Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
April
Weather in April
Temperature
March and April represent the warmest period, with an average high-temperature of 30.3°C (86.5°F).Heat index
For most parts of April, the heat index is evaluated at a fiery hot 38°C (100.4°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.Remember that heat index calculations are made for conditions in the shade with light wind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.
Humidity
The average relative humidity in April in Walahanduwa is 78%.Rainfall
In Walahanduwa, during April, the rain falls for 26.2 days and regularly aggregates up to 134mm (5.28") of precipitation. In Walahanduwa, during the entire year, the rain falls for 286.9 days and collects up to 1974mm (77.72") of precipitation.Daylight
In Walahanduwa, the average length of the day in April is 12h and 16min.On the first day of the month, sunrise is at 06:07 and sunset at 18:18. On the last day of April, sunrise is at 05:56 and sunset at 18:16 +0530.
Sunshine
April has the most sunshine of the year, with an average of 9.3h of sunshine.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 threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 7 during April, leads to the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the hottest in Walahanduwa?
How hot does it get in Walahanduwa in April?
What is the average humidity in April in Walahanduwa?
How much does it rain in Walahanduwa in April?
What is the average length of the day in April in Walahanduwa?
When are sunrise and sunset in April in Walahanduwa?
What month has the most sunshine in Walahanduwa?
How long on average sun shines in April in Walahanduwa?
What is the month with the highest UV index in Walahanduwa?
How high is the UV index in April in Walahanduwa?
Average temperature in April
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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
Walahanduwa, 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).
