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 31.8°C (89.2°F).Heat index
The heat index value during April is estimated at an extremely hot 42°C (107.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
In April, the average relative humidity is 77%.Rainfall
In April, the rain falls for 25.4 days. Throughout April, 137mm (5.39") of precipitation is accumulated. Throughout the year, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.Daylight
The average length of the day in April in Jalthara is 12h and 17min.On the first day of the month, sunrise is at 06:07 and sunset at 18:19. On the last day of April, sunrise is at 05:56 and sunset at 18:17 +0530.
Sunshine
The average sunshine in April is 8.9h.UV index
January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Jalthara. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: In April, the maximum UV index of 7 translates into these guidelines:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the hottest in Jalthara?
How hot is it in Jalthara in April?
What is the average humidity in April in Jalthara?
How much does it rain in Jalthara in April?
How many hours of daylight does Jalthara have in April?
What time are sunrise and sunset in April in Jalthara?
How long on average sun shines in April in Jalthara?
What is the month with the highest UV index in Jalthara?
What is the UV index reading in April in Jalthara?
Average temperature in April
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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
Jalthara, 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).
