April weather forecast
Hải Lăng, Vietnam

April sees a significant leap in temperatures as Hải Lăng braces for the summer. This can be felt quite drastically when compared with the weather in March. The climb in temperature is accompanied by an extended daylight period. April receives about 12mm (0.47") rainfall, spread over 11 days, indicative of the city transitioning into the wet season. Wind speeds remain relatively stable, providing a respite to the otherwise warm weather.

Temperature

A soft shift in the average high-temperature is noticeable in April, transitioning from a moderately hot 25.4°C (77.7°F) in March to a still warm 29.5°C (85.1°F). In Hải Lăng, April nights witness a steady temperature drop to a pleasant 22°C (71.6°F).

Heat index

The average heat index in April is calculated to be a sweltering 36°C (96.8°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

With an average relative humidity of 81%, April is the most humid month.

Rainfall

In Hải Lăng, Vietnam, during April, the rain falls for 11 days and regularly aggregates up to 12mm (0.47") of precipitation. Throughout the year, there are 140.7 rainfall days, and 282mm (11.1") of precipitation is accumulated.

Daylight

In April, the average length of the day is 12h and 31min.
On the first day of April in Hải Lăng, Vietnam, sunrise is at 05:45 and sunset at 18:04. On the last day of the month, sunrise is at 05:26 and sunset at 18:10 +07.

Sunshine

In April, the average sunshine is 7.8h.

UV index

April through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 7 in April leads to these guidelines:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Enhance your sun protection with tightly woven, yet airy clothing.