April weather forecast
Ngọc Lôi, Vietnam

April is a tropical spring month in Ngọc Lôi, Vietnam, with an average temperature ranging between min 21.8°C (71.2°F) and max 30.8°C (87.4°F).

Temperature

With the onset of April, Ngọc Lôi observes a minor temperature ascent, with the average high-temperature adjusting from March's moderately hot 26.8°C (80.2°F) to a tropical 30.8°C (87.4°F). During April, Ngọc Lôi's temperature averages to an agreeable 21.8°C (71.2°F) at night.

Heat index

During April, the heat index is appraised at a fiery hot 39°C (102.2°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived 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. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In Ngọc Lôi, the average relative humidity in April is 77%.

Rainfall

In Ngọc Lôi, during April, the rain falls for 14.8 days and regularly aggregates up to 32mm (1.26") of precipitation. Throughout the year, there are 181.2 rainfall days, and 595mm (23.43") of precipitation is accumulated.

Daylight

In April, the average length of the day is 12h and 38min.
On the first day of the month, sunrise is at 05:49 and sunset at 18:11. On the last day of April, sunrise is at 05:26 and sunset at 18:20 +07.

Sunshine

The average sunshine in April is 7.2h.

UV index

In April, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index of 6 during April leads to these instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.