April weather forecast
Kaduwela, Sri Lanka

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Weather in April

April in Kaduwela, Sri Lanka is known for its humid and warm atmosphere. As the rainfall doubles from the previous month to reach 137mm (5.39"), the city sets a brisk pace for the upcoming monsoon season. The shift in weather dynamics is perhaps a prelude to the impending monsoons. Daylight hours increase slightly, countering the gloomy effect of the increasing cloud cover and rain. Though the city gears up for heavier rainfall, the spirited aura of Kaduwela remains intact.

Temperature

March and April are the warmest months, with an average high-temperature of 31.8°C (89.2°F).

Heat index

The heat index for April is calculated to be a blisteringly hot 42°C (107.6°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.

Humidity

The average relative humidity in April is 77%.

Rainfall

In April, the rain falls for 25.4 days. Throughout April, 137mm (5.39") of precipitation is accumulated. In Kaduwela, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

The average length of the day in April is 12h and 17min.
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 18:18 +0530.

Sunshine

The average sunshine in April is 8.9h.

UV index

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In April, the UV index of 7 transforms into the following advice:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. During bright days, sunglasses that offer UVA and UVB defense are recommended.

Frequently asked questions

What are the warmest months?

March and April are characterised by peak temperatures, with an average high of 31.8°C (89.2°F).

How hot is it in April?

An average high-temperature, in April, in Kaduwela, is 31.8°C (89.2°F) and the average low-temperature is 25.8°C (78.4°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in April is calculated to be 42°C (107.6°F).

What is the average humidity in April?

In April, the average relative humidity is 77%.

How much does it rain in April?

In Kaduwela, in April, during 25.4 rainfall days, 137mm (5.39") of precipitation is typically accumulated.

How many hours of daylight does Kaduwela have in April?

In April, the average day length is 12h and 17min.

When 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 18:18 +0530.

How many hours of sunshine does Kaduwela have in April?

In April, the average sunshine duration is 8.9h.

What are the months with the highest UV index in Kaduwela?

The months with the highest UV index are January through April, July, September, November and December, with an average maximum UV index of 7.

What is the UV index intensity in April in Kaduwela?

In Kaduwela, the average daily maximum UV index in April is 7. A UV Index estimate of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.

Average temperature in April
Kaduwela, Sri Lanka

Average temperature in April - Kaduwela, Sri Lanka
  • Average high temperature in April: 31.8°C

The warmest months (with the highest average high temperature) are March and April (31.8°C).
The months with the lowest average high temperature are July and August (28.9°C).

  • Average low temperature in April: 25.8°C

The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is January (23.1°C).

Average pressure in April
Kaduwela, Sri Lanka

Average pressure in April - Kaduwela, Sri Lanka
  • Average pressure in April: 1009.7mbar

The month with the highest atmospheric pressure is January (1011.6mbar).
The month with the lowest atmospheric pressure is May (1008.6mbar).

Average wind speed in April
Kaduwela, Sri Lanka

Average wind speed in April - Kaduwela, Sri Lanka
  • Average wind speed in April: 8.6km/h

The windiest month (with the highest average wind speed) is June (15.1km/h).
The calmest month (with the lowest average wind speed) is March (8km/h).

Average humidity in April
Kaduwela, Sri Lanka

Average humidity in April - Kaduwela, Sri Lanka
  • Average humidity in April: 77%

The months with the highest relative humidity are June, July and August (83%).
The months with the lowest relative humidity are January and February (74%).

Average rainfall in April
Kaduwela, Sri Lanka

Average rainfall in April - Kaduwela, Sri Lanka
  • Average rainfall in April: 137mm

The wettest month (with the highest rainfall) is June (341mm).
The driest month (with the least rainfall) is January (40mm).

Average rainfall days in April
Kaduwela, Sri Lanka

Average rainfall days in April - Kaduwela, Sri Lanka
  • Average rainfall days in April: 25.4 days

The month with the highest number of rainy days is August (30.2 days).
The month with the least rainy days is January (11.6 days).

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

Average daylight in April / Average sunshine in April - Kaduwela, 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 42min).

  • Average sunshine in April: 8h and 5min

The month with the most sunshine is January (Average sunshine: 9h and 6min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).

Average sunshine days in April
Kaduwela, Sri Lanka

Average sunshine days in April - Kaduwela, Sri Lanka
  • Average sunshine days in April: 2.6 days

The month with the most sunshine days is January (17.2 days).
The months with the least sunshine days are June and August (0.3 days).

Average UV index in April
Kaduwela, Sri Lanka

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

The months with the highest UV index are January, February, March, April, July, September, November and December (UV index 7).
The months with the lowest UV index are May, June, August and October (UV index 6).

Average cloud cover in April
Kaduwela, Sri Lanka

Average cloud cover in April - Kaduwela, Sri Lanka
  • Average cloud cover in April: 40

The month with the most cloud cover is June (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 24).

Average visibility in April
Kaduwela, Sri Lanka

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

The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are May, June, July, August, September, October and November (9km).

Kaduwela, Sri Lanka

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