Last updated: August 31, 2025
In September, Isabel Segunda, Puerto Rico experiences a warm tropical climate characterized by temperatures averaging 28°C (82°F). The month showcases maximum highs reaching 29°C (85°F) and minimums of 25°C (78°F), creating a consistent warm atmosphere. However, this warmth is complemented by a significant precipitation total of 189 mm (7.4 in), spread across approximately 25 days, contributing to a humidity level of 79%. This combination of heat and moisture reflects the vibrant, lush environment typical of the Caribbean during this time, while also reminding visitors to be prepared for frequent rain showers.
In September, Isabel Segunda, Puerto Rico exhibits warm and inviting temperatures that reflect the peak of summer's embrace. With a minimum of 25°C (78°F) and reaching highs of 29°C (85°F), the average temperature settles at a comfortable 28°C (82°F). This month marks a slight increase compared to its predecessors, as both the minimum and average temperatures have climbed from August. The weather remains consistently warm, perfect for enjoying the island's beautiful beaches and vibrant outdoor life. As the month unfolds, visitors can expect the lingering warmth of the tropical sun to create a perfect backdrop for exploration and relaxation.
In September, Isabel Segunda, Puerto Rico, experiences a significant increase in precipitation, with 189 mm (7.4 in) recorded, marking it as one of the wettest months of the year. This spike in rainfall not only reflects the transition into the heart of the rainy season but is also accompanied by an average of 25 rainy days, maintaining consistency with the preceding months of heavy rain. Following the trend established in August, which saw 151 mm (5.9 in) of rain, September’s precipitation highlights the area's susceptibility to tropical weather patterns. As the year progresses into October, the rainfall begins to taper off slightly to 166 mm (6.5 in), yet September remains a notable benchmark for its high moisture levels, underscoring the dynamic climatic conditions of the region.
In September, Isabel Segunda experiences an average humidity of 79%, marking a slight decrease from the 80% levels observed in both July and August. This continuation of elevated humidity reflects the tropical climate's typical patterns as it transitions from the peak summer months. Throughout the year, humidity levels fluctuate moderately, peaking in the summer and gently tapering off into the fall months. September's humidity is indicative of a transition period where the peak heat of summer begins to wane, leading into the more temperate conditions of autumn. As autumn approaches, humidity remains relatively high, yet it foreshadows a gradual decline heading into the cooler months ahead.
September marks a peak in the UV Index for Isabel Segunda, Puerto Rico, hitting an impressive 14 and categorizing exposure as extreme. This trend of elevated UV levels noted from January's 9 to September's 14 indicates a consistent need for caution as burn times remain as low as 10 minutes throughout the summer months. Following September, the UV Index slightly decreases to 12 in October, yet still stays within the extreme range. As the intensity of the sun becomes more formidable, it's crucial to enjoy the beautiful Puerto Rican sunshine while employing sun safety measures. For more detailed insights, check the Isabel Segunda UV Index.
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As the summer warmth begins to wane, September in Isabel Segunda, Puerto Rico, shines with an impressive 318 hours of sunshine. This marks a subtle dip from the sun-drenched heights of May and July but still offers an abundance of bright days for outdoor adventures. The sunny trend remains consistent throughout the year, with September boasting nearly 50 hours more sunlight than January, ensuring that the island's charm continues to captivate visitors. Following this month, October maintains a similar glow with 316 hours, making the transition into fall a vibrant and inviting experience. Embrace the lingering summer spirit as the sun bathes the island's picturesque landscapes and warm waters, ideal for both relaxation and exploration.
In September, Isabel Segunda, Puerto Rico, enjoys a 54% chance of sunny weather, marking a transition from the more humid summer months. This probability is slightly above the seasonal average, suggesting that visitors can still relish plenty of sunshine as the summer crowds begin to wane. As we look at the broader trend throughout the year, the sunny days peak in February at 69%, while June brings the least sunshine at a mere 23%. September's likelihood is reminiscent of the wetter months that follow, like October, which hovers close at 51%. Overall, while September may not guarantee endless sun, it promises a delightful mix of warm weather and the beauty of the early fall season.
In Isabel Segunda, Puerto Rico, the daylight duration showcases a fascinating ebb and flow throughout the year. September enjoys a pleasant 12 hours of daylight, aligning closely with the summer months of June and July, which boast the longest days at 13 hours. As the year transitions from the warmth of summer to the cooler days of autumn, daylight begins to decrease, but September maintains a robust brightness reminiscent of summer's peak. This pattern illustrates a gradual winding down, as daylight reduces to 11 hours in both October and the winter months, revealing the island's seasonal rhythm that balances light and shadow throughout the year.
As summer transitions into fall in Isabel Segunda, Puerto Rico, September brings a noticeable drop in average wind speed, averaging just 4.9 m/s (11 mph), the calmest month of the year. This decline follows the lively breezes of the preceding months, where July and August flirted with more vigorous winds, reaching up to 7.5 m/s (17 mph). While the winds may soften in September, this serene atmosphere sets the stage for the tranquil beauty of the island, inviting visitors to enjoy the warm, gentle breezes that characterize the early autumn. As October approaches, wind speeds begin a slow ascent once again, hinting at a subtle resurgence before the end of the year.
Weather in Isabel Segunda varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Isabel Segunda, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is typically warmer and more humid, with average temperatures reaching 28°C (82°F) and a notable minimum of 25°C (78°F). This month experiences significant rainfall, with 189 mm (7.4 in) of precipitation spread across 25 days, contributing to a humidity level of 79%. In contrast, January offers a slightly cooler climate, with average temperatures around 25°C (78°F) and a maximum of 27°C (80°F). Precipitation is considerably lower in January, totaling only 51 mm (2.0 in) across 17 days, and humidity is slightly reduced at 76%. For more detailed information, you can visit Isabel Segunda weather in January.
In comparing the weather between September and February, September boasts warmer temperatures, with a minimum of 25°C (78°F) and an average of 28°C (82°F), reaching a maximum of 29°C (85°F). This month also experiences significant rainfall, with 189 mm (7.4 in) of precipitation spread over 25 days, contributing to a humidity level of 79%. In contrast, February offers slightly cooler conditions, with minimum temperatures of 22°C (72°F) and an average of 25°C (77°F), peaking at 27°C (80°F). The precipitation in February is much lower, at 51 mm (2.0 in), occurring over 20 days, and the humidity is slightly reduced at 75%. For more detailed information, visit Isabel Segunda weather in February.
In September, the weather tends to be warmer with average temperatures reaching around 28°C (82°F), peaking at 29°C (85°F), while March offers slightly cooler conditions, with an average of 25°C (77°F) and a maximum of 27°C (80°F). September experiences significantly higher precipitation, totaling 189 mm (7.4 in) over approximately 25 days, compared to March's 64 mm (2.5 in) spread over 20 days. Additionally, humidity levels are higher in September at 79%, whereas March has a slightly lower humidity of 74%. For those interested in more details about March weather, you can refer to Isabel Segunda weather in March.
When comparing the weather in September and April, September tends to be warmer and much wetter. With minimum temperatures averaging 25°C (78°F) and maximum temperatures reaching up to 29°C (85°F), it’s hotter overall, while April experiences slightly cooler temperatures, with an average of 25°C (78°F) and maximums around 27°C (81°F). Precipitation levels in September are significantly higher at 189 mm (7.4 in) over 25 days, compared to April’s 60 mm (2.4 in) over just 17 days. Additionally, September has higher humidity at 79%, while April's humidity is slightly lower at 75%. For a more detailed look, check out Isabel Segunda weather in April.
In comparing the weather of September and May, we find that September tends to be slightly warmer, with average temperatures reaching 28°C (82°F) compared to May's 26°C (79°F). While both months experience high humidity levels, September has a humidity of 79% against May's 75%. Rainfall is significantly heavier in September, with 189 mm (7.4 in) over 25 days, whereas May sees a more moderate 85 mm (3.4 in) over 22 days. For those looking to explore specific weather patterns in May, you can check out Isabel Segunda weather in May.
When comparing the weather in September and June, September tends to be slightly warmer, with average temperatures reaching 28°C (82°F) compared to June's 27°C (81°F). Both months have similar maximum temperatures, but September experiences significantly higher precipitation, with 189 mm (7.4 in) falling over 25 days, whereas June sees only 94 mm (3.7 in) spread across 23 days. Additionally, humidity levels are a bit higher in September at 79%, compared to 77% in June. For more details on the specific weather conditions during June, you can visit Isabel Segunda weather in June.
When comparing the weather in September to that of July, we see notable similarities as well as some differences. Both months experience similar temperature ranges, with September averaging 28°C (82°F) compared to July's 27°C (81°F). The maximum temperatures remain consistent at around 29°C (85°F) for September and 29°C (84°F) for July. However, September is significantly wetter, receiving 189 mm (7.4 in) of precipitation over 25 days, in contrast to July's 148 mm (5.8 in) of rainfall over the same number of days. Humidity levels in both months are comparable, with September at 79% and July slightly higher at 80%. For a more detailed look at July weather in the region, you can refer to Isabel Segunda weather in July.
When comparing the weather in September to that of August, we see a few notable similarities and differences. Both months experienced a minimum temperature of around 25°C (77°F), with an average of 28°C (82°F) and a maximum of 29°C (85°F). However, September is marked by increased precipitation, totaling 189 mm (7.4 inches) compared to August's 151 mm (5.9 inches), despite both months having rainfall on 25 days. Humidity levels are slightly lower in September at 79%, while August was marginally higher at 80%. For a closer look at August's weather patterns, check out Isabel Segunda weather in August.
In September, the weather features a warm range of temperatures with a minimum of 25°C (78°F) and an average of 28°C (82°F), peaking at 29°C (85°F). The month is marked by significant rainfall, accumulating to 189 mm (7.4 in) over 25 days, alongside high humidity levels of 79%. In contrast, October experiences slightly cooler conditions with an average temperature of 27°C (81°F) and similar maximums of 29°C (85°F), but with reduced rainfall of 166 mm (6.5 in) over 22 days. Humidity also drops slightly to 78%, making October a more pleasant month overall. For more detailed insights on October weather, you can visit Isabel Segunda weather in October.
September and November weather show some notable differences despite being relatively close on the calendar. In September, temperatures peak with an average of 28°C (82°F) and high humidity at 79%, accompanied by significant rainfall totaling 189 mm (7.4 in) over 25 days. In contrast, November sees slightly cooler temperatures with an average of 27°C (80°F) and less rainfall at 128 mm (5.1 in) over 22 days, while humidity remains low at 78%. This transition marks a reduction in precipitation and a gradual cooling of temperatures, making November a more enjoyable month for outdoor activities. For more specific insights into the weather in November, you can check Isabel Segunda weather in November.
In September, the weather tends to be warmer and more humid, with temperatures ranging from a minimum of 25°C (78°F) to a maximum of 29°C (85°F) and an average of 28°C (82°F). This month experiences a significant amount of rainfall, totaling 189 mm (7.4 in) over 25 days, contributing to a high humidity level of 79%. In contrast, December offers a slightly cooler climate with temperatures that vary from a minimum of 24°C (75°F) to a maximum of 28°C (83°F) and an average temperature of 26°C (79°F). Precipitation decreases considerably to 74 mm (2.9 in) over 22 days, and humidity drops slightly to 76%. For more detailed information, you can check Isabel Segunda weather in December.
As September rolls into Isabel Segunda, the tropical allure of this charming locale is tempered by increased humidity and a notable uptick in rainfall. While temperatures remain pleasantly warm, the frequent showers—spanning nearly every day of the month—set September apart from the drier summer months. This combination of warmth and moisture creates a lush, vibrant landscape, making it a unique time to experience Isabel Segunda in all its tropical splendor. For those looking to understand more about the overall climate, be sure to check out Isabel Segunda Climate.