April weather forecast
Lao Cai, Vietnam

As March transitions into April in Lao Cai, Vietnam, a significant increase in the rainfall becoming more evident. April carries the distinction of receiving 48mm (1.89") rainfall over 15.5 days, almost twice the volume from the previous March. Concurrently, temperature highs climb further, manifesting the typical tropical climate of this region. While days are awash with intense sunlight, nights bring a contrasting cool ambiance. The trend of increasing precipitation persists as the calendar turns over to May.

Temperature

April's presence records an average high-temperature of a tropical 31.2°C (88.2°F), closely mirroring March's climate. Despite a stark disparity with daily highs, Lao Cai records an average nighttime temperature of 18.1°C (64.6°F) in April.

Heat index

In April, the average heat index is calculated to be a fiery hot 36°C (96.8°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

In April, the average relative humidity is 64%.

Rainfall

In Lao Cai, Vietnam, during April, the rain falls for 15.5 days and regularly aggregates up to 48mm (1.89") of precipitation. In Lao Cai, during the entire year, the rain falls for 188.3 days and collects up to 770mm (30.31") of precipitation.

Daylight

In Lao Cai, the average length of the day in April is 12h and 40min.
On the first day of April, sunrise is at 05:55 and sunset at 18:18. On the last day of the month, sunrise is at 05:31 and sunset at 18:29 +07.

Sunshine

April has the most sunshine of the year, with an average of 10.8h of sunshine.

UV index

March through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A daily high UV index of 6 in April leads to these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.