Last updated: January 18, 2025
Saint John, Barbados experiences a tropical monsoonal climate classified under the Köppen-Geiger system as Am. Characterized by warm temperatures year-round, the minimum reaches a balmy 23°C (74°F) in February, while the average temperature hovers around 27°C (80°F). During the peak of summer in September, temperatures can peak at 29°C (85°F), providing a consistently warm environment that significantly contributes to the region's vibrancy and lush biodiversity.
The temperature patterns in Saint John, Barbados exhibit a consistent tropical warmth throughout the year, with mild variations across the seasons. During the January to March period, temperatures are slightly cooler, featuring minimums around 23-24°C (74-75°F), while average highs remain steady at approximately 26-27°C (78-81°F). As spring transitions into summer from April to July, a gradual increase is noted, with minimum temperatures shifting to 25°C (76°F) and maximums peaking at 29°C (84°F) by mid-summer. The warmest months—August and September—sustain these highs, though average temperatures stabilize around 27-28°C (81-82°F), showcasing the region's tropical climate. October to December sees a slight cooling trend, as temperatures dip back to the 24-25°C (75-78°F) range, yet remain comfortably warm, illustrating the steady warmth characteristic of Saint John's climate.
In Four Cross Roads, temperatures range from a minimum of 23°C (74°F) in February to a maximum of 29°C (85°F) in September, showcasing a mild climate throughout the year. For more detailed information, you can check the monthly temperatures in Four Cross Roads here.
Saint John's precipitation patterns reveal a clear distinction between the drier and wetter months, characteristic of its tropical climate. The year begins with relatively low rainfall, with January and February receiving 40 mm (1.6 in) and 30 mm (1.2 in), respectively, resulting in 13 and 12 rainy days. As spring approaches, March and April see minor fluctuations, with 33 mm (1.3 in) and 24 mm (1.0 in) of rain falling over 12 and 9 days. However, May marks the onset of a significant increase in rainfall, bringing 41 mm (1.6 in) and signaling the transition into the wet season.
The peak rainfall months span from June through October, where precipitation rises sharply, particularly in July and August, with 126 mm (5.0 in) and 164 mm (6.4 in) recorded, accompanied by 22 and 24 rainy days. September and October also contribute extensively to the totals, reporting 154 mm (6.1 in) and 177 mm (7.0 in), respectively. Despite the overall increase in rainfall during these months, the annual average maintains a tropical allure, leading to lush landscapes and a vibrant ecosystem, before tapering back to milder conditions in November and December, where 123 mm (4.8 in) and 50 mm (2.0 in) received over 20 and 16 days of rain conclude the year.
Saint John, Barbados enjoys a vibrant pattern of sunshine throughout the year, demonstrating a steady increase in sunshine hours as winter transitions to summer. Starting from January, when the region receives 268 hours of sunlight, there is a notable upward trend, with February recording 304 hours and March further increasing to 345 hours. This rising trajectory continues into April and May, where sunshine hours peak at 336 and 349 hours, respectively. The period from late winter to early summer reflects the region’s optimal weather conditions, providing the longest and sunniest days, perfect for outdoor activities and tourism.
Throughout the summer months, sunshine remains plentiful, with July recording 350 hours and August slightly trailing with 343 hours of direct sunlight. However, a slight decline is observed in September and October, with sunshine durations dropping to 322 and 318 hours, respectively. As the year progresses into the cooler months, sunshine hours stabilize around 313 hours in November and 327 hours in December, suggesting a balanced distribution of sunlight even as the days grow shorter. Overall, while the summer is undeniably bright, the year-round sunshine in Saint John ensures a consistently inviting climate that contributes to its lush landscapes and vibrant culture.
The UV Index in Saint John, Barbados reflects a consistently high level of ultraviolet radiation throughout the year, underscoring the region's need for effective sun safety measures. From January to April, the UV Index peaks at 14, categorizing these months in the extreme exposure category, indicating a mere 10 minutes of unprotected sun exposure can lead to skin damage. February and March see the highest readings at 12 and 13, maintaining this extreme classification, which serves as a reminder for residents and visitors to adopt protective strategies such as sunscreen, hats, and protective clothing during these months.
As the year progresses, the UV Index remains elevated, with a slight fluctuation, most notably reaching 14 again in September. The onset of the cooler months in November and December sees a reduction to 10, shifting to a very high exposure category, but still recommending cautious sun exposure with a burn time extending to 15 minutes. Overall, the consistently high UV Index emphasizes the importance of maintaining sun safety measures year-round in Saint John, ensuring both health and well-being while enjoying the region's sunny climate.
UV Risk Categories
In Saint John, Barbados, daylight duration showcases a consistent pattern throughout the year, reflecting the region's proximity to the equator. During the first two months of the year, both January and February see 11 hours of daylight, providing a balanced amount of light amidst the cooler winter months. As the calendar transitions into spring in March, daylight hours increase to 12, and this duration is maintained through June, offering ample sunshine for outdoor activities and exploration.
Following the peak daylight months of March through September, which all boast 12 hours of daylight, there is a gradual return to 11 hours in October, November, and December as the year concludes. This slight decrease in daylight emphasizes the region's stable annual climate, with only minor fluctuations. Overall, the consistent hours of daylight throughout the year not only highlight Saint John's appealing tropical environment but also contribute to the rich natural beauty and vibrant lifestyle of the community.
Four Cross Roads, Barbados, enjoys a tropical climate characterized by warm temperatures and distinct wet and dry seasons. Average monthly temperatures range from 25°C (77°F) in February and March to a maximum of 29°C (84°F) in July and August. The region experiences its highest rainfall from July to October, with October receiving an average of 177 mm (7.0 in). Despite the wet season, sunshine remains abundant, particularly from March to May, where residents can expect over 340 hours of sun each month. For more details, visit Four Cross Roads climate.
In conclusion, the climate of Saint John, Barbados, is characterized by a warm tropical environment, marked by consistent temperatures, abundant sunshine, and significant ultraviolet radiation throughout the year. The precipitation patterns indicate a clear division between the drier and wetter months, while the consistent daylight duration offers ample opportunity for both outdoor activities and exploration of the region's lush landscapes. Understanding these climatic factors is essential for both residents and visitors, as they underscore the importance of effective sun safety practices and highlight the natural beauty that Saint John has to offer, making it a captivating destination year-round.