Last updated: August 21, 2025
September in Port Antonio, Jamaica offers a warm tropical climate, characterized by a maximum temperature of 32°C (89°F) and an average of 27°C (81°F), perfect for sun-seekers. Nighttime temperatures cool to a minimum of 24°C (76°F), providing comfortable evenings. However, the month is also marked by frequent rainfall, with a total precipitation of 119 mm (4.7 in) spread across 23 days, contributing to a humidity level of 75%. While the weather may present occasional showers, it's a splendid time to explore the lush landscapes and vibrant culture that Jamaica has to offer.
In September, Port Antonio, Jamaica, experiences a delightful tropical warmth, with temperatures ranging from a minimum of 24°C (76°F) to a peak of 32°C (89°F). The average temperature sits comfortably at 27°C (81°F), marking the month as one of the warmer periods of the year. This month typically showcases a trend of gradually rising temperatures that have been building since July and August, where highs also linger around the 31°C (87°F) mark. As the summer fades, September's humidity remains palpable, promising balmy days perfect for beach outings and outdoor adventures, while also hinting at the anticipated cooling that follows as autumn approaches.
September in Port Antonio, Jamaica, marks a continuation of the region's vibrant precipitation patterns, with 119 mm (4.7 in) of rain falling over approximately 23 days. This month strikes a balance between the heavier downpours of October and the summer's lighter showers, with rainfall slightly decreasing from August's notable 130 mm (5.1 in). Interestingly, post-summer rains often nurture the lush landscapes and support local agriculture, reflecting a seasonal shift in the climate. As the year progresses, October’s average of 222 mm (8.7 in) hints at a forthcoming intensification in rainfall, suggesting that while September might offer a brief respite, the wet season is far from over. Overall, September serves as a transitional month, setting the stage for the heavier rains ahead while still supplying plenty of moisture to the region's thriving ecosystem.
In September, Port Antonio experiences a humidity level of 75%, reflecting a noticeable trend of elevated moisture in the air as summer comes to a close. This month sits just slightly below the peak humidity of August, which reaches 76%, indicating a transition from the sultry summer months into the more temperate fall season. As the year progresses, humidity levels tend to fluctuate, dipping to their lowest in May at 64%, then gradually rising through the summer. The increase in humidity from July to November suggests that if you're visiting during this time, be prepared for the warm and sticky embrace that characterizes the tropical climate of Jamaica.
In September, the UV Index in Port Antonio, Jamaica typically stands at 12, categorizing it as extreme with a burn time of just 10 minutes. As the summer months draw to a close, residents and visitors alike should remain vigilant, as UV levels remain consistently high throughout the year. From January's UV Index of 9 to the peak of 14 in April, the trend shows that Jamaica's sun delivers intense UV radiation, particularly during the spring and summer months. September continues this pattern, just slightly lower than the summer months, reminding sun-seekers to take necessary precautions. For more on navigating the UV landscape, visit Port Antonio UV Index.
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In September, the vibrant charm of Port Antonio, Jamaica, continues to shine with a remarkable 321 hours of sunshine. This inviting amount of daylight follows a pattern established over the months, peaking in the summer with July's impressive 354 hours. As the year transitions towards autumn, sunshine hours decline slightly but remain generous compared to the earlier months, showcasing a seamless blend of warmth and comfort. September’s glow is a delightful reminder that the Caribbean sun never truly dims, providing a perfect backdrop for both adventure and relaxation amidst the stunning coastal scenery.
September in Port Antonio, Jamaica, offers a moderate chance of sunny weather, with a 55% likelihood of clear skies. This month stands out as a transition period, showing an uplift compared to the more overcast summer months of June (44%), July (48%), and August (42%). Interestingly, as the island moves into autumn, the chances of sunshine become more favorable than in the months preceding it, suggesting a promising, yet slightly unpredictable weather pattern. Overall, September provides a sweet spot for travelers seeking sun, blending the tail end of the summer warmth with hints of fall.
As September rolls into Port Antonio, Jamaica, daylight lingers around 12 hours, maintaining the balanced rhythm established in the summer months. Following a peak in June and July with 13 hours of sunlight, the daylight duration gently tapers off, hinting at the upcoming cooler months. This gradual decrease continues into October, bringing back the 11 hours of daylight typical in the winter months. Interestingly, the transition from summer to fall is smooth, as the daylight hours remain consistent, offering residents and visitors alike ample time to bask in the tropical beauty of Jamaica.
In September, Port Antonio, Jamaica experiences a dip in the average wind speed, with gentle breezes clocking in at just 2.6 m/s (6 mph). This marks the lowest wind speed of the year, putting a serene punctuation on the summer months. Following a gradual increase from January to August, where winds consistently hover around 3.6 to 4.3 m/s, September's calmness offers a charming contrast, inviting visitors to bask in the tranquil coastal atmosphere. As the year progresses into the fall, the winds tend to pick up slightly again, but September remains a month of relaxation, perfectly suited for leisurely days by the beach.
Weather in Port Antonio varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Port Antonio, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is notably warmer with an average temperature of 27°C (81°F) and maximum highs reaching 32°C (89°F), accompanied by higher humidity at 75%. This month also sees more rainfall, with a total precipitation of 119 mm (4.7 in) spread over 23 days. Conversely, January enjoys milder temperatures, with an average of 24°C (76°F) and maximums only reaching 27°C (81°F). It experiences less precipitation at 94 mm (3.7 in) over 18 days, along with lower humidity at 70%. For a closer look at the conditions in January, check out Port Antonio weather in January.
In comparing the weather of September and February, September tends to be warmer, with average temperatures ranging from a minimum of 24°C (76°F) to a maximum of 32°C (89°F), whereas February has a milder climate with temperatures ranging from 21°C (71°F) to 27°C (81°F). September also experiences higher humidity at 75% and significantly more precipitation, with 119 mm (4.7 in) of rainfall over approximately 23 days, compared to February, which has 78 mm (3.1 in) of rain across 21 days and lower humidity at 67%. For more detailed information about weather conditions during February, you can check this link: Port Antonio weather in February.
In comparing the weather between September and March, September tends to be warmer, with average temperatures ranging from a minimum of 24°C (76°F) to a maximum of 32°C (89°F), while March has a cooler average, with temperatures between 21°C (69°F) and 27°C (81°F). Both months experience considerable precipitation, with September receiving 119 mm (4.7 in) over 23 days and March slightly higher at 122 mm (4.8 in) over 21 days. Humidity levels are also different; September is more humid at 75%, compared to March's 66%. For more detailed insights on the weather in March, you can visit Port Antonio weather in March.
When comparing the weather in September and April, it's clear that September tends to be warmer and more humid. September features an average temperature of 27°C (81°F) with maximums reaching up to 32°C (89°F), while April averages a cooler 25°C (77°F) with maximums of 28°C (83°F). Additionally, September experiences higher precipitation, measuring 119 mm (4.7 in) over 23 days, compared to April's 105 mm (4.1 in) over 20 days. The humidity level is also higher in September at 75%, compared to 66% in April. For more detailed information on April's weather, you can check Port Antonio weather in April.
September and May have similar warm temperatures, with September having a slightly higher range, featuring a minimum of 24°C (76°F) and a maximum of 32°C (89°F), compared to May's minimum of 23°C (73°F) and maximum of 29°C (84°F). However, September experiences more precipitation, averaging 119 mm (4.7 in) across 23 days, whereas May sees slightly less rain with 142 mm (5.6 in) over the same number of days. Notably, humidity levels are higher in September at 75%, while May has a more comfortable humidity level of 64%. For a deeper look at May's weather patterns, check out Port Antonio weather in May.
September and June share similar temperature ranges, with both months experiencing a minimum of around 24°C (76°F) and average highs close to 27°C (81°F). However, September tends to be warmer overall, reaching maximum temperatures of 32°C (89°F) compared to June's peak of 29°C (85°F). September is also considerably wetter, receiving 119 mm (4.7 in) of rain over 23 days, while June sees only 75 mm (2.9 in) across 20 days, contributing to a higher humidity level of 75% compared to June's 66%. For more detailed insights, check out Port Antonio weather in June.
In comparing the weather patterns of September and July, both months exhibit similar minimum and average temperatures, with September showing slightly warmer maximum temperatures. September registers a high of 32°C (89°F) compared to July's maximum of 31°C (87°F). However, September experiences more precipitation, totaling 119 mm (4.7 in) over 23 days, whereas July has only 63 mm (2.5 in) across 18 days. Humidity levels are comparable, with September slightly higher at 75% versus July's 73%. For a more detailed overview, you can check out Port Antonio weather in July.
In comparing the weather between August and September, both months exhibit similar temperature ranges, with September seeing a minimum of 24°C and a maximum of 32°C, while August has a comparable minimum of 24°C and a slightly lower maximum of 31°C. The average temperatures remain stable at around 27°C for both months. However, September experiences slightly less precipitation, totaling 119 mm over 23 days, compared to August's 130 mm across 22 days. Humidity levels also remain consistent, with September at 75% and August at 76%. For a more detailed view of the weather in August, you can visit Port Antonio weather in August.
In September, the weather is characterized by warm temperatures, with minimums around 24°C (76°F) and maximums reaching up to 32°C (89°F). This month experiences an average temperature of 27°C (81°F) and a total precipitation of 119 mm (4.7 in) over 23 days, accompanied by humidity levels of 75%. In contrast, October sees a slight decrease in average temperature to 26°C (80°F) and maximums of 30°C (86°F), while remaining steady with minimums at 24°C (75°F). However, October brings significantly higher precipitation, totaling 222 mm (8.7 in) over 26 days, yet maintaining the same humidity level of 75%. For more detailed insights, refer to Port Antonio weather in October.
September and November exhibit some notable differences in weather patterns. In September, temperatures range from a minimum of 24°C (76°F) to a maximum of 32°C (89°F), with an average of 27°C (81°F). This month sees relatively high humidity at 75% and experiences 119 mm (4.7 in) of precipitation over 23 days. In contrast, November features slightly cooler temperatures, with a minimum of 23°C (73°F), an average of 26°C (79°F), and a maximum of 29°C (85°F). However, November also brings increased rainfall, totaling 183 mm (7.2 in) across the same number of days, with humidity reaching 77%. For more details on the weather in November, visit Port Antonio weather in November.
In September, the weather tends to be warmer with average temperatures reaching around 27°C (81°F) and maximum highs of 32°C (89°F), while December experiences slightly cooler conditions with an average of 25°C (77°F) and a maximum of 28°C (83°F). Both months have similar precipitation levels, with September receiving about 119 mm (4.7 in) over 23 days and December seeing 120 mm (4.7 in) over 22 days. Humidity levels are also quite comparable, with September at 75% and December slightly lower at 73%. For more detailed information on the December climate, you can check Port Antonio weather in December.
As September unfolds in Port Antonio, visitors can expect a warm embrace with temperatures averaging around 27°C, yet the month is marked by frequent shower activities, resulting in a characteristic humidity of 75%. Unlike the drier months, September sees substantial rain, averaging 119 mm over roughly three weeks, which is a shift from the typical Caribbean flair enjoyed in drier periods. Those planning to explore this vibrant destination should be prepared for both sunshine and sporadic downpours, enhancing the lush surroundings and rich landscapes. For a deeper dive into what the weather has in store year-round, visit Port Antonio Climate.