Last updated: October 31, 2025
In January, Gustavia, Saint Barthélemy, experiences a delightful tropical climate, with temperatures ranging from a pleasant 23°C (74°F) to a comfortable 27°C (81°F), and an average of 25°C (78°F). While the month sees 13 days of rainfall, accumulating about 35 mm (1.4 in), the humidity level sits around 77%, adding to the island's lush and vibrant atmosphere. Visitors can enjoy milder weather perfect for exploring sandy beaches and indulging in outdoor activities, all while basking in the beauty of the Caribbean.
In January, Gustavia, Saint Barthélemy experiences pleasantly mild temperatures that set the tone for a tropical paradise. With minimums around 23°C (74°F) and average highs reaching 27°C (81°F), visitors can enjoy warm, inviting weather perfect for beach outings and outdoor dining. This month marks the beginning of a gradual warming trend as spring approaches. Notably, temperatures remain quite stable, with averages hovering at 25°C (78°F), which is mirrored in the following months of February and March. As the days go by, the maximum temperatures inch higher, peaking at 29°C (84°F) by the height of summer in July and August. This consistency in warmth makes January an excellent time for travelers seeking a delightful escape, with conditions that only get sweeter as the year unfolds.
In Gustavia, Saint Barthélemy, January typically experiences a moderate rainfall totaling 35 mm (1.4 in) over approximately 13 days. This consistent precipitation mirrors the patterns observed in February but sets the stage for a gradual increase as the year progresses. As spring approaches, rainfall begins to wane slightly through March and April, before a noticeable uptick occurs from May through October, peaking dramatically in September with 152 mm (6.0 in), often accompanied by the island's hurricane season. This trend highlights the transition from a relatively drier early winter to a wetter mid-year, reflecting the tropical climate's cyclical nature and emphasizing the need for visitors to prepare for both sun and occasional showers during their stay.
In January, Gustavia, Saint Barthélemy, experiences a humidity level of 77%, continuing a trend that remains consistent through February and March. This stable humidity is characteristic of the winter months in the Caribbean, providing a comfortable atmosphere for visitors. As the year progresses into April, a slight increase to 78% sets the stage for the warmer months, with humidity gradually rising to 79% in May. The peak of humidity arrives in the summer, with July reaching 83%. Nonetheless, the island maintains a pleasant feel, with levels starting to dip again by September, settling back to 78% in December. This overall trend highlights Gustavia’s tropical climate, where humidity varies subtly but remains relatively high throughout the year, contributing to its lush landscapes and inviting ambiance.
In Gustavia, Saint Barthélemy, the UV Index peaks in January at a notable 9, indicating a very high exposure category, with a burn time of just 15 minutes. As the year progresses into February and beyond, the index escalates dramatically, reaching an extreme 11 in February and soaring to 13 from March through August. This trend continues into September, before tapering off slightly in October to 12, and returning to 9 by November and December, signaling a return to the very high exposure category. With such intense UV levels for most of the year, it’s crucial to practice sun safety while enjoying the picturesque beaches. For more details on the UV levels throughout the year, check out the Gustavia UV Index.
UV Risk Categories
January in Gustavia, Saint Barthélemy, offers 259 hours of delightful sunshine, setting the stage for a picturesque start to the year. As the months unfold, the sun graces the island with increasing vigor, peaking in May with an impressive 363 hours of sunlight. The summer months continue the trend, with July boasting the most hours at 364, ensuring endless beach days and warm evenings. Following this sunny crescendo, the daylight gradually begins to wane, yet remains generous through the fall, with October and November still providing over 300 hours each. This radiant sequence of sunshine not only highlights the charm of Gustavia but also invites visitors to bask in its warm embrace throughout the year.
In Gustavia, Saint Barthélemy, January boasts a 57% chance of sunny weather, marking it as a promising start to the year. While cloudier months like June (25%) remind us of the island's occasional unpredictability, the sun tends to shine more reliably in early spring, with February and March seeing significantly higher probabilities of sunshine at 71% and 72%, respectively. This trend makes January a delightful option for escaping winter blues, especially when compared to the slightly lower expectations in April (47%). As winter transitions into the brighter months, January offers a sweet spot for sunshine lovers, with the odds leaning favorably towards delightful beach days.
In Gustavia, Saint Barthélemy, January welcomes visitors with 11 hours of daylight, setting a pleasant tone for the month. This steady duration characterizes the winter months, with February mirroring its hours. As spring approaches in March, daylight extends to 12 hours, a trend that continues through April and May, enhancing the island's vibrant atmosphere. By June and July, daylight peaks at 13 hours, offering plenty of sunshine for outdoor adventures. As summer transitions into fall, daylight gradually recedes, returning to 12 hours in August and September, before falling back to 11 hours in October through December. This rhythm of daylight reflects the island's tropical charm, providing a balanced blend of sun and shade throughout the year.
In January, Gustavia, Saint Barthélemy experiences an average wind speed of 6.8 m/s (15 mph), offering a gentle but invigorating breeze that perfectly complements the island's serene landscapes. This calm is short-lived, as the winds pick up noticeably in February, reaching 9.0 m/s (20 mph), signaling the arrival of livelier conditions perfect for sailing and outdoor activities. Throughout the spring, the wind varies slightly, with March seeing 7.3 m/s, before tapering off to 6.4 m/s (14 mph) in April. As the summer months approach, the winds begin to strengthen again, peaking in July at 8.4 m/s (19 mph). Interestingly, a dip occurs in September with a significant drop to 5.3 m/s (12 mph), likely influenced by seasonal weather patterns. However, the winds recover by December, reaching 8.0 m/s (18 mph), ensuring that Gustavia remains a breezy paradise for both visitors and locals throughout the year.
Weather in Gustavia varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Gustavia, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between January and February, we see that both months maintain a warm and humid climate, typical of a tropical environment. January has slightly higher maximum temperatures, averaging 27°C (81°F), while February's highs reach 26°C (80°F). The minimum temperatures are also close, with January starting at 23°C (74°F) and February at a mild 22°C (72°F). Precipitation is consistent across the two months, with both recording 35 mm (1.4 in); however, January experiences rainfall over 13 days compared to February's 11 days. Humidity levels remain the same at 77% for both months. For more detailed information, you can explore Gustavia weather in February.
In January, temperatures range from a minimum of 23°C (74°F) to a maximum of 27°C (81°F), with an average of 25°C (78°F), while March sees slightly cooler temperatures with a minimum of 22°C (73°F) and a maximum of 26°C (79°F). Both months experience similar humidity levels at 77%, but January has a higher precipitation level of 35 mm (1.4 in) over 13 days compared to March's 27 mm (1.1 in) across 10 days. For a more detailed look at the weather in March, you can explore Gustavia weather in March.
In comparing the weather between January and April, both months exhibit remarkably similar temperature ranges, with average temperatures hovering around 25°C (78°F). The minimum and maximum temperatures remain unchanged at 23°C (74°F) and 27°C (81°F), respectively, indicating a consistent warmth throughout this period. Precipitation levels are also closely matched, with January experiencing 35 mm (1.4 in) of rain over 13 days, while April sees a slight decrease to 34 mm (1.3 in) over just 11 days. The humidity levels are almost identical as well, with January at 77% and April slightly higher at 78%. For more detailed insights, you can check Gustavia weather in April.
When comparing the weather of January and May, we find that temperatures in both months are relatively consistent, with January averaging 25°C (78°F) and May slightly warmer at an average of 26°C (79°F). The minimum temperatures remain the same at 23°C (74°F), while the maximum temperatures see a minor increase from 27°C (81°F) in January to 28°C (82°F) in May. In terms of precipitation, May experiences a bit more rain, totaling 47 mm (1.8 in) compared to January's 35 mm (1.4 in), despite having a similar number of rainy days (13 in January and 12 in May). Humidity levels are also quite comparable, with January at 77% and May slightly higher at 79%. For more specific details on the weather during this time, you can visit Gustavia weather in May.
In January, the weather tends to be slightly cooler with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 27°C (81°F), accompanied by a moderate level of precipitation totaling 35 mm (1.4 in) over approximately 13 days. The humidity during this month sits at 77%, creating a comfortable yet warm climate. In contrast, June brings warmer conditions with temperatures from a minimum of 25°C (76°F) to a maximum of 28°C (84°F), and increased rainfall of 49 mm (1.9 in) over 14 days. The humidity rises slightly to 81%, making the atmosphere feel more tropical. For more information about June weather, you can refer to Gustavia weather in June.
In January, the weather is generally warm with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 27°C (81°F) and an average of about 25°C (78°F). There is moderate precipitation with around 35 mm (1.4 in) falling over 13 days and a humidity level of 77%. In contrast, July brings slightly warmer temperatures, with minimums of 25°C (77°F) and maximums reaching 29°C (84°F), averaging at 27°C (81°F). However, the month experiences increased rainfall, totaling 80 mm (3.2 in) over 17 days and higher humidity at 83%. For a detailed look at the weather specifics in July, visit Gustavia weather in July.
When comparing the weather in January and August, January offers slightly cooler temperatures, with an average of 25°C (78°F) compared to August's warmer average of 28°C (82°F). The minimum temperatures in January are also lower, starting at 23°C (74°F), while August begins at 25°C (77°F). January sees 35 mm (1.4 in) of precipitation over 13 days, whereas August experiences a significant increase in rainfall at 86 mm (3.4 in) across 16 days. Humidity levels are relatively high in both months, with January at 77% and August slightly higher at 82%. For more details on the August climate, you can visit Gustavia weather in August.
In January, the weather is quite warm with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 27°C (81°F), accompanied by moderate humidity at 77%. Precipitation during this month is relatively low, averaging 35 mm (1.4 in) over about 13 days. In contrast, September experiences slightly higher temperatures, with minimums at 25°C (77°F) and maximums reaching 29°C (85°F). However, this month sees a significant increase in rainfall, totaling 152 mm (6.0 in) over 22 days, along with a slight rise in humidity to 80%. For more details on the weather specifics, check out Gustavia weather in September.
When comparing the weather in January and October, notable differences emerge. January typically sees milder temperatures, with a minimum of 23°C (74°F) and an average of 25°C (78°F), while October is slightly warmer, with a minimum of 25°C (77°F) and an average of 27°C (81°F). Additionally, October experiences significantly more precipitation, totaling 113 mm (4.4 in) over 19 days, compared to January's 35 mm (1.4 in) over only 13 days. Humidity levels remain relatively similar, with January at 77% and October slightly higher at 79%. For more details, you can refer to Gustavia weather in October.
January and November present similar warmth, but January is slightly cooler overall, with average temperatures ranging from 23°C (74°F) at night to a maximum of 27°C (81°F) during the day. In contrast, November sees slightly higher temperatures, with an average low of 24°C (76°F) and highs reaching 28°C (83°F). Precipitation levels differ significantly as well; January experiences 35 mm (1.4 in) of rain over 13 days, while November receives a much higher total of 95 mm (3.8 in) across 17 days. Humidity is also marginally higher in November at 79%, compared to January's 77%. For more details, you can check Gustavia weather in November.
In January, the weather is slightly cooler compared to December, with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 27°C (81°F). December features higher temperatures, with a minimum of 24°C (75°F) and a maximum of 28°C (82°F), making it the warmer month overall. Precipitation also varies, with January receiving 35 mm (1.4 in) over 13 rainy days, while December sees more rain at 48 mm (1.9 in) across 17 days. Both months maintain high humidity levels, with January at 77% and December slightly higher at 78%. For a closer look at conditions during December, you can check out Gustavia weather in December.
January in Gustavia offers a delightful escape with mild temperatures that are pleasantly warmer compared to the cooler months preceding it. While there is a slight increase in humidity and a few more precipitation days, the overall feel is one of comfortable tropical bliss. Travelers can enjoy an average temperature that makes outdoor activities enjoyable, although visitors should be prepared for occasional light showers. This unique blend of warmth and moisture sets January apart from the drier, hotter months ahead, making it an ideal time for those seeking a refreshing winter getaway. For a deeper dive into what to expect throughout the year, check out the detailed insights on Gustavia Climate.