April weather forecast
Merizo, GU

Entering April, a discernible change in temperature unfolds with the advent of summer. With high levels of warmth and humidity, the overall weather conditions suggest a classic tropical climate. The rise in temperature, peaking at 84.2°F (29°C) provides ample opportunities for visitors and locals alike to engage in various beach activities. Notwithstanding, April retains a reasonably high rainfall ratio, contributing to the overall humid conditions. With an extended duration of daylight, this month is particularly favored by sun enthusiasts.

Temperature

Upon the onset of April, Merizo witnesses an average high-temperature of a still warm 82.9°F (28.3°C), showing a close resemblance to the prior month. Merizo records a slight downturn in temperature to an average of 81.1°F (27.3°C) during April nights.

Heat index

The heat index in April is evaluated at a tropical 91.4°F (33°C). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

The months with the highest humidity are January, March through May, October through December, with an average relative humidity of 78%.

Rainfall

In Merizo, Guam, in April, it is raining for 19.3 days, with typically 2.44" (62mm) of accumulated precipitation. In Merizo, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

In Merizo, the average seawater temperature in April is 82.9°F (28.3°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

The average length of the day in April is 12h and 26min.
On the first day of April, sunrise is at 6:17 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 6:00 am and sunset at 6:36 pm ChST.

Sunshine

In Merizo, the average sunshine in April is 8.5h.

UV index

The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 7 during April translates into the following guidance:
Guard against overexposure. Protection from sun-induced harm is essential. 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. Stay sun-safe with clothing that is both closely woven and worn loosely. Watch out! Reflections from sand and water can surge UV radiation exposure.