Last updated: January 18, 2025
Piti, Guam, is characterized by a tropical rainforest climate (Köppen-Geiger class Af), where consistently warm temperatures prevail throughout the year. Monthly temperature records reveal a minimum of 25°C (77°F) during March and an average hovering around 27°C (82°F), culminating in a maximum temperature of 30°C (86°F) in September. This stable temperature range fosters a lush, vibrant environment, making Piti a unique tropical paradise with a climate that supports diverse ecosystems and rich biodiversity.
The temperature patterns in Piti, Guam, exhibit a remarkable consistency characteristic of its tropical climate. Throughout the year, minimum temperatures largely remain steady at 25°C (77°F) to 26°C (79°F), while average temperatures fluctuate only slightly, typically around 27°C (81°F) to 28°C (82°F). The peak temperatures are observed from April to September, with maximum values reaching 29°C (84°F) in most months and peaking at 30°C (86°F) in September. This subtle seasonal variation illustrates a warm and stable environment that supports lush ecosystems, with minor increases in heat during the mid-year months leading into the warmer peak of late summer.
Piti Village experiences a warm climate, with minimum temperatures averaging around 25°C (77°F) in March and peaking at a maximum of 30°C (86°F) in September. For more detailed monthly temperatures, refer to monthly temperatures in Piti Village.
Piti, Guam, experiences a distinct seasonal pattern in precipitation that aligns with its tropical climate. The year begins with relatively moderate rainfall, with January receiving 61 mm (2.4 in) and February slightly increasing to 77 mm (3.0 in). As the calendar progresses into spring, April marks a notable rise in precipitation to 94 mm (3.7 in), followed by a variable rainfall amount in May at 78 mm (3.1 in). This gradual buildup in rainfall leads into the summer months, where June witnesses a significant surge to 159 mm (6.3 in), indicating the onset of Guam's wetter season.
The summer months of July and August are characterized by extreme precipitation, with July recording 276 mm (10.9 in) and August peaking at an impressive 405 mm (16.0 in), making it the wettest month of the year. This deluge continues into September and October, with 375 mm (14.8 in) and 356 mm (14.0 in), respectively. By the end of the year, rainfall begins to taper off, with November reporting 202 mm (8.0 in) and December at 105 mm (4.1 in). Overall, Piti experiences a total rainfall of about 1,500 mm (59 in) annually, with precipitation spread across an increasing number of rainy days, particularly notable in the peak of the wet season where rainfall events occur almost daily.
In Piti, Guam, sunshine duration follows a clear seasonal trajectory, showcasing a steady rise from the winter months into summer. January begins with 232 hours of sunshine, gradually increasing through February with 267 hours. March marks a significant uptick to 316 hours, as the region transitions toward the warmer months. April and May continue this upward trend, recorded at 314 hours and 336 hours of sunshine, respectively, culminating in May as the sunniest month of the year. This period not only highlights the increasing availability of sunlight but also correlates with the dry season, where longer, clearer days enhance outdoor activities and tourism.
As summer approaches, sunshine hours remain abundant but show a slight decline during the later months. June features 319 hours, July records 300 hours, and both August and September bring 269 hours and 259 hours, respectively. These months coincide with the peak of the rainy season, leading to cloudier skies and reduced sunlight exposure. Interestingly, October and November rebound with 263 hours and 280 hours, respectively, while December sees a slight decrease to 286 hours. This cyclical pattern illustrates how Piti balances periods of ample sunshine with seasonal rain, creating a climate that supports both vibrant ecosystems and leisure activities throughout the year.
Piti, Guam experiences an exceptionally high UV Index throughout the year, with values consistently categorized as extreme. The UV Index starts at 11 in January and escalates to a peak of 15 in both March and April, indicating an intense risk of harm from unprotected sun exposure. During this time, the recommended burn time is just 10 minutes, underscoring the need for adequate sun protection measures such as sunscreen, hats, and clothing. February also sees a high index of 13, creating a continuing trend of hazardous UV levels as the region transitions into spring.
As the year progresses into summer and fall, the UV Index remains consistently high, fluctuating between 13 and 15 from May through September. July and August maintain a 14, indicating only a slight decrease in UV intensity. By October, the index slightly drops to 13, followed by 12 in November and returning to 11 in December. Despite these slight variations, the persistent extreme levels highlight the importance of sun safety year-round, particularly in a location with such intense sunlight exposure as Piti, Guam. Residents and visitors are strongly advised to remain vigilant in protecting their skin against the pervasive effects of UV radiation.
UV Risk Categories
In Piti, Guam, daylight duration exhibits a relatively stable pattern throughout the year, with only minor fluctuations. January and February enjoy 11 hours of daylight, providing a brief period of slightly shorter days as the year begins. As spring approaches, daylight extends to 12 hours in March, continuing through April, May, and the summer months of June, July, August, and September. This consistent 12-hour duration offers ample opportunity for outdoor activities, exploration, and enjoying the natural beauty of the island.
As the year winds down, daylight begins to taper off again, returning to 11 hours in October, which remains consistent throughout November and December. This cyclical transition emphasizes the minimal variation in daylight in Piti compared to more temperate regions, where seasonal changes can be much more pronounced. The relatively consistent daylight duration, combined with Piti's warm climate, creates an inviting environment for residents and visitors alike to enjoy the island's picturesque scenery and vibrant cultures throughout the year.
The climate in Piti Village, Guam, is characterized by warm temperatures year-round, with averages ranging from 27°C (81°F) in the cooler months to 28°C (82°F) in the warmer months. Precipitation peaks during the summer, with August receiving an average of 405 mm (16.0 in), while January is relatively drier with 61 mm (2.4 in). Sunshine hours are abundant, especially in March and May, where residents can enjoy up to 336 hours of sunlight. Overall, Piti Village experiences a tropical maritime climate, ideal for outdoor activities year-round. For more details, visit Piti Village climate.
In summary, Piti, Guam, boasts a unique tropical climate characterized by consistently warm temperatures, a varied yet intense precipitation pattern, high UV Index levels, and stable daylight durations throughout the year. With average annual temperatures ranging between 25°C and 30°C, combined with significant rainfall during the summer months, the region supports rich ecosystems and vibrant outdoor activities. The persistent extreme UV Index reinforces the importance of sun safety for residents and visitors. Meanwhile, the relatively stable daylight duration enhances the island's appeal, allowing for extended periods of exploration and enjoyment. Overall, Piti presents a captivating environment where nature thrives under the embracing warmth of the tropics.