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 onset in Lao Cai sees an average high-temperature of a tropical 31.2°C (88.2°F), exhibiting a slight fluctuation from the previous month. April nights see a notable contrast from daytime highs, with the nighttime temperature averaging at an enjoyable 18.1°C (64.6°F).

Heat index

In April, the average heat index is estimated at a sweltering 36°C (96.8°F). More safety actions are required, heat exhaustion and heat cramps are probable. Long-term activity may precipitate heatstroke.
It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.

Humidity

In Lao Cai, the average relative humidity in April is 64%.

Rainfall

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

Daylight

The average length of the day in April in Lao Cai 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

The month with the most sunshine in Lao Cai is April, 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 risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index, 6 during April, leads to the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Enhance your sun protection with tightly woven, yet airy clothing.