index.
What are the most humid months?
June and September, with an average relative humidity of 82%, are most humid months in Unawatuna.
When are the longest days?
With an average of 12h and 30min of daylight, June has the longest days of the year.
What part of the year is the coldest in Unawatuna?
During August and September, Unawatuna experiences its coldest period, with an average high-temperature of 28.3°C (82.9°F).
What is the month with the shortest days in Unawatuna?
With an average of 11h and 48min of daylight, December has the shortest days of the year.
Is there Daylight Saving Time (DST) in Unawatuna?
Unawatuna does not utilize Daylight Saving Time (DST). +0530 timezone is used over the entire year.
What is the month with the least sunshine?
With an average of 7h of sunshine, December has the least sunshine of the year.
Average temperature
Unawatuna, Sri Lanka
The warmest months (with the highest average high temperature) are March and April (30.3°C).
The months with the lowest average high temperature are August and September (28.3°C).
The month with the highest average low temperature is May (26.7°C).
The coldest month (with the lowest average low temperature) is January (24°C).
Average pressure
Unawatuna, Sri Lanka
- Average pressure in January:
1011.4mbar - Average pressure in February:
1011.1mbar - Average pressure in March:
1010.8mbar - Average pressure in April:
1009.9mbar - Average pressure in May:
1008.9mbar - Average pressure in June:
1009.2mbar
- Average pressure in July:
1009.2mbar - Average pressure in August:
1009.6mbar - Average pressure in September:
1010.2mbar - Average pressure in October:
1010.2mbar - Average pressure in November:
1009.8mbar - Average pressure in December:
1010.2mbar
The month with the highest atmospheric pressure is January (1011.4mbar).
The month with the lowest atmospheric pressure is May (1008.9mbar).
Average wind speed
Unawatuna, Sri Lanka
- Average wind speed in January:
7.8km/h - Average wind speed in February:
8km/h - Average wind speed in March:
8.7km/h - Average wind speed in April:
10km/h - Average wind speed in May:
16.3km/h - Average wind speed in June:
20.2km/h
- Average wind speed in July:
19.9km/h - Average wind speed in August:
19.5km/h - Average wind speed in September:
17.3km/h - Average wind speed in October:
13.5km/h - Average wind speed in November:
9.8km/h - Average wind speed in December:
9.4km/h
The windiest month (with the highest average wind speed) is June (20.2km/h).
The calmest month (with the lowest average wind speed) is January (7.8km/h).
Average humidity
Unawatuna, Sri Lanka
The months with the highest relative humidity are June and September (82%).
The months with the lowest relative humidity are February and March (77%).
Average rainfall
Unawatuna, Sri Lanka
- Average rainfall in January:
38mm - Average rainfall in February:
50mm - Average rainfall in March:
68mm - Average rainfall in April:
134mm - Average rainfall in May:
302mm - Average rainfall in June:
250mm
- Average rainfall in July:
188mm - Average rainfall in August:
235mm - Average rainfall in September:
222mm - Average rainfall in October:
194mm - Average rainfall in November:
179mm - Average rainfall in December:
114mm
The wettest month (with the highest rainfall) is May (302mm).
The driest month (with the least rainfall) is January (38mm).
Average rainfall days
Unawatuna, Sri Lanka
- Average rainfall days in January:
14.8 days - Average rainfall days in February:
16.3 days - Average rainfall days in March:
21.3 days - Average rainfall days in April:
26.2 days - Average rainfall days in May:
27.7 days - Average rainfall days in June:
28 days
- Average rainfall days in July:
25.7 days - Average rainfall days in August:
27.7 days - Average rainfall days in September:
24.5 days - Average rainfall days in October:
26.3 days - Average rainfall days in November:
26.3 days - Average rainfall days in December:
22.1 days
The month with the highest number of rainy days is June (28 days).
The month with the least rainy days is January (14.8 days).
Average sea temperature
Unawatuna, Sri Lanka
The best month for swimming (with the highest average sea temperature) is April (30°C).
The coldest months (with the lowest average sea temperature) are January, February, June, July, August, September, October and December (28°C).
Average daylight / Average sunshine
Unawatuna, Sri Lanka
- Average daylight in January:
11h and 5min - Average daylight in February:
11h and 5min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 2min - Average daylight in May:
12h and 2min - Average daylight in June:
12h and 3min
- Average daylight in July:
12h and 2min - Average daylight in August:
12h and 2min - Average daylight in September:
12h and 1min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 5min - Average daylight in December:
11h and 5min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 48min).
- Average sunshine in January:
9h and 0min - Average sunshine in February:
9h and 0min - Average sunshine in March:
9h and 1min - Average sunshine in April:
9h and 2min - Average sunshine in May:
9h and 0min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
8h and 2min - Average sunshine in August:
8h and 1min - Average sunshine in September:
8h and 3min - Average sunshine in October:
8h and 1min - Average sunshine in November:
7h and 1min - Average sunshine in December:
7h and 0min
The month with the most sunshine is April (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days
Unawatuna, Sri Lanka
- Average sunshine days in January:
12.8 days - Average sunshine days in February:
9.3 days - Average sunshine days in March:
6.9 days - Average sunshine days in April:
1.5 days - Average sunshine days in May:
1.4 days - Average sunshine days in June:
1 days
- Average sunshine days in July:
3.3 days - Average sunshine days in August:
2.3 days - Average sunshine days in September:
2.4 days - Average sunshine days in October:
1.7 days - Average sunshine days in November:
2.4 days - Average sunshine days in December:
6.4 days
The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is June (1 days).
Average UV index
Unawatuna, Sri Lanka
The months with the highest UV index are January, February, March, April, June, July, August, October, November and December (UV index 7).
The months with the lowest UV index are May and September (UV index 6).
Average cloud cover
Unawatuna, Sri Lanka
The month with the most cloud cover is June (Cloud cover 51).
The month with the least cloud cover is February (Cloud cover 26).
Average visibility
Unawatuna, Sri Lanka
The months with the highest visibility are January, February, March, April, June and December (10km).
The months with the lowest visibility are May, July, August, September, October and November (9km).
Unawatuna, Sri Lanka
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