Last updated: August 21, 2025
September in George Town, Cayman Islands is characterized by warm tropical conditions, with maximum temperatures reaching around 30°C (86°F) and an average of 28°C (83°F). Visitors can expect balmy evenings with minimum temperatures around 26°C (78°F). This month sees approximately 104 mm (4.1 in) of rainfall spread over 18 days, contributing to a high humidity level of 75%. While occasional showers may be a norm, the lush landscapes and vibrant culture continue to charm those who explore this beautiful Caribbean destination.
In September, George Town, Cayman Islands embraces the lingering warmth of summer with temperatures that reflect a consistent trend throughout the year. With a minimum temperature of 26°C (78°F) and an average of 28°C (83°F), the month remains comfortably balmy, peaking at a maximum of 30°C (86°F). This slight uptick from August indicates that the region is still very much in the throes of summer heat, while the evenings offer a soothing respite. As the transition to autumn begins, visitors can expect vibrant days filled with sunshine, perfect for beach activities or exploring the local culture. The warm, tropical climate makes September an ideal time to enjoy the stunning natural beauty and laid-back vibe of the islands.
September in George Town, Cayman Islands, marks a significant transition in the precipitation pattern, with 104 mm (4.1 in) of rainfall spread over 18 days. This month sees the region experiencing a near peak in rainfall, closely following August's figures. The consistency in wet days continues throughout September, contributing to the overall trend of increased precipitation following the drier months earlier in the year. As the island transitions from summer to autumn, the rainfall not only enhances the lush greenery but also signals the onset of more substantial downpours, evident in the surging totals leading into October, which averages a striking 249 mm (9.8 in). This pattern illustrates the Caribbean's seasonal rhythm, where September stands out as a month of substantial rainfall, enhancing the region's vibrant natural beauty.
In September, George Town, Cayman Islands, experiences humidity levels that remain steady at 75%, reflecting a pattern of relative consistency seen throughout the year. Though the humidity dips slightly from the peak summer months of July and August, which also hold at 75%, it marks a continuation of the tropical feel that characterizes the region. Interestingly, the humidity begins a gradual rise in the months following September, culminating in the heavier air of November and December, when levels reach 78%. This trend showcases the islands' lush, tropical environment, making September a transitional month as the humidity levels prepare to climb once more into the fall.
In September, the UV Index in George Town, Cayman Islands, reaches a notable 12, placing it in the extreme exposure category, where you can expect to burn in just 10 minutes. This trend of high UV readings continues from the peak of summer, maintaining an impressive strength that averages between 12 and 13 from April to August. While it dips slightly in October, it remains in the extreme category. Be sure to take necessary precautions when basking in the tropical sun during this time. For more detailed information, check out the George Town UV Index.
UV Risk Categories
In September, George Town, Cayman Islands, enjoys a delightful average of 322 hours of sunshine, continuing the trend of abundant daylight seen throughout the summer months. Following the peak of 349 hours in July, the sunshine hours slightly diminish as autumn approaches, yet September still boasts ample sunshine, rivaling the warmth of the vibrant summer. This gradual decline in hours is typical as the year transitions, with October expected to see a further decrease to 295 hours. Overall, September offers a perfect blend of sunny days ideal for beach outings and exploring the island, making it an appealing time for visitors seeking a tropical escape.
September in George Town, Cayman Islands, offers a moderate 53% chance of sunny weather, continuing the trend of somewhat unpredictable conditions typical for the late summer. While this percentage is slightly above average compared to the summer months of June (40%) and July (51%), it falls short of the brighter skies seen in the earlier months of the year, like February (78%) and March (79%). As tourists flock to the island looking for sun, September finds itself in a transitional phase; the tail end of summer invites occasional rainfall, yet the sunshine remains a delightful companion. The weather in this vibrant locale is always a mix, but those visiting in September can still expect ample opportunities to bask in the Caribbean sun.
In September, George Town, Cayman Islands, basks in 12 hours of daylight, marking a gentle transition as summer wanes. This duration maintains the same level as August, offering plenty of sunshine for outdoor activities and exploration. As the year progresses, daylight hours peak at 13 hours during the summer months of May through July, then gradually decline towards the end of the year. With each passing month from October to December, the days shorten significantly, highlighting the island's optimal sunlight during the warm summer months while providing a charming shift into the cozy, shorter days of fall and winter.
In September, the winds in George Town, Cayman Islands, tend to whisper rather than roar, averaging a gentle 4.5 m/s (10 mph)—the calmest of the year. This shift from the breezier months of summer, where winds hovered around 5.8 m/s to 5.9 m/s, signals a subtle transition as the island approaches the peak of the hurricane season. As the year progresses into October, wind speeds only slightly increase to 4.6 m/s (10 mph), maintaining that tranquil late-summer atmosphere. In contrast, the months leading up to September feature more robust currents, peaking in December with a lively 7.2 m/s (16 mph). This cyclical pattern of wind speed not only shapes the island's weather but also enhances the serene allure of September, making it a perfect time for relaxation amidst the soft caress of warm breezes.
Weather in George Town varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in George Town, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures are noticeably warmer, with averages around 28°C (83°F) and daily highs reaching up to 30°C (86°F). This month is also characterized by higher precipitation, with about 104 mm (4.1 in) of rain spread over 18 days, coupled with a humidity level of 75%. In contrast, January experiences cooler temperatures, with an average of 26°C (78°F) and maximums peaking at 28°C (82°F). The rainfall in January is significantly less, totaling only 41 mm (1.6 in) over 11 days, with humidity slightly higher at 77%. For a detailed look at the weather in January, you can refer to the link: George Town weather in January.
September and February present distinct weather patterns, with September typically being warmer and wetter than February. In September, temperatures range from a minimum of 26°C (78°F) to a maximum of 30°C (86°F), accompanied by high humidity at 75% and substantial rainfall totaling 104 mm (4.1 in) over 18 days. In contrast, February offers milder conditions, with temperatures ranging from a minimum of 21°C (71°F) to a maximum of 27°C (81°F) and much less precipitation at only 25 mm (1.0 in) over 9 days, alongside a similar humidity level of 76%. For more specific information, you can check George Town weather in February.
In comparing the weather between September and March, it’s evident that September is generally warmer and wetter. During September, temperatures range from a minimum of 26°C (78°F) to a maximum of 30°C (86°F), with an average of 28°C (83°F). Additionally, this month experiences significant precipitation, totaling 104 mm (4.1 in) over 18 days, and maintaining a high humidity level of 75%. In contrast, March presents a slightly cooler climate, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 28°C (82°F) and an average of 26°C (79°F). Rainfall is considerably less in March, totaling only 19 mm (0.8 in) over just 6 days, along with a humidity level of 74%. For a more detailed look at March weather, visit George Town weather in March.
September and April showcase notable differences in weather, with September generally being warmer and wetter than April. In September, temperatures range from a minimum of 26°C (78°F) to a maximum of 30°C (86°F), accompanied by an average temperature of 28°C (83°F). The month also experiences significant rainfall, with a total precipitation of 104 mm (4.1 in) spread over 18 days. In contrast, April sees cooler temperatures, with a minimum of 24°C (75°F) and a maximum of 28°C (83°F), averaging 26°C (80°F). Precipitation in April is much lower, totaling only 26 mm (1.0 in) over just 7 days, while the humidity remains consistent at 75%. For more detailed insights on April weather, visit George Town weather in April.
In comparing the weather of September and May, we find that September is slightly warmer, with average temperatures ranging from a minimum of 26°C (78°F) to a maximum of 30°C (86°F), as opposed to May, which has temperatures from 24°C (76°F) to 29°C (84°F). September also experiences higher precipitation levels, with 104 mm (4.1 in) spread over 18 days, while May has 130 mm (5.1 in) over 15 days. Humidity in September is marginally higher at 75%, compared to May's 73%. For more detailed information, you can check George Town weather in May.
In comparing the weather between September and June, both months exhibit similar average temperatures, with September showing a slight increase in maximum temperature at 30°C (86°F), compared to June's maximum of 29°C (85°F). However, September experiences higher humidity at 75% and significantly more precipitation, with 104 mm (4.1 in) over 18 days, while June has 96 mm (3.8 in) spread across just 12 days. This makes September feel more humid and wetter than June, providing a more tropical atmosphere overall. For a detailed look at June weather specifically, you can refer to George Town weather in June.
In comparing the weather of September and July, we can see that both months have similar temperature ranges, with minimum temperatures around 25-26°C (78°F), average temperatures at 28°C (83°F), and maximum temperatures reaching up to 30°C (86°F). However, September experiences significantly higher precipitation, totaling 104 mm (4.1 in) over 18 days compared to July’s 58 mm (2.3 in) over just 14 days. Interestingly, both months share the same humidity level of 75%, creating a consistently muggy environment. For more details on July weather specifically, you can refer to George Town weather in July.
In comparing the weather of September and August, both months experience warm temperatures, with September showing a slightly higher minimum temperature of 26°C (78°F) compared to August's 25°C (77°F). The average temperature in September is 28°C (83°F), just a degree cooler than August's 29°C (84°F). Interestingly, both months have the same maximum temperature of 30°C (86°F in September and 87°F in August). Precipitation remains consistent, with September receiving 104 mm (4.1 inches) over 18 days, while August records slightly more rain at 105 mm (4.1 inches) over 15 days. Humidity remains unchanged at a notable 75% for both months, suggesting a persistent tropical feel. For a detailed look at August weather, check out George Town weather in August.
In September, the weather in George Town consists of warm temperatures, with a minimum of 26°C (78°F) and an average of 28°C (83°F), peaking at a comfortable 30°C (86°F). However, September experiences significant rainfall, totaling 104 mm (4.1 in) over 18 days, coupled with a consistent humidity level of 75%.
In contrast, October maintains similar temperatures, with a minimum of 25°C (77°F) and an average of 28°C (82°F), while still reaching a maximum of 30°C (86°F). The month is notably wetter, with precipitation increasing to 249 mm (9.8 in) over 22 days, yet humidity remains steady at 75%. For a more detailed look at October’s weather patterns, you can visit George Town weather in October.
In September, the weather is characterized by warm temperatures with minimums around 26°C (78°F) and average highs reaching up to 30°C (86°F). However, it experiences considerable rainfall, averaging 104 mm (4.1 in) over about 18 days, with humidity levels at 75%.
By November, the temperatures drop slightly, with minimums at 24°C (76°F) and an average high of 29°C (84°F). While November remains warm, it sees an increase in precipitation to 174 mm (6.8 in) over 17 days, and humidity rises to 78%. For more details on November conditions, you can check George Town weather in November.
In September, the weather is typically warmer with average temperatures around 28°C (83°F) and maximums reaching up to 30°C (86°F). The month also experiences considerable rainfall, with 104 mm (4.1 in) of precipitation over 18 days, and humidity levels hover around 75%. In contrast, December sees milder temperatures, with averages dropping to 26°C (80°F) and maximums peaking at 28°C (83°F). Precipitation is significantly lower in December, totaling just 46 mm (1.8 in) over 12 days, and humidity slightly increases to 78%. For a closer look at what to expect in December, you can check this link: George Town weather in December.
As September rolls into George Town, the weather showcases a blend of warmth and moisture that's distinctly different from other months. Temperatures generally hover in the comfortable range, with highs reaching around 30°C (86°F) and an average that stays at 28°C (83°F), making it a pleasant time for those who enjoy the tropics. However, the humidity takes a significant leap, climbing to about 75%, which can make the warmth feel more intense. Rainfall is frequent this month, with approximately 104 mm (4.1 in) spread across 18 days, adding a lush vibrancy to the island. For a comprehensive look at how September fits into the broader spectrum of the year, check out George Town Climate.