Last updated: August 21, 2025
September in Port Royal, Jamaica is characterized by warm temperatures and a high humidity level, providing a tropical backdrop for visitors. With a maximum temperature reaching 32°C (90°F), the average settles comfortably at 27°C (81°F), while lows hover around 24°C (75°F). This month is also marked by significant precipitation, totaling 105 mm (4.1 in) across 18 days, making it one of the wetter months. Despite the rain, the lush landscape and vibrant atmosphere continue to attract those seeking the beauty and warmth of Jamaica’s coastline.
As September rolls into Port Royal, Jamaica, the temperatures reflect a tropical embrace, maintaining a consistent warmth that is characteristic of the late summer months. With minimums hovering around 24°C (75°F) and averages at 27°C (81°F), the climate remains inviting for both locals and visitors alike. Daytime highs reach up to 32°C (90°F), matching the warmth experienced in the preceding months of July and August. This stable temperature pattern indicates a transition period in the Caribbean, where the balmy air encourages leisurely beach days and outdoor adventures before the cooler autumn breezes begin to sweep in. Whether basking under the sun or enjoying the soft evening warmth, September's weather in Port Royal exudes an undeniable essence of tropical bliss.
September marks a notable shift in Port Royal, Jamaica's precipitation patterns, with rainfall reaching 105 mm (4.1 in) over 18 days. This makes September one of the wettest months of the year, closely following the heavy rains of August, which recorded 98 mm (3.8 in). The increase in precipitation is indicative of the transition into the wet season, where the intensity and frequency of rains elevate, setting the stage for the even more significant downpours in October. As September unfolds, the combination of warm tropical air and increased moisture contributes to this surge, influencing the lush landscape and vibrant ecosystem characteristic of Jamaica during this time.
In September, Port Royal, Jamaica experiences an average humidity of 77%, slightly lower than the peak levels seen in the summer months of June and July, which both boast a humidity of 79%. This transitional month indicates a gradual return to the milder humidity levels seen earlier in the year, as it aligns closely with the 76% average of January and October. Overall, from the dry months in early winter to the warmer, more humid summer, the humidity in Port Royal fluctuates predictably, with September marking a subtle, yet refreshing, decrease that hints at the upcoming fall season.
In September, Port Royal, Jamaica experiences a UV Index of 12, categorizing it within the extreme exposure zone. This reflects a slight decline from the peak summer months, which typically record UV indices of 13 or higher from June through August. Despite this decrease, the recommended burn time remains a swift 10 minutes, underscoring the need for vigilant sun protection. As daylight hours still enjoy ample sunshine, it’s essential for locals and visitors alike to stay informed and safe under the Jamaican sun. For comprehensive insights on UV levels throughout the year, explore Port Royal UV Index.
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September in Port Royal, Jamaica, is blessed with 321 hours of sunshine, contributing to its warm and inviting atmosphere. As the summer winds down, this month sees a slight dip in sunlight compared to the vibrant hours of July and August, which boast 354 and 342 hours, respectively. However, September maintains a consistent glow, outperforming the first half of the year and trailing only marginally behind May and June. This ensures that visitors can still enjoy ample sunshine while exploring the rich culture and stunning landscapes of this coastal gem. Overall, the sunshine pattern from spring into autumn reveals a delightful progression of brightness, with September elegantly bridging the gap between the intense summer sun and the gentle light of the approaching fall.
In Port Royal, Jamaica, the likelihood of sunny weather in September stands at a moderate 54%, offering a pleasant mix of sun and clouds. As summer transitions to fall, this figure marks a slight rebound from the lower chances seen in the peak months of June and August, both of which dip below 50%. Interestingly, September's sunshine odds are among the higher rates following the intense sunny months of February and March, while also aligning closely with the overall trend of moderate sunny conditions typical of early autumn. As such, visitors can expect a charming blend of sunshine and relaxation, making it an appealing time to explore the vibrant shores of Jamaica.
In September, Port Royal, Jamaica enjoys a delightful 12 hours of daylight, continuing the trend of abundant sunshine that characterizes the summer months. As the summer heat gradually gives way to the embrace of autumn, the daylight duration remains consistent with August, showcasing a stable transition within the calendar year. Following the peak of 13 hours in June and July, the slight taper in daylight during this month suggests a gradual shift towards the shorter days of fall. The consistent light throughout September offers ample opportunity for outdoor adventures, making it a vibrant time to experience the beauty of the island before daylight starts to wane again in October.
In September, the winds in Port Royal, Jamaica begin to soften, with an average speed of just 2.6 m/s (6 mph), marking it as the calmest month of the year. This gentle breeze contrasts sharply with the sturdier gusts of the preceding summer months, where July and August each boasted winds of 4.3 m/s (10 mph). As the tropical heat begins to wane, the lighter winds create a serene atmosphere, perfect for leisurely strolls along the coastline. This trend of diminishing winds continues into October and November, where speeds remain modest, settling at 2.9 m/s (6 mph) and 2.7 m/s (6 mph) respectively. This transition into the quieter months of the year invites a sense of tranquility, making September a unique time to experience the beauty of Port Royal's coastal charm.
Weather in Port Royal varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Port Royal, focusing on differences in temperature, rainfall, humidity, and UV levels.
September tends to be warmer and more humid than January, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), accompanied by higher precipitation levels of 105 mm (4.1 in) over 18 rainy days. In contrast, January offers a slightly cooler climate, with temperatures ranging from a minimum of 20°C (69°F) to a maximum of 29°C (84°F), and significantly less rain, totaling 38 mm (1.5 in) across only 10 days. The humidity remains relatively similar, with September at 77% and January at 76%. For more detailed information, you can check Port Royal weather in January.
September typically experiences warmer weather compared to February, with average temperatures reaching 27°C (81°F) and highs of 32°C (90°F). In contrast, February's temperatures are milder, averaging 24°C (76°F) with a maximum of 28°C (83°F). Additionally, September sees significantly more rainfall, with 105 mm (4.1 in) over 18 days, while February has just 35 mm (1.4 in) across 14 days. Humidity levels remain similar, around 76-77%. For more detailed information, you can visit Port Royal weather in February.
In September, the weather tends to be warmer and more humid, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 32°C (90°F). The month experiences substantial rainfall, totaling 105 mm (4.1 in) over approximately 18 days, resulting in a humidity level of 77%. In contrast, March offers a milder climate, with average temperatures from a minimum of 20°C (69°F) to a maximum of 28°C (84°F). This month sees significantly less rainfall, with only 46 mm (1.8 in) spread over about 15 days, and a slightly lower humidity at 75%. For more details on March weather, visit Port Royal weather in March.
Comparing the weather in September and April reveals notable differences in temperature and precipitation. In September, the average temperature peaks at 27°C (81°F), with maximums reaching up to 32°C (90°F), making it slightly warmer than April, where the average temperature is 25°C (78°F) and the highest recorded temperature is 30°C (86°F). Additionally, September experiences higher precipitation at 105 mm (4.1 in) over 18 days, compared to April's 66 mm (2.6 in) over just 12 days. The humidity remains quite similar, with September at 77% and April slightly lower at 76%. Overall, September tends to be warmer and wetter than April. For more details, you can check Port Royal weather in April.
When comparing the weather in September and May, we see that both months have similar temperature ranges and humidity levels. September has a slightly higher average temperature of 27°C (81°F) with maximums reaching up to 32°C (90°F), compared to May's average of 26°C (79°F) and maximum of 30°C (87°F). Both months experience significant rainfall, with September receiving 105 mm (4.1 in) over 18 days and May slightly more with 107 mm (4.2 in) over 16 days. Interestingly, despite the comparable precipitation, the humidity remains consistent at 77% for both months, contributing to a tropical feel. For more details on the weather during this time, you can visit Port Royal weather in May.
In comparing the weather between September and June, we see some notable similarities and differences. Both months feature relatively high average temperatures, with September having a minimum of 24°C (75°F) and an average of 27°C (81°F), while June's temperatures are slightly cooler, with a minimum of 23°C (74°F) and a similar average of 27°C (80°F). In terms of maximum temperatures, September peaks at 32°C (90°F), slightly higher than June's maximum of 31°C (88°F).
However, September is considerably wetter, receiving 105 mm (4.1 in) of precipitation over 18 days, compared to June's 49 mm (1.9 in) over just 13 days. The humidity also remains high in both months, with September at 77% and June at 79%. To explore more about the weather specific to June, you can refer to Port Royal weather in June.
When comparing the weather of September and July, both months exhibit similar temperature ranges with minimums around 24°C (75°F), averages of 27°C (81°F), and maximums reaching 32°C (90°F). However, September is marked by significantly higher precipitation, accumulating 105 mm (4.1 in) over 18 days, whereas July experiences much lighter rainfall at just 37 mm (1.5 in) spread over 11 days. Additionally, humidity levels in September average at 77%, slightly lower than July's average of 79%. For a closer look at July's conditions, you can check Port Royal weather in July.
September continues the warm trend of summer with minimum temperatures remaining steady at 24°C (75°F) and average highs reaching up to 32°C (90°F), similar to August. However, September experiences slightly higher precipitation with 105 mm (4.1 in) over 18 days, compared to August's 98 mm (3.8 in) spread over 16 days. Humidity remains comparable, with September at 77% and August at 78%. For a detailed look at temperature trends during August, you can visit Port Royal weather in August.
In September, the weather is characterized by warmer temperatures, with a minimum of 24°C (75°F), an average of 27°C (81°F), and a maximum reaching 32°C (90°F). Despite the warmer average, September experiences a total precipitation of 105 mm (4.1 in) over 18 days, contributing to a humidity level of 77%.
Conversely, October brings slightly cooler temperatures, with a minimum of 23°C (74°F), an average of 26°C (80°F), and a maximum of 31°C (87°F). However, October sees a significant increase in rainfall, totaling 196 mm (7.7 in) across 24 days, while humidity remains relatively stable at 76%. For more detailed information, you can check Port Royal weather in October.
September and November showcase a gradual transition in weather patterns. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 32°C (90°F), with an average of 27°C (81°F), accompanied by significant rainfall totaling 105 mm (4.1 in) over 18 days. Humidity hovers around 77%. In contrast, November experiences slightly cooler temperatures, with a minimum of 23°C (73°F), an average of 26°C (79°F), and a maximum of 30°C (86°F). Rainfall increases to 137 mm (5.4 in) over 20 days, while humidity remains comparable at 78%. For more detailed insights into November's weather, visit Port Royal weather in November.
In September, the weather is generally warmer with average temperatures reaching 27°C (81°F) and highs of 32°C (90°F). This month also sees more precipitation, totaling 105 mm (4.1 in) over 18 days, keeping humidity at a steady 77%. In contrast, December offers milder temperatures with an average of 25°C (78°F) and maximums of 29°C (85°F), along with significantly reduced rainfall of 45 mm (1.8 in) over 13 days. Both months share the same humidity level, but December feels cooler and drier overall. For more insights on December weather, you can check out Port Royal weather in December.
As September rolls into Port Royal, the weather exhibits a unique character compared to other months. Temperatures remain warm, typically hovering around a comfortable average, but humidity peaks, creating a palpable muggy atmosphere that's distinctive to this time of year. This month also sees a notable increase in precipitation, with rain gracing the island on nearly two-thirds of the days, a stark contrast to the drier summer months. While the occasional storm can lend a dramatic flair, September’s lush, vibrant landscapes thrive on this seasonal rain, making it a fascinating month to experience the natural beauty of Port Royal. For more detailed insights into the climate, visit Port Royal Climate.