Last updated: January 18, 2025
The climate of Mangilao, Guam, is classified as tropical rainforest (Koppen-Geiger Af), characterized by consistently warm temperatures throughout the year. The region experiences a minimum temperature of 25°C (77°F) in March, with an average temperature hovering around 27°C (82°F). The warmest month is September, when average maxima reach 30°C (86°F), reflecting the stable and humid conditions typical of this tropical locale. This climate not only supports a rich biodiversity but also influences the daily lives of its residents, creating a unique environmental tapestry.
In Mangilao, Guam, temperature patterns exhibit minimal variation throughout the year, reflecting the region's tropical climate. The minimum temperatures consistently hover around 25-26°C (77-79°F), while average temperatures remain relatively stable at approximately 27-28°C (81-82°F). Notably, the warmest month typically occurs in September, with a maximum temperature of 30°C (86°F), slightly elevating the overall warmth. As the year progresses, April through November sees marginal increases in maximum temperatures, often reaching 29°C (84-86°F), establishing a consistently warm environment ideal for lush vegetation. This stability in temperature emphasizes the tropical rainforest climate of the region, where seasonal changes are more subtle than in temperate zones.
In Mangilao Village, temperatures range from a minimum of 25°C (77°F) in March to a maximum of 30°C (86°F) in September, showcasing a relatively warm climate throughout the year. For more detailed information, you can explore the monthly temperatures in Mangilao Village.
Mangilao, Guam experiences a distinct precipitation pattern characterized by pronounced wet and dry periods. The rainiest months occur from June to October, where rainfall escalates dramatically, peaking in August with an impressive 405 mm (16.0 in). This peak coincides with the region's typhoon season, leading to an extensive number of rainy days, particularly in July and August, each averaging around 30 days of measurable precipitation. Conversely, the year begins with relatively lower precipitation, with January providing 61 mm (2.4 in) and only 15 rainy days, gradually increasing toward the mid-year.
In addition to the significant rainfall, the variability in monthly precipitation reflects the impact of tropical climatic conditions on Mangilao's environment. Notably, October follows closely behind August and September with 356 mm (14.0 in), sustaining the elevated precipitation levels into the autumn months. The dryest month is March, recording just 53 mm (2.1 in), showing the stark contrast during the transition to the wetter season. Overall, the annual precipitation total underscores the rich biodiversity supported by this tropical rainforest climate, with rainfall playing a crucial role in maintaining the lush landscapes of Guam.
In Mangilao, Guam, sunshine duration shows a notable seasonal trend, with increasing hours of sunlight as the year progresses toward summer. Beginning with 232 hours in January, the hours gradually rise, peaking in May at 336 hours. This steady increase highlights the transition from the cooler winter months into the vibrant summer season, where longer daylight hours contribute to the region's lush tropical environment. By March and April, residents enjoy 316 and 314 hours of sunshine respectively, signaling the onset of warmer weather and vibrant growth in the local flora.
As summer approaches, the trend persists, although a slight decrease in sunshine is observed during the peak of the rainy season in August, with only 269 hours of sunshine. This reduction is likely due to increased cloud cover and precipitation typical of the region during this time. The warmth of the summer is contrasted by shorter sunshine hours in the autumn months of September and October, which record 259 and 263 hours respectively. Despite these fluctuations, total sunshine remains relatively high throughout the year, with an average that supports the rich biodiversity and lush landscapes characteristic of Guam's tropical rainforest climate.
In Mangilao, Guam, the UV Index remains consistently high throughout the year, reflecting the region's tropical climate and proximity to the equator. The UV Index reaches a peak of 15 during both March and April, classified as extreme and necessitating cautious sun exposure. During these months, a mere 10 minutes of unprotected exposure can lead to skin damage, underscoring the importance of protective measures such as sunscreen, clothing, and shade to mitigate health risks associated with intense UV radiation. Transitioning from peak periods, the UV Index remains notably high, with values hovering around 13 to 14 from February to July, maintaining the extreme category that calls for vigilance and proactive sun safety.
As the year progresses into the late summer and autumn months, the UV Index slightly fluctuates but remains in the extreme exposure category. Notably, September exhibits a return to a peak 15, before tapering down to 12 in November and 11 in December. Despite these seasonal variations, the consistently high UV levels emphasize the need for year-round sun protection in Mangilao. Residents and visitors alike are advised to remain aware of these UV conditions as they can significantly impact health, particularly for those engaging in outdoor activities.
UV Risk Categories
In Mangilao, Guam, daylight duration showcases a consistent pattern throughout the year, with only slight variations that reflect the region's tropical latitude. The year begins with 11 hours of daylight in both January and February, maintaining stable lighting conditions. As spring approaches, daylight extends to 12 hours from March through September, allowing ample time for outdoor activities and contributing to the vibrant ecosystems typical of the area. This consistency in daylight hours is characteristic of equatorial regions, where drastic fluctuations in light are rare.
As the year transitions to autumn, daylight begins to shorten again, dropping back to 11 hours in October and remaining at this duration through the end of December. This cyclical pattern underscores the steady rhythm of life in Mangilao, where residents can rely on a reliable amount of daylight for their daily activities. The equilibrium in daylight hours throughout the year aids in promoting a stable climate that supports the lush tropical environment, showcasing the harmonious link between light, climate, and biodiversity in Guam.
Mangilao Village, Guam experiences a tropical climate characterized by warm temperatures and distinct wet and dry seasons. Average temperatures range from 27°C (81°F) in the cooler months (January to March) to around 28°C (82°F) during the warmer months. Precipitation peaks in July and August, with August receiving an average of 405 mm (16.0 in), while sunshine is abundant from March to May, with over 300 hours of sunlight each month. Overall, Mangilao maintains a warm and humid atmosphere throughout the year, making it ideal for those who enjoy tropical conditions. For more detailed information, visit Mangilao Village climate.
In conclusion, the climate of Mangilao, Guam, characterized by its warm temperatures, substantial precipitation, high UV index, and stable daylight duration, offers a unique environment that profoundly influences both the local ecosystem and the lifestyle of its residents. The tropical rainforest climate ensures a rich biodiversity, supported by consistent rainfall and abundant sunshine, while the extreme UV exposure necessitates a cautious approach to outdoor activities throughout the year. Understanding these climatic patterns is essential for both inhabitants and visitors, as they navigate the interplay of nature's elements in this vibrant region. Ultimately, Mangilao stands as a testament to the beauty and complexity of tropical climates, offering endless opportunities for exploration and appreciation of its natural wonders.