Last updated: August 21, 2025
September in Tamuning-Tumon-Harmon Village, Guam is characterized by warm temperatures and high humidity, with a maximum of 30°C (86°F) and an average of 28°C (82°F), while the minimum dips to 25°C (77°F). The island experiences considerable rainfall, accumulating around 375 mm (14.8 in) over the month, resulting in 28 rainy days. Humidity levels hover around 81%, creating a tropical atmosphere perfect for experiencing the lush scenery and vibrant culture of Guam.
In September, the Tamuning-Tumon-Harmon Village area of Guam experiences a slight uptick in warmth, with average temperatures hovering around 28°C (82°F). The month sees a minimum of 25°C (77°F) and peaks at 30°C (86°F), marking the highest maximum temperature for the year. This trend reflects a gradual increase in warmth as summer transitions, continuing the pattern established in the previous months where temperatures rarely dip below 25°C. With consistent averages and the searing maximum, September offers tropical bliss, making it an ideal time for beachgoers and outdoor enthusiasts to soak up the sun amidst the lush natural beauty of Guam.
In September, the Tamuning-Tumon-Harmon Village area of Guam experiences significant rainfall, with an impressive 375 mm (14.8 in) recorded over 28 days. This places September as one of the wettest months of the year, only slightly less than the annual peak in August, which boasts a staggering 405 mm (16.0 in). The trend of increasing precipitation is evident from June onwards, leading to the intense rainy season characterized by frequent downpours. As the region transitions into the latter part of the year, this high level of humidity and rain showcases the vibrant tropical ecosystem, while also necessitating preparedness for potential flooding in the densely populated coastal areas. The consistent rainfall throughout the month, with nearly every day experiencing some form of precipitation, underscores the region's lush, verdant landscape that thrives under these heavy downpours.
As September rolls into Tamuning-Tumon-Harmon Village, Guam, the humidity settles at 81%, reflecting a slight dip from the more humid summer months of July and August, both averaging 80%. This relatively lower humidity is part of a gradual trend observed throughout the year, beginning at 83% in January and peaking at 84% in both March and April. Interestingly, October maintains this refreshing change with humidity remaining steady at 80%, suggesting a consistent climate that is characteristic of the region. Overall, September offers a mild reprieve in humidity, hinting at the approaching transition into the more varied climate of the autumn months.
In September, the UV Index in Tamuning-Tumon-Harmon Village, Guam reaches an extreme level of 15, maintaining the trend of high UV exposure seen throughout the summer months. With a consistent burn time of just 10 minutes, it’s crucial for visitors and residents alike to take proper sun protection measures. September's UV levels are comparable to those in March and April, suggesting a peak in solar intensity as the year transitions towards the fall. This month marks the tail end of a highly sun-soaked season, where careful planning and protection are as essential as ever. For specific details on UV radiation levels, check out the Tamuning-Tumon-Harmon Village UV Index.
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As summer transitions into fall, September in Tamuning-Tumon-Harmon Village, Guam offers a charming mix of sunshine, with about 259 hours of daylight to enjoy. While this marks a slight dip from the sun-drenched heights of May and June—recording 336 and 319 hours respectively—it still provides ample opportunities for outdoor adventures and relaxation. This seasonal shift indicates a gradual reduction in sunshine as the year progresses, yet September retains a warm glow that invites locals and visitors alike to bask in the natural beauty of Guam’s coastal landscapes. With sunshine hours steadily decreasing, it’s the perfect time to savor the remaining warmth before the year wraps up.
In Tamuning-Tumon-Harmon Village, Guam, the likelihood of sunny weather takes a significant dip as summer fades into September, with only a 13% chance of sunshine. This trend reflects a noticeable decline from the brighter months earlier in the year, peaking at 63% in March and gradually declining through the sweltering summer. After reaching a low in August, September carries on this trend, with an equally stark 13% chance, making it one of the least sunny months alongside October. While November bounces back to a more favorable 50%, September remains a good time for those seeking cooler, overcast days rather than the typical sun-drenched beach experience that Guam is known for.
As the year unfolds in Tamuning-Tumon-Harmon Village, Guam, daylight duration reveals a fascinating rhythm. January and February begin with a steady 11 hours of daylight, casting a gentle light on the island's landscapes. As spring approaches, March to August sees a transition to a robust 12 hours of sunshine, offering ample time for outdoor adventures and beach escapades. Remarkably, September maintains this generous 12-hour daylight, providing a consistent backdrop for the vibrant cultural experiences and stunning natural beauty of the region. However, as the year winds down, October through December gently taper back to 11 hours of daylight, closing the year with a soft, warm glow. This trend showcases the island's equilibrium between light and darkness, enhancing the enchanting atmosphere of Guam throughout the seasons.
As September rolls into Tamuning-Tumon-Harmon Village, Guam, the winds begin to mellow, with an average speed of 5.0 m/s (11 mph), marking a gradual decline from the breezier months of winter. This dip aligns with the trend observed since April, where wind speeds have notably decreased, offering a more tranquil atmosphere compared to the earlier high-energy months of January and February, both boasting winds at 8.0 m/s (18 mph). Interestingly, as the year progresses toward October, we see a slight uptick to 5.3 m/s (12 mph), suggesting a subtle resurgence in the breeze. Overall, September stands as a transitional period, bridging the lively winds of summer with the refreshing gusts set to return in the fall, inviting both locals and visitors to savor the island's serene charm.
Weather in Tamuning-Tumon-Harmon Village varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Tamuning-Tumon-Harmon Village, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is characterized by warmer temperatures, with minimums reaching 25°C and average highs around 30°C. This month also sees significantly higher precipitation, totaling 375 mm over 28 days, which contributes to an overall humidity level of 81%. In contrast, January experiences slightly cooler temperatures, with an average of 27°C and maximums peaking at 28°C. The rainfall is drastically reduced to 61 mm over 15 days, leading to a higher humidity of 83%. For more details on January weather, you can refer to Tamuning-Tumon-Harmon Village weather in January.
In comparing the weather between September and February, we see notable differences in temperature and precipitation patterns. September boasts higher 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). It is also characterized by significant rainfall, totaling 375 mm (14.8 in) over 28 days, resulting in high humidity levels of 81%. In contrast, February has a slightly cooler climate, with temperatures ranging from a minimum of 25°C (78°F) to an average of 27°C (80°F) and a maximum of 28°C (83°F). The month experiences much less rainfall, receiving only 77 mm (3.0 in) across 15 days, while maintaining a similar humidity level of 82%. For a closer look at February's weather specifics, you can visit Tamuning-Tumon-Harmon Village weather in February.
September and March present quite different weather patterns. In September, temperatures are warm, with a minimum of 25°C (77°F) and an average of 28°C (82°F), peaking at 30°C (86°F). However, this month also experiences significant precipitation, totaling 375 mm (14.8 in) over 28 days, with humidity levels averaging 81%. In contrast, March sees 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). Additionally, March has a much lower precipitation total of just 53 mm (2.1 in) spread over 15 days, along with a slightly higher humidity at 84%. For a closer look at the conditions in March, check out Tamuning-Tumon-Harmon Village weather in March.
September and April exhibit some notable differences in weather patterns. Both months experience warm temperatures, with September slightly warmer on average, ranging from a minimum of 25°C (77°F) to a maximum of 30°C (86°F), compared to April's range of 25°C (77°F) to 29°C (84°F). However, September is characterized by significantly higher precipitation, receiving 375 mm (14.8 in) over 28 days, while April sees much less rainfall at 94 mm (3.7 in) across 18 days. Additionally, humidity levels are quite similar, with September at 81% and April slightly higher at 84%. Overall, April offers a drier and slightly cooler climate, making it a more favorable time for outdoor activities. For more specific details about the weather in April, you can check Tamuning-Tumon-Harmon Village weather in April.
In September, the weather is characterized by warm temperatures, with minimums around 25°C (77°F) and average highs reaching up to 30°C (86°F). This month experiences significant rainfall, with about 375 mm (14.8 inches) of precipitation spread across 28 days, contributing to a high humidity level of 81%. In contrast, May's climate is similarly warm, presenting minimum temperatures at 25°C (78°F) and average highs around 29°C (84°F). However, precipitation is notably less in May, totaling only 78 mm (3.1 inches) across 22 days, and the humidity level, while slightly higher at 83%, offers a comparatively drier experience. For more detailed information, you can refer to Tamuning-Tumon-Harmon Village weather in May.
In comparing the weather of September and June, we see both months share a similar temperature range, with June having slightly cooler max temperatures at 29°C (85°F) compared to September's peak of 30°C (86°F). However, September is significantly wetter, receiving 375 mm (14.8 in) of rainfall over 28 days, while June has only 159 mm (6.3 in) over 23 days. Both months maintain high humidity levels, with September at 81% and June slightly lower at 80%. For a more detailed look at June weather, you can visit Tamuning-Tumon-Harmon Village weather in June.
In comparing the weather between September and July, both months exhibit similar average temperatures, with September featuring a slightly higher minimum temperature of 25°C (77°F) compared to July's 26°C (78°F), and a slightly higher maximum of 30°C (86°F) versus July's 29°C (85°F). However, September is characterized by significantly greater precipitation, receiving 375 mm (14.8 in) over 28 days, while July has 276 mm (10.9 in) spread across 30 days. Humidity levels remain comparable, with September at 81% and July at 80%. This indicates that September is generally wetter and slightly warmer than July. For more detailed information, you can check out Tamuning-Tumon-Harmon Village weather in July.
In comparing the weather of September and August, both months exhibit similar temperature patterns, with September reaching a minimum of 25°C (77°F) and a maximum of 30°C (86°F), while August has a slightly lower maximum of 29°C (85°F). Precipitation levels, however, differ notably; September experiences 375 mm (14.8 in) of rainfall over 28 days, which is less than August's 405 mm (16.0 in) spread across 30 days. Humidity levels are also comparable, with September at 81% and August slightly lower at 80%. For more detailed insights about August weather, you can refer to Tamuning-Tumon-Harmon Village weather in August.
In September, temperatures remain warm with a minimum of 25°C (77°F) and an average of 28°C (82°F), peaking at a maximum of 30°C (86°F). The month is characterized by significant rainfall, totaling 375 mm (14.8 in) over 28 days, resulting in high humidity levels of 81%. In contrast, October experiences slightly cooler temperatures, with a maximum of 29°C (85°F) and overall similar averages of 28°C (82°F). Rainfall decreases to 356 mm (14.0 in) spread across 29 days, and humidity remains relatively stable at 80%. For more detailed information, you can visit Tamuning-Tumon-Harmon Village weather in October.
In comparing the weather between September and November, we observe that both months feature similar average temperatures, with September slightly warmer, particularly during the maximum temperature, which reaches 30°C (86°F) compared to November's maximum of 29°C (85°F). However, September experiences significantly higher precipitation, totaling 375 mm (14.8 in) over 28 days, while November sees a much reduced rainfall of 202 mm (8.0 in) across 26 days. Humidity levels remain consistent at 81% in both months, adding a tropical feel to the climate throughout this period. For more detailed weather information, you can visit Tamuning-Tumon-Harmon Village weather in November.
In September, the weather is characterized by warm temperatures, with average highs around 30°C (86°F) and considerable humidity at 81%. However, this month experiences significant precipitation, totaling 375 mm (14.8 in) over 28 days, leading to a notably wet atmosphere.
In contrast, December offers slightly cooler conditions, with average temperatures ranging from a minimum of 26°C (78°F) to a maximum of 29°C (84°F), while maintaining an average of 27°C (82°F). The month sees much less rainfall, with only 105 mm (4.1 in) over 22 days, and a slight increase in humidity to 84%. For a more detailed comparison of weather in December, you can visit Tamuning-Tumon-Harmon Village weather in December.
As September unfolds in Tamuning-Tumon-Harmon Village, residents and visitors alike experience a unique climate characterized by higher humidity and considerable precipitation. This month stands out from others, as it witnesses an increase in rainfall and nearly constant warm temperatures, creating a lush and vibrant landscape. With the atmosphere often feeling more humid, the playful dance between sun and rain shapes the daily rhythm of life here. For those looking to understand what to expect, the detailed insights can be found in the full report on Tamuning-Tumon-Harmon Village Climate.