April weather forecast
Unawatuna, Sri Lanka

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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. With a stability in sea temperatures at 30°C (86°F) and relative humidity at 78%, encouraging a flourish of marine life. This characteristic is of contrast when juxtaposed with March's slightly moderate rainfall. A notable shift will occur moving into May, considered to be the wettest month of the year in Unawatuna.

Temperature

March and April mark Unawatuna's peak of temperatures, averaging a high-temperature of 30.3°C (86.5°F).

Heat index

The heat index value during April is appraised at a very hot 38°C (100.4°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In Unawatuna, the average relative humidity in April is 78%.

Rainfall

In April, in Unawatuna, the rain falls for 26.2 days. Throughout April, 134mm (5.28") of precipitation is accumulated. Throughout the year, in Unawatuna, there are 286.9 rainfall days, and 1974mm (77.72") of precipitation is accumulated.

Sea temperature

With an average sea temperature of 30°C (86°F), April is the month with the warmest seawater.
Note: It is commonly believed that waters over 30°C (86°F) are not as refreshing for swimming or intense activities.

Daylight

The average length of the day in April is 12h and 16min.
On the first day of April, sunrise is at 06:07 and sunset at 18:18. On the last day of the month, sunrise is at 05:56 and sunset at 18:16 +0530.

Sunshine

April has the most sunshine of the year in Unawatuna, with an average of 9.3h of sunshine.

UV index

January through April, June through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Unawatuna. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In April, a regular UV index of 7 translates into these guidelines:
Resist overexposure. Safeguarding from solar damage is indispensable. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.
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Frequently asked questions

What is the warmest month in Unawatuna?

The months of March and April are noted for their peak temperatures in Unawatuna, with an average high-temperature of 30.3°C (86.5°F).

How hot does it get in Unawatuna in April?

An average high-temperature, in April, in Unawatuna, is 30.3°C (86.5°F) and the average low-temperature is 26.4°C (79.5°F). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in April is appraised at 38°C (100.4°F).

What is the average humidity in April in Unawatuna?

In April, the average relative humidity is 78%.

How much does it rain in Unawatuna in April?

In Unawatuna, in April, during 26.2 rainfall days, 134mm (5.28") of precipitation is typically accumulated.

What month is the sea warmest in Unawatuna?

With an average sea temperature of 30°C (86°F), April is the month with the warmest seawater in Unawatuna, Sri Lanka.

How warm is the water in April in Unawatuna?

In April, the average sea temperature is 30°C (86°F). For swimming, other intense water activities, temperature above 30°C (86°F) is arguably unpleasant, as the water cooling effect is missing.

What is the average length of the day in April in Unawatuna?

The average day length in April in Unawatuna is 12h and 16min.

When are sunrise and sunset in April in Unawatuna?

On the first day of April in Unawatuna, Sri Lanka, sunrise is at 06:07 and sunset at 18:18. On the last day of the month, sunrise is at 05:56 and sunset at 18:16 +0530.

What month has the most sunshine in Unawatuna?

The month with the most sunshine is April, with an average of 9.3h of sunshine.

How long on average sun shines in April in Unawatuna?

The average sunshine duration in April in Unawatuna, Sri Lanka, is 9.3h.

What is the month with the highest UV index in Unawatuna?

The months with the highest UV index in Unawatuna, Sri Lanka, are January through April, June through August, October through December, with an average maximum UV index of 7.

How high is the UV index in April in Unawatuna?

The average daily maximum UV index in April is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in April
Unawatuna, Sri Lanka

Average temperature in April - Unawatuna, Sri Lanka
  • Average high temperature in April: 30.3°C

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).

  • Average low temperature in April: 26.4°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).

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Average pressure in April
Unawatuna, Sri Lanka

Average pressure in April - Unawatuna, Sri Lanka
  • Average pressure in April: 1009.9mbar

The month with the highest atmospheric pressure is January (1011.4mbar).
The month with the lowest atmospheric pressure is May (1008.9mbar).

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Average wind speed in April
Unawatuna, Sri Lanka

Average wind speed in April - Unawatuna, Sri Lanka
  • Average wind speed in April: 10km/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).

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Average humidity in April
Unawatuna, Sri Lanka

Average humidity in April - Unawatuna, Sri Lanka
  • Average humidity in April: 78%

The months with the highest relative humidity are June and September (82%).
The months with the lowest relative humidity are February and March (77%).

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Average rainfall in April
Unawatuna, Sri Lanka

Average rainfall in April - Unawatuna, Sri Lanka
  • Average rainfall in April: 134mm

The wettest month (with the highest rainfall) is May (302mm).
The driest month (with the least rainfall) is January (38mm).

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Average rainfall days in April
Unawatuna, Sri Lanka

Average rainfall days in April - Unawatuna, Sri Lanka
  • Average rainfall days in April: 26.2 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).

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Average sea temperature in April
Unawatuna, Sri Lanka

Average sea temperature in April - Unawatuna, Sri Lanka
  • Average sea temperature in April: 30°C

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).

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Average daylight in April /
Average sunshine in April
Unawatuna, Sri Lanka

Average daylight in April / Average sunshine in April - Unawatuna, Sri Lanka
  • Average daylight in April: 12h and 2min

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 April: 9h and 2min

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).

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Average sunshine days in April
Unawatuna, Sri Lanka

Average sunshine days in April - Unawatuna, Sri Lanka
  • Average sunshine days in April: 1.5 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is June (1 days).

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Average UV index in April
Unawatuna, Sri Lanka

Average UV index in April - Unawatuna, Sri Lanka
  • Average UV index in April: 7

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).

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Average cloud cover in April
Unawatuna, Sri Lanka

Average cloud cover in April - Unawatuna, Sri Lanka
  • Average cloud cover in April: 38

The month with the most cloud cover is June (Cloud cover 51).
The month with the least cloud cover is February (Cloud cover 26).

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Average visibility in April
Unawatuna, Sri Lanka

Average visibility in April - Unawatuna, Sri Lanka
  • Average visibility in April: 10km

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).

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Unawatuna, Sri Lanka

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