September Weather in Montego Bay, Jamaica

Last updated: August 21, 2025

Experience the vibrant climate of Montego Bay, Jamaica in September! With maximum temperatures reaching 32°C (90°F) and an average of 28°C (82°F), the weather is warm and inviting. The evenings provide a comfortable respite, cooling down to a pleasant 25°C (77°F). However, be prepared for occasional rain, as 200 mm (7.9 in) of precipitation may fall over approximately 27 days this month. Humidity levels hover around 73%, creating a tropical atmosphere perfect for beachgoers and adventurers alike. Embrace the warmth and enjoy the lush surroundings, as September's weather sets the stage for an unforgettable Jamaican getaway!

September Temperature in Montego Bay

In September, Montego Bay, Jamaica, enjoys a tropical embrace with temperature trends that continue the warm vibes of the summer months. The minimum temperature hovers around 25°C (77°F), while the average settles at a balmy 28°C (82°F), reaching a comfortable maximum of 32°C (90°F). This slight dip compared to the peak summer months signifies the gradual transition towards the fall season. The consistency of warmth throughout September makes it an ideal time for beach lovers and adventure seekers alike, ensuring that the island's allure remains irresistible with sun-kissed days and pleasantly warm evenings.

September Weather in Montego Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Montego Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montego Bay, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777798082828282817978
Data source: Temperature data for Montego Bay generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Montego Bay

In September, Montego Bay experiences a significant uptick in rainfall, with precipitation reaching 200 mm (7.9 in), making it one of the wettest months of the year. This increase in rain is accompanied by 27 precipitation days, suggesting that while rain is frequent, it often comes in shorter bursts throughout the month. This pattern of tropical downpours leads into a wetter autumn season, setting the stage for an even rainier October. As summer fades, September marks the transition to a period where lush greenery flourishes, and the vibrant landscape of Jamaica is illuminated by the harmonious interplay of sun and rain.

September Precipitation Trends in Montego Bay

The chart displays monthly precipitation patterns in Montego Bay, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Montego Bay, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec57428111424014314316620020913956
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Montego Bay

As summer transitions into autumn, September in Montego Bay, Jamaica, sees humidity levels stabilizing at 73%. This consistency reflects a broader trend throughout the year, where humidity generally hovers in the low to mid-70s. Notably, September's humidity mirrors that of the preceding months of August and October, suggesting a period of mild, tropical comfort before the slight uptick in November. While the year's peak humidity is seen in late fall, with levels rising to 76%, September offers a balanced atmosphere, making it an inviting time to experience the island’s scenic beauty without feeling overwhelmed by sticky heat.

September Average Humidity in Montego Bay

This chart illustrates the average monthly humidity levels in Montego Bay, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Montego Bay is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%72%71%72%69%70%72%73%73%74%76%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Montego Bay

In September, Montego Bay, Jamaica experiences a UV Index of 12, positioning it in the extreme exposure category with a burn time of just 10 minutes. This trend follows the peak summer months, where the UV Index remained consistently high at 13, reflecting a strong sun intensity that requires sun protection. As the year progresses into the fall, the UV levels slightly reduce but still remain significant, especially when compared to the lower indices seen in the winter months. Visitors and residents should remain vigilant about sun safety practices during this time. For more detailed information, check the Montego Bay UV Index.

Maximum UV Index Levels in Montego Bay for September

The chart shows the monthly maximum UV Index (UVI) for Montego Bay in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Montego Bay typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313131313121298
Data source: Montego Bay September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Montego Bay

September in Montego Bay, Jamaica, shines brightly with 315 hours of sunshine, making it a delightful time for sun-seekers. As summer transitions into autumn, the sunshine hours remain impressive, although slightly less than July's peak of 349 hours. While August maintains a robust 335 hours, September offers a warm embrace, ensuring plenty of opportunities for beach lounging and exploration. This month, although not the sunniest of the year, continues the trend of ample sunlight that characterizes Jamaica, presenting a charming backdrop for your tropical getaway. With moderate sunlight levels decreasing gradually into October's 305 hours, September serves as a beautiful reminder to enjoy the vibrancy of the Jamaican sun before the year winds down.

Monthly Sunshine Duration in Montego Bay: September Highlighted

The September sunshine duration represents the total number of hours Montego Bay experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec248h300h343h342h330h332h349h335h315h305h288h309h
Data source: Montego Bay September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Montego Bay During September

September in Montego Bay, Jamaica, offers a 50% chance of sunny weather, mirroring the warmth of January and April. This month sits in the middle of the spectrum, with a notable drop in sunshine probability during the summer months of June (40%), July (47%), and August (42%). As the tropical heat begins to wane into October, the chances of sun dip slightly to 43%. Overall, September presents a mix of sunny days and possibilities for rain, but its sun probability aligns with the shoulder months of the year, making it a favorable choice for those seeking to embrace the vibrant coastal beauty of Jamaica.

Percentage of Sunny Days in September in Montego Bay

The chart illustrates the percentage of sunny days in Montego Bay throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Montego Bay experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec51%78%66%51%58%40%47%42%51%43%37%66%
Data source: Montego Bay September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Montego Bay in September

In September, Montego Bay enjoys a delightful 12 hours of daylight, a continuation of the summer brightness that peaks in June and July with 13 hours. This pattern reflects a gradual transition as the days shorten slightly toward the fall. Following August's 12-hour days, September maintains this balance, providing plenty of sunlight for beach outings and outdoor adventures. As the year progresses into October, daylight begins to wane again, returning to 11 hours, marking the onset of autumn. The consistent daylight hours in these vibrant months showcase the tropical charm of Jamaica, making it an ideal destination for sun-seekers year-round.

Average Daylight Hours in Montego Bay for September

The chart illustrates the variation in daylight duration in Montego Bay throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 8m11h 32m12h 2m12h 33m12h 59m13h 12m13h 5m12h 42m12h 12m11h 41m11h 14m11h 1m
Data source: Montego Bay daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Montego Bay

As the sun dips into the tranquil waters of Montego Bay, September brings a noticeable shift in the gentle breezes that characterize the coastline. With an average wind speed of just 2.3 m/s (5 mph), the month marks the calmest period of the year, a contrast to the more invigorating winds of earlier months. Following the seasonal peak in January, when gusts reach 3.8 m/s (8 mph), the winds gradually decrease, tapering off in summer before hitting their lowest in September. This serene atmosphere creates an ideal backdrop for leisurely beach days and tranquil sunset views, making it a perfect time for visitors seeking a peaceful escape. As October approaches, winds remain mild, suggesting that the laid-back vibe of September lingers just a while longer before the seasons turn again.

Average September Wind Speed in Montego Bay

The chart displays monthly wind speed patterns in Montego Bay, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.83.63.53.02.92.93.43.22.3 m/s2.12.84.0
Data source: Montego Bay September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Montego Bay Compares to Other Months

Weather in Montego Bay varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Montego Bay, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January present distinctly different weather patterns. In September, temperatures are typically higher, ranging from a minimum of 25°C (77°F) to a maximum of 32°C (90°F), with an average of 28°C (82°F). This month also sees significant rainfall, with around 200 mm (7.9 inches) spread across 27 days, resulting in high humidity levels around 73%. In contrast, January offers a cooler climate, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 30°C (86°F) and an average of 25°C (77°F). This month experiences considerably less precipitation, totaling about 57 mm (2.2 inches) over 12 days, and maintains a similar humidity level at 74%. For more detailed information on January weather, you can check Montego Bay weather in January.

In September, the weather tends to be warmer and more humid compared to February, with average temperatures hitting around 28°C (82°F) and maximums reaching up to 32°C (90°F). Additionally, September experiences significant rainfall, totaling approximately 200 mm (7.9 in) over 27 days, resulting in a steamy 73% humidity level. In contrast, February boasts milder temperatures, with average highs around 25°C (78°F) and maximums of 30°C (87°F). Rainfall is substantially lower in February, at just 42 mm (1.7 in) over 15 days, accompanied by a similar humidity level of 72%. For more specific insights about February weather, visit Montego Bay weather in February.

September and March present contrasting weather conditions. September boasts warmer temperatures, with a minimum of 25°C (77°F) and an average of 28°C (82°F), reaching a maximum of 32°C (90°F). However, it is also significantly wetter, with 200 mm (7.9 in) of precipitation spread over 27 days and a humidity level of 73%. In contrast, March features milder temperatures, ranging from a minimum of 21°C (70°F) to a maximum of 30°C (87°F) and an average of 25°C (78°F). Additionally, March experiences much less rainfall, only 81 mm (3.2 in) over 18 days, with slightly lower humidity at 71%. For more detailed information, check out Montego Bay weather in March.

When comparing the weather in September and April, it's clear that both months offer warm temperatures and relatively high humidity. In September, the temperatures range from a minimum of 25°C (77°F) to a maximum of 32°C (90°F), with an average of 28°C (82°F). However, this month also sees significant rainfall, with 200 mm (7.9 in) over 27 days, resulting in a humidity level of 73%. In contrast, April experiences slightly lower temperatures, with a minimum of 22°C (72°F) and an average of 26°C (79°F), peaking at 33°C (91°F). Furthermore, April is drier, receiving only 114 mm (4.5 in) of precipitation across 19 days, while maintaining a comparable humidity of 72%. For more detailed information on the weather during this month, you can check out Montego Bay weather in April.

When comparing the weather in September and May, we see that both months exhibit warm temperatures, with September having slightly higher averages. September's temperatures range from a minimum of 25°C (77°F) to a maximum of 32°C (90°F), while May offers a minimum of 23°C (74°F) and the same maximum. Interestingly, both months experience high humidity, with September at 73% and May a touch lower at 69%. In terms of precipitation, September receives about 200 mm (7.9 in) over 27 days, while May sees a bit more rainfall at 240 mm (9.4 in) over 23 days. For those interested in a more detailed look at May conditions, I recommend visiting Montego Bay weather in May.

When comparing September and June weather, both months feature similar average temperatures, hovering around 28°C (82°F). However, September experiences slightly warmer maximum temperatures, reaching up to 32°C (90°F), compared to June's peak of 33°C (91°F). Notably, September is also wetter, with 200 mm (7.9 in) of precipitation over 27 days, compared to June's 143 mm (5.6 in) and 21 days of rain. Humidity is slightly higher in September at 73%, compared to 70% in June. For more specific details about June weather, you can visit Montego Bay weather in June.

When comparing the weather in September to that of July, both months exhibit warm temperatures with minimal variation. In September, the temperatures range from a minimum of 25°C (77°F) to a maximum of 32°C (90°F), averaging around 28°C (82°F). Similarly, July also sees a minimum of 25°C (77°F) and an average of 28°C (83°F), but with a slightly higher maximum of 33°C (91°F).

However, September brings significantly more rainfall, with precipitation totaling 200 mm (7.9 in) over 27 days, compared to July's 143 mm (5.6 in) over 23 days. Humidity levels remain consistent, with September at 73% and July at 72%. For more specific details, you can check Montego Bay weather in July.

In comparing the weather between September and August, we see that both months share a similar temperature range, with minimums at 25°C (77°F), averages around 28°C (82-83°F), and maximums peaking at 32°C (90°F). However, September experiences slightly higher precipitation, with 200 mm (7.9 in) falling over 27 days, compared to August's 166 mm (6.5 in) over 28 days. Despite the similar humidity levels of 73% in both months, the increased rainfall in September may lead to a noticeably wetter atmosphere. For more detailed insights, check Montego Bay weather in August.

September and October in Montego Bay exhibit similar weather patterns, with only slight variations. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 32°C (90°F), with an average of 28°C (82°F). The month sees significant rainfall, totaling around 200 mm (7.9 in) over 27 days, while humidity remains steady at 73%. In contrast, October features slightly cooler temperatures, with a minimum of 24°C (76°F) and an average of 27°C (81°F), although the maximum temperature remains the same at 32°C (89°F). Precipitation increases slightly to 208 mm (8.2 in) over 25 days, maintaining the humidity level at 73%. For more detailed information, you can check out Montego Bay weather in October.

In September, the weather is typically warmer, with average temperatures around 28°C (82°F) and maximum highs reaching 32°C (90°F). It also tends to be wetter, with 200 mm (7.9 in) of precipitation over 27 days, contributing to a high humidity level of 73%. In contrast, November sees slightly cooler temperatures, averaging 26°C (80°F) and peaking at 31°C (87°F). The month is also drier, with 139 mm (5.5 in) of rainfall across 21 days and a humidity level of 76%. For more detailed information, you can check Montego Bay weather in November.

In September, the weather is typically warmer and wetter, with average temperatures ranging from a minimum of 25°C (77°F) to a maximum of 32°C (90°F), accompanied by significant precipitation of 200 mm (7.9 in) over 27 days. High humidity levels at 73% add to the tropical feel of the month. In contrast, December experiences milder temperatures, with an average minimum of 22°C (72°F) and a maximum of 30°C (86°F). Rainfall decreases substantially to just 56 mm (2.2 in) over 14 days, while humidity remains slightly higher at 75%. Overall, December provides a more comfortable climate with less rain. For those interested in detailed information, you can explore Montego Bay weather in December.

Compare Montego Bay's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Montego Bay

As September unfolds in Montego Bay, the warmth is palpable with temperatures averaging around 28°C (82°F), making it one of the warmer months. However, this vibrancy comes with an increase in precipitation, as the region experiences heightened rainfall with nearly 27 days of wet weather throughout the month. The humidity also rises, creating a muggy atmosphere that sets September apart from the drier months. For those seeking to explore the unique climatic conditions of the area, learning more about the local environment can enhance the travel experience—check out the detailed insights at Montego Bay Climate.