Last updated: August 21, 2025
September in West Bay, Cayman Islands, offers a warm tropical retreat with average temperatures hovering around 28°C (83°F). Visitors can expect daily highs reaching 30°C (86°F) and nightly lows of 26°C (78°F), creating a comfortable climate for outdoor adventures. However, be prepared for the rainy season, as this month witnesses a total precipitation of 102 mm (4.0 in) spread over 18 days, resulting in a humidity level of 75%. Despite the showers, the lush landscapes and vibrant marine life make West Bay a picturesque destination worthy of exploration.
In September, West Bay, Cayman Islands, experiences a delightful blend of warmth and humidity as it transitions toward the end of summer. With minimum temperatures averaging around 26°C (78°F), and a peak reaching a cozy 30°C (86°F), the balmy atmosphere creates an inviting environment for beachgoers and adventurers alike. The average temperature hovers around 28°C (83°F), maintaining the tropical vibe that the islands are renowned for. This month stands out as the temperatures remain consistent with those of August, marking a subtle yet noticeable trend of stability in the region's climate. As the days grow slightly shorter, the warm evenings become perfect for unwinding by the shore, reflecting the charm and allure of the Cayman Islands in September.
In September, West Bay, Cayman Islands experiences considerable rainfall, with an average of 102 mm (4.0 in) accumulated over 18 days. This month typically marks a transition within the rainy season, maintaining a significant level of precipitation that follows the wetter months of May and August, which recorded 130 mm (5.1 in) and 105 mm (4.1 in) respectively. The rainfall in September is a precursor to the even heavier downpours characteristic of October, which sees a staggering 254 mm (10.0 in). This trend suggests not only a peak in tropical weather activity but also a vibrant, lush environment as the island continues to absorb moisture before advancing into a drier season.
As September settles in West Bay, Cayman Islands, the humidity holds steady at 75%, mirroring the levels experienced in the preceding months of August and July. This consistency hints at a trend of relatively stable humidity throughout the late summer. While humidity dips to 73% during May and June, it rebounds in July and August, maintaining a comfortable atmosphere. As the year progresses, a noticeable rise occurs in November and December, where humidity levels climb to 78%, suggesting a shift toward the wetter season. Overall, September's humidity is a pivotal point, marking a balance before the impending increase as winter approaches.
In September, West Bay, Cayman Islands, experiences a high UV Index of 12, indicating an extreme exposure category with a burn time of just 10 minutes. This month maintains the intense sun conditions established in the earlier summer months, with consistent UV levels between 12 to 13 from June through October. As a result, sun protection becomes paramount for locals and visitors alike. Observing these trends, it’s essential to take precautions when enjoying outdoor activities to avoid sunburn and prolonged skin damage. For more detailed information, please visit the West Bay UV Index.
UV Risk Categories
September brings a delightful 322 hours of sunshine to West Bay, Cayman Islands, contributing to an impressive stretch of bright weather. As summer winds down, the sunshine hours reflect a slight dip from the peak of 348 hours in July, yet remain robust compared to the earlier months of the year. This trend illustrates the region's consistently sunny disposition, as even the lower count of September's hours still outshines most months in the winter season. Travelers seeking warmth and vibrant beach days can confidently choose this month, enjoying the lingering glow of summer as it gracefully transitions into autumn.
In September, visitors to West Bay, Cayman Islands, can expect a 52% chance of sunny weather, a slight dip from the summer months of July and August, where averages hover around 51% and 47%, respectively. This trend reflects the transition from the peak of summer to the onset of autumn, bringing with it a moderate balance of sunshine and rain. As summer wanes, the likelihood of clear skies in September stands favorably when compared to the months of June, with only a 39% chance of sunshine, and October, dropping further to 45%. Despite being one of the more uncertain months for sunny days, hopeful beachgoers can still find ample opportunities to bask in the sun during this time of year.
In September, West Bay, Cayman Islands, basks in a delightful 12 hours of daylight, aligning with the tail end of summer when daylight begins to wane. Throughout the year, daylight hours fluctuate, peaking at 13 hours from May to July. As we transition into autumn, the gradual decline in daylight is evident, yet September retains a generous amount of sunlight, comparable to the vibrant days of April and August. This trend showcases the region's tropical charm, offering plenty of opportunities for outdoor activities as the summer heat begins to ease, reminding us of the beauty of this Caribbean paradise before the seasonal shift.
As summer transitions into fall, September in West Bay, Cayman Islands, brings a gentle reprieve with average wind speeds dipping to 4.6 m/s (10 mph). This marks the calmest month of the year, a soft contrast to the brisker gusts felt earlier, such as in January and December, where speeds soar to 6.7 m/s (15 mph) and 7.2 m/s (16 mph), respectively. The gradual decline from the summer months illustrates a typical trend in the region, evidencing a shift toward more tranquil conditions that invite relaxation by the sea. Enjoying the balmy September breezes offers a perfect way to soak in the vibrant atmosphere of the islands as they prepare for the bustling holiday season ahead.
Weather in West Bay varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in West Bay, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing September and January weather, September tends to be warmer with average temperatures around 28°C (83°F) and maximums reaching up to 30°C (86°F). In contrast, January brings cooler conditions, with average temperatures dropping to 26°C (78°F) and maximums at 28°C (82°F). Additionally, September experiences significantly more precipitation, averaging 102 mm (4.0 in) over 18 days, compared to January's 39 mm (1.5 in) over just 11 days. Both months have similar humidity levels, with September at 75% and January slightly higher at 77%. For more detailed information about January weather, you can visit West Bay weather in January.
When comparing the weather in September and February, a noticeable difference in temperature and precipitation emerges. September boasts a higher average temperature, with a minimum of 26°C (78°F) and a maximum of 30°C (86°F), while February offers milder temperatures, ranging from a minimum of 21°C (70°F) to a maximum of 27°C (81°F). Additionally, September experiences significantly more rainfall, totaling 102 mm (4.0 in) over 18 days, compared to February's 24 mm (1.0 in) spread over just 8 days. Humidity levels remain quite similar, with September at 75% and February slightly higher at 76%. For more detailed weather insights, check out West Bay weather in February.
In September, the weather tends to be warmer, with average temperatures around 28°C (83°F) and maximums reaching up to 30°C (86°F). In contrast, March experiences milder conditions, with an average temperature of 26°C (79°F) and maximums only reaching 27°C (82°F). Additionally, September typically sees much more rainfall, with 102 mm (4.0 in) spread over 18 days, compared to March, which has only 19 mm (0.8 in) of precipitation over 6 days. The humidity levels are similar between the two months, hovering around 74-75%. For more detailed weather statistics, you can check West Bay weather in March.
When comparing the weather in September and April, September tends to be warmer with average temperatures ranging from a minimum of 26°C (78°F) to a maximum of 30°C (86°F), while April has slightly cooler temperatures, peaking at 28°C (84°F). Additionally, September experiences significantly more rainfall, with 102 mm (4.0 in) over 18 days, compared to April's 25 mm (1.0 in) over just 7 days. Despite the differences in temperature and precipitation, both months maintain a consistent humidity level of 75%. For more specific details on April weather, you can check West Bay weather in April.
In comparing the weather of September and May, both months present warm temperatures, but September tends to be slightly warmer. September has a minimum temperature of 26°C (78°F) and averages 28°C (83°F), reaching a maximum of 30°C (86°F). In contrast, May starts at a minimum of 25°C (76°F) and averages 27°C (81°F), peaking at 29°C (84°F). Precipitation is more pronounced in May with 130 mm (5.1 in) over 15 days compared to September's 102 mm (4.0 in) spread over 18 days. Humidity levels are fairly similar, with September at 75% and May slightly lower at 73%. For further details on weather conditions in May, you can visit West Bay weather in May.
In comparing the weather between September and June, one can observe some notable similarities and differences. Both months feature comfortable average temperatures, with June showing a minimum of 25°C (78°F) and an average of 28°C (82°F), while September has a slightly higher minimum of 26°C (78°F), with an average of 28°C (83°F). Precipitation levels are also higher in September, with 102 mm (4.0 in) over 18 days, compared to June's 87 mm (3.4 in) over just 12 days. Furthermore, September tends to be a bit more humid at 75%, while June is slightly less humid at 73%. For those looking for detailed information about June weather, visit West Bay weather in June.
In comparing the weather between September and July, we find that both months have similar temperature ranges, with September slightly warmer at a minimum of 26°C (78°F) compared to July's 25°C (77°F). Both months maintain an average temperature of 28°C (83°F) and peak at a maximum of 30°C (86°F). However, September experiences significantly more rainfall, totaling 102 mm (4.0 in) over 18 days, while July sees only 55 mm (2.2 in) across 14 days. Interestingly, the humidity levels remain constant at 75% for both months. For more details on July's weather patterns, visit West Bay weather in July.
In comparing the weather between August and September, both months exhibit similar temperatures, with September's minimum temperature slightly higher at 26°C (78°F) compared to August's 25°C (77°F). The average temperatures are nearly identical, with September averaging 28°C (83°F) and August at 29°C (84°F), while the maximum temperature remains constant at 30°C (86°F) for both months. Precipitation is slightly less in September with 102 mm (4.0 in) over 18 days, compared to August's 105 mm (4.1 in) over 16 days. Interestingly, humidity levels remain steady at 75% for both months, contributing to the tropical feel. For more specific details about August weather, you can check this West Bay weather in August.
In comparing the weather between September and October, both months experience similar temperature ranges, with minimums around 25-26°C (78°F), averaging about 28°C (82-83°F), and maximums peaking at 30°C (86°F). However, October is notably wetter, receiving a substantial 254 mm (10.0 in) of precipitation over 23 days compared to September's 102 mm (4.0 in) over just 18 days. Humidity levels remain consistent at 75% for both months, creating a similarly tropical feel. For more specifics, you can check out West Bay weather in October.
In comparing the weather between September and November, September tends to be warmer with average temperatures reaching up to 28°C (83°F) and maximums of 30°C (86°F). The month experiences a significant amount of rain, totaling 102 mm (4.0 in) over 18 days, coupled with a humidity level of 75%. In contrast, November sees slightly cooler conditions, with average temperatures of 27°C (81°F) and maximums of 29°C (84°F), but it has a higher rainfall of 174 mm (6.9 in) also spread across 18 days. The humidity in November rises modestly to 78%, making it feel a bit more humid than September. For a detailed look at the weather specifics for the month of November, check out West Bay weather in November.
In September, the weather is typically warmer, with average temperatures around 28°C (83°F) and highs reaching 30°C (86°F). This month also sees higher precipitation levels, with 102 mm (4.0 in) spread across 18 days, along with a humidity level of 75%. In contrast, December experiences milder temperatures, averaging 26°C (80°F) and peaking at 28°C (83°F), making it more comfortable overall. Rainfall is significantly lower in December, totaling 46 mm (1.8 in) over 12 days, with humidity slightly higher at 78%. For more detailed information, you can check West Bay weather in December.
As September unfolds in West Bay, the weather takes on a unique character distinct from the rest of the year. With its warm temperatures averaging around 28°C (83°F) amid high humidity levels, this month feels notably sultry. Additionally, September is marked by increased precipitation, with rain gracing the region on nearly two-thirds of the days. This combination of warmth and rain contributes to the lush, tropical ambiance typical of the Caribbean during this time. For those interested in a more in-depth exploration of West Bay's climate patterns, visit West Bay Climate.