Last updated: August 21, 2025
In Hagatna Village, Guam, September ushers in a warm, humid climate characterized by an average temperature of 28°C (82°F), with peaks reaching a maximum of 30°C (86°F) and a comfortable minimum of 25°C (77°F). This month experiences substantial precipitation, totaling 375 mm (14.8 in) over 28 rainy days, creating a lush, tropical landscape that thrives in the humid conditions of 81%. Visitors and residents alike can anticipate vibrant greenery, albeit with frequent showers that define the island's captivating September weather.
In September, Hagatna Village, Guam experiences a subtle shift in temperatures, marking the end of the summer's peak warmth. The minimum temperature remains steady at 25°C (77°F), providing a comfortable base that complements the consistent average of 28°C (82°F). However, as the month progresses, temperatures can rise to a refreshing maximum of 30°C (86°F), indicating a slight warming trend compared to the preceding months. This consistent warm weather reinforces the tropical allure of Guam, making it an ideal time for outdoor activities, as days are still long and vibrant. Overall, September's climate transitions smoothly from summer into the early hints of autumn, maintaining the island's characteristic warmth that locals and visitors alike cherish.
In September, Hagatna Village, Guam, experiences a notable shift in precipitation patterns, receiving 375 mm (14.8 in) of rainfall over 28 days. This substantial amount, while slightly lower than the deluge of August, still underscores the region's wet season, which peaks during the summer months. The trend reveals that as the year progresses, rainfall intensifies, especially from June to August, with September maintaining high levels of moisture. Despite a slight decrease from August's 405 mm, September showcases the enduring tropical climate that characterizes the region. With nearly every day of the month marked by rain, the lush landscape remains vibrant, illustrating Guam’s lush tropical allure amid the frequent showers.
In Hagatna Village, Guam, September brings a slight dip in humidity, averaging 81%—a minor decline from the peak levels of 84% seen in the spring months. This month is part of a trend where humidity fluctuates between 80% and 84% throughout the year, with the summer months of June, July, and August consistently registering at 80%. As autumn approaches, humidity levels re-emerge at an average that falls just below the year's highs, showcasing Guam's tropical climate while keeping it comfortably humid for residents and visitors alike. Notably, the year begins and ends with higher humidity levels, suggesting a seasonal rhythm that defines the island's weather patterns.
In September, Hagatna Village, Guam, experiences a notable UV Index of 15, categorizing it under extreme exposure levels, with a burn time of just 10 minutes. This month mirrors the peak intensity noted in March and April, indicating a consistent trend of high UV radiation as the year progresses. With UV indices consistently hovering between 11 and 15 throughout the year, residents and visitors alike should remain vigilant against the sun's powerful rays. As we transition into autumn, maintaining sun safety practices is crucial for anyone enjoying the beautiful outdoors. For more detailed information on UV levels, check out the Hagatna Village UV Index.
UV Risk Categories
As summer wanes into September in Hagatna Village, Guam, the sunny days start to ease, recording 259 hours of sunshine—a noticeable dip from the peak sunshine of 336 hours in May. This month typically marks a transition, as daylight begins to retreat while the island still enjoys ample brightness. Following September, a gradual increase in sunlight is expected as October brings 263 hours, hinting at a blend of lingering warmth and the onset of the cooler season. The trend from January to September showcases a robust seasonal sun pattern, with the most sunshine recorded in the late spring and an overall resilience in brightness lasting well into the fall, inviting residents and visitors alike to bask in the natural glow of this beautiful locale.
In Hagatna Village, Guam, September offers a stark contrast to the sun-drenched months that proceed it, with a mere 13% chance of sunny weather. This trend highlights a significant decline in sunshine as the year progresses from the relatively bright days of March, which boasts a 63% chance, to the gloomy summer months of July and August, where the sun rarely makes an appearance. As autumn approaches, the likelihood of rain increases, suggesting that those visiting in September should prepare for overcast skies rather than beach time. This dip in sunny weather makes September one of the less favorable months for sun-seekers in this tropical paradise.
As September rolls into Hagatna Village, Guam, residents enjoy a consistent 12 hours of daylight, maintaining the summer's bright embrace. Following a pattern established in the previous months, this slight plateau of sunlight reflects the tropical climate's stability, bringing both warmth and vitality to the island. While the intensity of daylight begins to wane in October, the enduring 12-hour stretch in September provides the perfect backdrop for outdoor activities and community gatherings, allowing locals and visitors alike to savor the lush landscapes before the shorter days set in. Thus, September stands as a bridge between summer's vibrancy and the approaching cooler months, inviting everyone to make the most of its sunlit hours.
In September, the average wind speed in Hagatna Village, Guam typically hovers around 5.0 m/s (11 mph), marking a continuation of the gentle breezes that began in the summer months. This slight dip in wind speed follows a trend observed from the more robust average speeds of earlier months, particularly January through May, where winds were notably stronger. As the year transitions toward the end, the cool, steady winds of September provide a calming reprieve from the summer heat, creating a tranquil atmosphere perfect for enjoying the beauty of the village. This consistent breeze, while not as brisk as the beginning or end of the year, contributes to the warm, inviting charm that characterizes Hagatna throughout the fall.
Weather in Hagatna Village varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Hagatna Village, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warm and humid, with temperatures typically ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F) and an average of 28°C (82°F). This month also sees significant rainfall, with 375 mm (14.8 in) of precipitation spread over 28 days, leading to a humidity level of 81%. Conversely, January experiences slightly cooler temperatures, with a minimum of 25°C (77°F), an average of 27°C (81°F), and a maximum of 28°C (83°F). Precipitation is considerably lower in January, totaling only 61 mm (2.4 in) over 15 days, while humidity remains high at 83%. For more detailed information, you can check Hagatna Village weather in January.
In comparing the weather between September and February, both months showcase warm temperatures, with September slightly warmer, averaging around 28°C (82°F) compared to February's 27°C (80°F). September experiences significantly higher precipitation, with 375 mm (14.8 in) over 28 days, while February brings only 77 mm (3.0 in) across 15 days. Humidity levels are relatively similar, hovering around 81% in September and 82% in February, making both months feel quite tropical. For a detailed look at the weather specifics in February, you can refer to Hagatna Village weather in February.
In September, temperatures in Hagatna Village typically range from a minimum of 25°C (77°F) to a maximum of 30°C (86°F), with an average of 28°C (82°F). However, this month also sees significant rainfall, totaling 375 mm (14.8 in) across 28 days, resulting in a high humidity level of 81%. In contrast, March offers a slightly milder climate, with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 28°C (83°F) and an average temperature of 27°C (81°F). Precipitation in March is considerably lower at just 53 mm (2.1 in) over 15 days, accompanied by a higher humidity level of 84%. For more detailed information on March weather, you can visit Hagatna Village weather in March.
In comparing the weather of September and April, it’s clear that both months experience warm temperatures, with September slightly warmer, averaging around 28°C (82°F) compared to April's 27°C (81°F). However, September is considerably wetter, with a total precipitation of 375 mm (14.8 in) spread across 28 days, while April sees much less rainfall at 94 mm (3.7 in) over 18 days. Additionally, humidity levels remain high in both months, with September at 81% and April slightly higher at 84%. For a detailed look at April weather, you can visit Hagatna Village weather in April.
In comparing the weather of September and May, both months feature similar average temperatures, hovering around 28°C (82°F), but September tends to be slightly warmer at its maximum of 30°C (86°F), compared to May’s peak of 29°C (84°F). However, September experiences significantly more precipitation, with 375 mm (14.8 in) spread over 28 days, while May sees much less rainfall at 78 mm (3.1 in) over 22 days. Humidity levels are also quite high in both months, reaching 81% in September and 83% in May, making the air feel quite muggy. For a closer look at May's weather specifics, you can check out Hagatna Village weather in May.
In comparing the weather of September and June, both months share similar average temperatures, with a minimum of around 25°C (77°F) and an average of 28°C (82°F). However, September tends to be wetter, receiving a substantial 375 mm (14.8 in) of precipitation over 28 days, compared to June's 159 mm (6.3 in) over 23 days. The humidity is slightly higher in September at 81%, compared to June’s 80%, indicating a more muggy atmosphere as summer transitions to autumn. For those interested in more detailed weather patterns, you can explore Hagatna Village weather in June.
In comparing the weather between September and July, both months feature similar average temperatures around 28°C (82°F), with July experiencing a slightly lower minimum and maximum temperature range. September, however, sees an increased amount of rainfall, with a total of 375 mm (14.8 in) spread across 28 days, compared to July's 276 mm (10.9 in) over 30 days. The humidity levels are quite similar as well, hovering around 80-81%. For a more detailed look into July's weather specifics, you can check Hagatna Village weather in July.
Comparing the weather of September and August reveals some intriguing similarities and differences. Both months maintain a minimum temperature of 25°C (77°F) and an average temperature of 28°C (82°F). However, September sees a slight increase in maximum temperature, reaching 30°C (86°F) compared to August's 29°C (85°F). Precipitation levels are notably different, with September receiving 375 mm (14.8 in) across 28 days, while August has higher totals at 405 mm (16.0 in) over 30 days. Humidity levels are comparable, with September at 81% and August at 80%. For more detailed weather insights, check out Hagatna Village weather in August.
In comparing the weather between September and October, we see a slight decrease in maximum temperatures, with October recording a high of 29°C (85°F) compared to September’s 30°C (86°F). Both months maintain an average temperature of 28°C (82°F), and the minimum temperature remains consistent at 25°C (77°F). Rainfall in October is marginally lower at 356 mm (14.0 in) over 29 days, compared to September's 375 mm (14.8 in) over 28 days, indicating a similar but slightly drier pattern. Humidity levels remain high but show a slight dip from 81% in September to 80% in October. For a detailed look at October weather conditions, visit Hagatna Village weather in October.
In comparing the weather between September and November, both months exhibit a similar average temperature of 28°C (82°F), with September experiencing slightly higher maximum temperatures at 30°C (86°F) compared to November's maximum of 29°C (85°F). Humidity levels remain consistent at 81% for both months. However, September is notably wetter, receiving 375 mm (14.8 in) of precipitation over 28 days, while November sees a significant reduction in rainfall, totaling 202 mm (8.0 in) across 26 days. For a closer look at the weather specifics in November, you can check out Hagatna Village weather in November.
In comparing the weather between September and December, September typically sees warmer temperatures with a minimum of 25°C (77°F) and an average of 28°C (82°F), reaching a maximum of 30°C (86°F). This month also experiences significant rainfall, accumulating 375 mm (14.8 in) spread over 28 days, contributing to a humidity level of 81%. In contrast, December offers slightly cooler temperatures, with a minimum of 26°C (78°F) and a maximum of 29°C (84°F), while maintaining a similar average of 27°C (82°F). Precipitation drops considerably to 105 mm (4.1 in) across 22 days, resulting in a higher humidity level of 84%. For further details on the December climate, you can visit Hagatna Village weather in December.
September in Hagatna Village brings a distinct shift in weather patterns compared to other months, characterized by high humidity levels and frequent rain. With an average temperature hovering around a warm 28°C, the island's tropical climate is evident, yet the nearly daily precipitation transforms the landscape, contributing to its lush beauty. This increase in rainfall sets September apart as one of the wettest months of the year, making it crucial for those planning to visit to prepare for the unpredictable showers. For a more detailed understanding of the weather trends throughout the year, explore Hagatna Village Climate.