April weather forecast
Bukit Mertajam, Malaysia

The month of April in Bukit Mertajam is characterized by a significant increase in rainfall from 95mm (3.74") in March to 139mm (5.47"). The amount of daylight received persists at 12.2 hours, similar to March. The weather is predominantly rainy, often dampening the surroundings. However, despite higher rainfall, temperatures remain high, contributing to the overall humid climate. The city's weather in April embodies a true tropical rainforest climate with heavy showers and high temperatures.

Temperature

April's weather in Bukit Mertajam displays an average high-temperature of a still hot 32.3°C (90.1°F), slightly varied from March's 32.4°C (90.3°F). In Bukit Mertajam, the nighttime temperature averages to a warm 24.8°C (76.6°F) during April.

Heat index

The heat index in April is estimated at a burning hot 45°C (113°F). On guard: Heat exhaustion and heat cramps are predicted. Heatstroke is a potential hazard with continuous physical effort.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a numerical representation of warmth when taking temperature and moisture levels into account. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in April is 80%.

Rainfall

In Bukit Mertajam, in April, during 26.9 rainfall days, 139mm (5.47") of precipitation is typically accumulated. Throughout the year, there are 294.8 rainfall days, and 1325mm (52.17") of precipitation is accumulated.

Sea temperature

In Bukit Mertajam, in April, the average water temperature is 30.3°C (86.5°F).
Note: For many swimmers, waters with temperatures rising above 30°C (86°F) might not be as cooling.

Daylight

In April, the average length of the day in Bukit Mertajam is 12h and 14min.
On the first day of the month, sunrise is at 7:16 am and sunset at 7:27 pm. On the last day of April, sunrise is at 7:06 am and sunset at 7:24 pm +08.

Sunshine

In April, the average sunshine is 8.7h.

UV index

The months with the highest UV index are January through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 7 in April translates into the following instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. 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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.