April weather forecast
Delduwa, Sri Lanka

April

Weather in April

April, the same as March, in Delduwa, Sri Lanka, is another tropical spring month, with temperature in the range of an average high of 30.3°C (86.5°F) and an average low of 26.4°C (79.5°F).

Temperature

In Delduwa, March and April are characterised by the peak of temperatures, recording an average high of 30.3°C (86.5°F).

Heat index

The heat index in April is estimated at a sweltering 38°C (100.4°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Always consider that heat index estimations are for light winds and places in the shade. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In April, the average relative humidity is 78%.

Rainfall

In Delduwa, in April, during 26.2 rainfall days, 134mm (5.28") of precipitation is typically accumulated. In Delduwa, during the entire year, the rain falls for 286.9 days and collects up to 1974mm (77.72") of precipitation.

Daylight

In Delduwa, the average length of the day in April is 12h and 16min.
On the first day of April, sunrise is at 06:08 and sunset at 18:19. On the last day of the month, sunrise is at 05:56 and sunset at 18:17 +0530.

Sunshine

With an average of 9.3h of sunshine, April has the most sunshine of the year in Delduwa.

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. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 7 during April translates into these guidelines:
Shield from overexposure. Defense against sun-related harm is required. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.

Frequently asked questions

What is the hottest time of year?
The months of March and April are noted for their peak temperatures, with an average high-temperature of 30.3°C (86.5°F).
How hot is it in April?
The average high-temperature, in April, in Delduwa, is 30.3°C (86.5°F), while the average low-temperature is 26.4°C (79.5°F). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, in April is estimated at 38°C (100.4°F).
What is the average humidity in April?
In April, the average relative humidity is 78%.
How many days does it rain in April?
In Delduwa, in April, during 26.2 rainfall days, 134mm (5.28") of precipitation is typically accumulated.
How many hours of daylight does Delduwa have in April?
In Delduwa, the average day length in April is 12h and 16min.
What time are sunrise and sunset in April?
On the first day of April, sunrise is at 06:08 and sunset at 18:19. On the last day of the month, sunrise is at 05:56 and sunset at 18:17 +0530.
What month has the most sunshine?
April has the most sunshine of the year, with an average of 9.3h of sunshine.
How long on average sun shines in April?
In Delduwa, the average sunshine duration in April is 9.3h.
What are the months with the highest 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.
What is the UV index reading in April?
In April, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to the Sun's UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in April
Delduwa, 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).

Average pressure in April
Delduwa, 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).

Average wind speed in April
Delduwa, 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).

Average humidity in April
Delduwa, 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%).

Average rainfall in April
Delduwa, 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).

Average rainfall days in April
Delduwa, 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).

Average daylight in April /
Average sunshine in April
Delduwa, 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).

Average sunshine days in April
Delduwa, 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).

Average UV index in April
Delduwa, 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).

Average cloud cover in April
Delduwa, 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).

Average visibility in April
Delduwa, 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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