Last updated: January 18, 2025
Agat, Guam, is characterized by a tropical rainforest climate according to the Koppen-Geiger classification system (Af). This region experiences consistently warm temperatures throughout the year, with a minimum recorded at 25°C (77°F) in March, an average of 27°C (82°F), and a peak maximum of 30°C (86°F) in September. The stable thermal regime supports a rich biodiversity, making Agat a unique locale for the study of tropical ecosystems.
Agat, Guam, exhibits a stable tropical climate with only minor temperature fluctuations throughout the year. The monthly averages hover around 27°C (81°F) to 28°C (82°F), while temperatures peak at 29°C (84°F) or 30°C (86°F) during the warmer months of April through September. Minimum temperatures typically stabilize at 25°C (77°F), becoming slightly warmer in November and December, where they rise to 26°C (79°F). This consistent warmth, punctuated by subtle seasonal variations, contributes to Agat's lush vegetation and vibrant ecosystems, solidifying its reputation as a tropical paradise.
Agat Village experiences a warm climate, with temperatures ranging from a minimum of 25°C (77°F) in March to a maximum of 30°C (86°F) in September. For more detailed information on monthly temperatures in Agat Village, you can visit monthly temperatures in Agat Village.
Precipitation patterns in Agat, Guam reveal a distinctive wet season characterized by significant rainfall, particularly from June to October. The month of August stands out with a striking 405 mm (16.0 in) of rain, marking it as the wettest month of the year, followed closely by July with 276 mm (10.9 in) and September at 375 mm (14.8 in). These months also record the highest number of rainy days, with July and August experiencing sustained rainfall for nearly the entire month, contributing to the lush tropical landscape typical of this region.
In contrast, the drier months occur from December to March, with precipitation levels dropping to 53 mm (2.1 in) in March and averaging about 61 to 77 mm (2.4 to 3.0 in) during January and February. Despite this variability, rainfall is relatively consistent across the year, with precipitation recorded on approximately 15 to 30 days each month. Such rainfall distribution is crucial for maintaining the vibrant ecosystems of Agat, supporting both its flora and fauna through a blend of moisture and warmth throughout the year.
In Agat, Guam, the sunshine duration exhibits a notable seasonal trend, characterized by an increase in sunlight hours as the year progresses from winter to summer. Starting with 232 hours of sunshine in January, there is a steady ascent through February with 267 hours and reaching a peak in May at 336 hours. This period encompasses the brightest months of the year, where the extended daylight promotes not only a warm climate but also enhances outdoor activities and tourism in the region.
However, as summer transitions to early fall, sunshine hours begin to decline. In June, Agat experiences 319 hours of sun, followed by a gradual decrease, notably in September with only 259 hours. This reduction signifies the approaching wet season and the potential for increased cloud cover. Interestingly, despite the decreased sunlight, months like October and November still yield respectable amounts of sunshine, with 263 hours and 280 hours, respectively. These trends highlight how Agat maintains a relatively sunny environment year-round, despite seasonal variations, ensuring its appeal as a tropical destination.
The UV Index in Agat, Guam, consistently reflects extreme levels of solar radiation throughout the year, underscoring the region’s tropical climate. Starting at a UV Index of 11 in January, a gradual increase leads to a peak of 15 in March and April. This prolonged exposure to high UV levels indicates that safe sun practices are essential for residents and visitors alike, with a dangerously short burn time of just 10 minutes across all months. Notably, even during the slightly lower months of December and January, the UV Index remains critically high, emphasizing the need for protection year-round.
As the year progresses, the UV Index stabilizes at around 13 to 15 from February to September, highlighting the intensity of sunlight during the peak summer months. Although there is slight variation in exposure levels—such as a drop to 12 in November—extreme UV conditions persist, reinforcing the importance of vigilance against sun damage. Overall, the consistency of the UV Index in Agat serves as a crucial reminder for individuals to take precautions, including wearing sunscreen, protective clothing, and seeking shade, to mitigate the risks associated with prolonged sun exposure.
UV Risk Categories
In Agat, Guam, daylight duration remains relatively stable throughout the year, exhibiting minimal variation typical of tropical regions located near the equator. For the first two months, January and February, residents enjoy 11 hours of daylight, providing a consistent yet limited exposure to natural light. As the months progress into spring, daylight begins to extend, peaking at 12 hours from March through September. This period of prolonged sunshine fosters a vibrant atmosphere, ideal for outdoor activities and supporting the region's lush ecology.
As autumn approaches, daylight hours gradually decrease, returning to 11 hours in both October and November, with December also maintaining this shorter daylight duration. This cyclical pattern emphasizes the unique stability of Agat's daylight hours compared to many temperate regions, where daylight varies significantly with the seasons. Overall, the consistent lengths of day throughout the year contribute to the island's allure, allowing for year-round engagement with its stunning natural landscapes and inviting climate.
Agat Village, Guam experiences a tropical climate with warm temperatures year-round, averaging between 27°C (81°F) and 28°C (82°F). The warmest months are typically from June to September, with maximum temperatures reaching up to 30°C (86°F). Precipitation is highest during the summer months, particularly in July and August, with rainfall exceeding 400 mm (16 inches). Despite this, sunshine is abundant throughout the year, peaking in May with 336 hours. For more detailed information, visit Agat Village climate.
In conclusion, Agat, Guam, exemplifies a tropical climate characterized by warm temperatures, significant precipitation, ample sunshine, and high UV exposure throughout the year. The consistent patterns of daylight duration, combined with a stable range of temperatures, promote a lush environment conducive to diverse ecosystems. Despite minor seasonal variations, the extreme UV Index remains a crucial consideration for health and safety, prompting residents and visitors to adopt protective measures. Together, these climatic features highlight Agat's appeal as a vibrant destination, where nature thrives and outdoor activities are plentiful, creating a harmonious balance with its stunning scenery and captivating tropical allure.