April weather forecast
Cổ Loa, Vietnam

April in Cổ Loa, Vietnam, is a hot spring month, with an average temperature varying between 21.8°C (71.2°F) and 30.8°C (87.4°F).

Temperature

As Cổ Loa transitions into April, a marginal rise in the average high-temperature is observed, moving from a moderately hot 26.8°C (80.2°F) in March to a tropical 30.8°C (87.4°F). Cổ Loa records a mean low-temperature of 21.8°C (71.2°F) in April.

Heat index

April's heat index is evaluated at a very hot 39°C (102.2°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. 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.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In April, the average relative humidity is 77%.

Rainfall

In Cổ Loa, in April, during 14.8 rainfall days, 32mm (1.26") of precipitation is typically accumulated. Throughout the year, there are 181.2 rainfall days, and 595mm (23.43") of precipitation is accumulated.

Daylight

In Cổ Loa, the average length of the day in April 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 18:21 +07.

Sunshine

In Cổ Loa, the average sunshine in April is 7.2h.

UV index

In Cổ Loa, the average daily maximum UV index in April is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for average individuals.
Note: In April, a regular UV index of 6 translates into these guidelines:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.