Last updated: August 31, 2025
September in Koror, Palau brings a warm and humid tropical climate, with average temperatures hovering around 28°C (82°F). Daily highs reach up to 30°C (85°F), while the nights provide a cooler respite at a minimum of 25°C (78°F). This month is characterized by significant rainfall, with a total precipitation of 284 mm (11.2 in) spread across 25 days, creating a lush and vibrant landscape. Humidity levels remain elevated at 79%, contributing to the island's rich biodiversity and enchanting natural beauty. Visitors can expect a blend of warm weather and refreshing showers, perfect for exploring this tropical paradise.
As September rolls around in Koror, Palau, the temperatures begin to show a subtle but inviting shift. The minimum temperature remains steady at a comfortable 25°C (78°F), while the average nudges up slightly to 28°C (82°F), hinting at the warmth of late summer. Notably, this month marks a peak in the maximum temperatures, which can reach a delightful 30°C (85°F), providing perfect conditions for beach-goers and outdoor explorers alike. Compare this to the consistency of earlier months, and it's clear that September is a sweet spot for those seeking both warmth and comfort in this tropical paradise.
In September, Koror, Palau experiences a significant amount of rainfall, with 284 mm (11.2 in) accumulating over 25 days. This precipitation level is slightly lower than the peaks of earlier months like May and July, which recorded some of the heaviest rainfall of the year. Interestingly, while September sees a decrease in total rainfall compared to the summer months, it still maintains a robust pattern of rainy days, reflecting the region's tropical climate. As the wet season continues to unfold, this moderate yet consistent precipitation contributes to the lush greenery and vibrant ecosystems that define Koror, making it a captivating destination for nature enthusiasts.
In September, humidity levels in Koror, Palau settle at a comfortable 79%, marking a slight increase from the drier months of June and July, both at 77%. This elevates the overall humidity trend as the region transitions from the drier summer months towards the more humid conditions of the latter part of the year. Notably, September's humidity is consistent with the early months of the year, where the percentages hover between 81% and 82%. As the island approaches October, the humidity is expected to maintain a steady rhythm, typically resting around 77%, highlighting the subtle yet significant fluctuations that characterize Koror's tropical climate.
September in Koror, Palau, continues the trend of extremely high UV exposure, with a UV Index of 15 that mirrors the peak summer months of June through August. During this time, the burn time remains critically short at just 10 minutes, emphasizing the urgency for sun protection. This consistency in the UV Index highlights Koror's tropical climate, where precautions against sun damage are necessary almost year-round. As you enjoy the stunning beaches and vibrant landscapes, remember that staying safe under the intense sun is key. For more detailed information, visit the Koror UV Index.
UV Risk Categories
As the calendar turns to September, Koror, Palau, continues to bask in a delightful embrace of sunshine, logging an impressive 278 hours of bright skies. While this month's sunshine hours mark a slight dip from the peak months of May and March, it remains consistent with the warmer summer months, indicating a stable climate for outdoor activities. The trend reveals a gradual decline in sunlight hours leading into the fall, yet September still offers ample opportunities for sun-soaked adventures. Overall, this tropical paradise maintains a healthy balance of radiance, delighting both residents and visitors alike through the transitional month.
In Koror, Palau, the likelihood of sunny weather exhibits notable seasonal trends, with September showing a 15% chance of sunshine. This slight dip in sun probability follows the more promising months of April and August, which boast chances of 35% and 26%, respectively. Although September offers limited sunny days compared to the peak periods, it aligns with the lower probabilities seen in the earlier winter months. Generally, sun-seekers might find better odds in the spring and summer, suggesting that September, while still warm and inviting, is not the prime choice for those prioritizing sunny skies.
In September, Koror, Palau enjoys an inviting 12 hours of daylight, continuing the trend established over the previous five months. This consistent daylight duration reflects a stable tropical climate where the sun shines brightly, creating perfect conditions for outdoor ventures and exploration. As the year progresses towards October, daylight begins to taper back to 11 hours, marking the onset of shorter days. This gradual shift highlights a serene rhythm of nature in Koror, where long days of summer transition smoothly into the cozy embrace of autumn, making September an ideal time to soak up the sun before the daylight diminishes.
In September, Koror, Palau experiences a gentle breeze, with an average wind speed of 3.7 m/s (8 mph). This marks a subtle increase from the stiller months of June and August, where winds slowed to a mere whisper. Following the more dormant summer winds, the onset of September signals a transitional phase; the air begins to circulate more, hinting at the approach of the windier months ahead. As the year progresses towards October, fans of the fresh, invigorating air can look forward to a slight uptick again, showcasing the island's dynamic wind patterns throughout the year.
Weather in Koror varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Koror, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Koror is characterized by warm temperatures, with a minimum of 25°C (78°F) and an average of 28°C (82°F), peaking at 30°C (85°F). However, this month also sees significant rainfall, with 284 mm (11.2 in) of precipitation spread over 25 days and humidity levels hovering around 79%. In contrast, January offers slightly cooler conditions, with an average temperature of 27°C (81°F) and a maximum of 29°C (84°F). This month experiences less rainfall, totaling 235 mm (9.2 in) over 21 days, making it a bit drier, albeit with a marginally higher humidity level of 81%. For more details on January weather, you can check Koror weather in January.
In September, the weather features warm temperatures with a minimum of 25°C (78°F), an average of 28°C (82°F), and a maximum of 30°C (85°F). The month sees significant precipitation, totaling 284 mm (11.2 in) spread over 25 days, and humidity levels hover around 79%. In contrast, February experiences slightly cooler temperatures with a minimum of 25°C (77°F), an average of 27°C (81°F), and a maximum of 29°C (85°F). While February has a higher total precipitation of 337 mm (13.3 in) over 22 days, it also features a marginally higher humidity level of 82%. For more details on the February climate, you can check Koror weather in February.
In September, the weather is generally warmer with an average temperature of 28°C (82°F) and maximums reaching up to 30°C (85°F). The month experiences significant rainfall, totaling around 284 mm (11.2 in) over 25 days, contributing to a high humidity level of 79%. In contrast, March offers slightly cooler conditions, with an average temperature of 27°C (81°F) and maximums of 29°C (85°F). Precipitation in March is lower, accumulating to 188 mm (7.4 in) across 21 days, and the humidity is marginally higher at 82%. For more detailed insights, check the meteorological conditions at Koror weather in March.
In September, the weather tends to be slightly warmer with average temperatures reaching 28°C (82°F) and a maximum of 30°C (85°F). This month experiences significant precipitation as well, with 284 mm (11.2 in) spread over 25 days, contributing to a high humidity level of 79%. In contrast, April offers a marginally cooler climate, with average temperatures around 27°C (82°F) and a maximum of 29°C (85°F). The rainfall in April is less intense at 225 mm (8.8 in) over 23 days, while the humidity remains relatively high at 80%. For more details about the weather in April, you can check Koror weather in April.
When comparing the weather in September and May, both months share similar average temperatures, with minima around 25-26°C (78°F) and maxima near 30°C (85°F). However, May tends to be slightly drier, with 389 mm (15.3 in) of precipitation over 26 days compared to September's 284 mm (11.2 in) across 25 days. Humidity levels are relatively comparable, with September at 79% and May just a notch lower at 78%. For a more detailed look at May weather specifics, you can check Koror weather in May.
September weather features slightly warmer temperatures with a minimum of 25°C and an average of 28°C, peaking at 30°C, while June offers a similar but marginally cooler range, starting at 26°C and averaging 27°C, reaching a maximum of 29°C. Both months experience significant rainfall, but September sees 284 mm over 25 days, compared to June's higher rainfall of 302 mm across 28 days. Humidity levels are similar, with September at 79% and June slightly lower at 77%. For a more detailed look at June's climate, you can check Koror weather in June.
In comparing the weather of September and July, both months exhibit warm temperatures, with September having a slightly higher average of 28°C (82°F) compared to July's 27°C (81°F). However, July experiences more overall rainfall, with a total precipitation of 365 mm (14.4 in) over 28 days, while September receives 284 mm (11.2 in) across 25 days. Interestingly, the humidity levels are fairly similar, with September at 79% and July at 77%. For more details on July's weather, you can check out Koror weather in July.
In September, the weather exhibits slightly warmer temperatures compared to August, with a minimum of 25°C (78°F) and an average of 28°C (82°F), compared to August's average of 27°C (81°F). Both months are characterized by high humidity, with September averaging 79% and August at 78%. Precipitation remains substantial in both months, although September sees a slight decrease with 284 mm (11.2 in) over 25 days, while August has 299 mm (11.8 in) across 27 days. For a detailed look at August weather patterns, you can visit Koror weather in August.
In September, the weather remains warm with temperatures ranging from a minimum of 25°C (78°F) to a maximum of 30°C (85°F), accompanied by an average temperature of 28°C (82°F). There is significant precipitation, with 284 mm (11.2 in) spread over 25 rainy days and humidity levels at 79%. In contrast, October experiences similar warm temperatures, with a minimum of 26°C (78°F) and a maximum of 30°C (86°F), while maintaining the same average of 28°C (82°F). The month sees slightly less rainfall at 278 mm (11.0 in) over the same number of rainy days, and humidity decreases to 77%. For more detailed information, you can check Koror weather in October.
September and November offer relatively similar weather patterns, with only slight differences in temperature and precipitation. In September, the temperatures range from a minimum of 25°C (78°F) to a maximum of 30°C (85°F), accompanied by an average temperature of 28°C (82°F). The month sees significant rainfall, with 284 mm (11.2 in) recorded over 25 days, contributing to a humidity level of 79%.
In contrast, November features a slightly warmer minimum temperature of 26°C (79°F), with average and maximum temperatures remaining the same at 28°C (82°F) and 29°C (85°F), respectively. Precipitation decreases marginally to 278 mm (10.9 in) over 26 days, resulting in a slightly lower humidity of 77%.
For a more detailed look at the weather conditions in November, you can visit Koror weather in November.
In September, the weather features warm temperatures with a minimum of 25°C (78°F) and an average of 28°C (82°F), peaking at a maximum of 30°C (85°F). However, this month also experiences considerable precipitation, totaling 284 mm (11.2 in) over 25 days, combined with high humidity levels at 79%.
In contrast, December brings slightly warmer temperatures, with a minimum of 26°C (78°F), an average of 28°C (82°F), and a maximum of 29°C (85°F). While the average temperature is quite similar, December sees a higher total precipitation of 309 mm (12.2 in) spread over 28 days, with humidity just a notch lower at 78%. For more details on December's weather specifics, you can check Koror weather in December.
As September rolls into Koror, the weather takes on a distinctive character, characterized by higher humidity and a significant increase in rainfall, making it one of the wettest months of the year. With temperatures consistently warm, balancing around an average of 28°C (82°F), visitors will feel the humidity at 79%, contributing to a muggy atmosphere. The frequent rain over the course of 25 days and a substantial 284 mm of precipitation marks a departure from the drier months earlier in the year. This blend of warmth and near-constant moisture creates a lush tropical environment, perfect for experiencing the island's rich natural beauty. For a deeper dive into Koror's climate patterns, be sure to explore Koror Climate.