April weather forecast
Umatac, GU

The weather in Umatac, Guam throughout April involves a significant increase in rainfall, notching up at 2.44" (62mm) from the preceding month's low. This heightened precipitation heralds the imminent arrival of the rainy season. Bountiful sunshine hours and warm temperatures endorse the lush tropical surroundings with abundant daylight. Comparatively mild winds counterpoint the increase in rain showers. Persistent UV radiation and visibility remain stable, preserving the overall congenial weather scenario.

Temperature

As Umatac transitions into April, the average high-temperature stands at a still warm 82.9°F (28.3°C), offering little variation from the preceding month. Umatac sustains a near constant temperature throughout April, with nighttime averages of 81.1°F (27.3°C).

Heat index

For April, the heat index is estimated at a tropical 91.4°F (33°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
When assessing, remember that heat index measurements are for light winds and shaded spots. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. 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 remain especially vital for babies and toddlers. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

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

Rainfall

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

Daylight

In Umatac, 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 April, the average sunshine 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 of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In April, a regular UV index of 7 translates into these guidelines:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Stay sun-safe with clothing that is both closely woven and worn loosely.