Last updated: January 18, 2025
Saint John, Antigua and Barbuda, exhibits a tropical rainforest climate characterized by the Köppen-Geiger classification Af. The region experiences a warm and inviting atmosphere year-round, with temperatures ranging from a minimum of 22°C (72°F) in February to a maximum of 29°C (85°F) in October. The average temperature hovers around 26°C (80°F), creating an ideal environment for lush vegetation and vibrant biodiversity. This consistent warmth, combined with ample rainfall, underpins the rich ecological tapestry that defines this Caribbean locale.
In Saint John, Antigua and Barbuda, temperature patterns reflect a stable tropical climate with slight seasonal variations. Throughout the year, minimum temperatures typically range from 22°C (72°F) in February to 25°C (77°F) in July, while maximum temperatures peak at 29°C (84°F – 85°F) during the summer months of July through September. The average temperature remains relatively consistent, hovering around 25°C to 28°C (77°F to 82°F). A gradual warming trend is evident from January to May, culminating in the warmest months of July and August. As the year progresses into the fall, temperatures begin to decrease gradually, yet remain comfortably warm, maintaining the allure of this Caribbean paradise throughout the year.
Cedar Grove, Saint John's, and Potters Village share remarkably similar temperature patterns, with minimum temperatures of 22°C (72°F) in February and maximum temperatures reaching 29°C (85°F) in October. For more details on the climate of each location, you can visit the links: monthly temperatures in Cedar Grove, monthly temperatures in Saint John's, and monthly temperatures in Potters Village.
Saint John, Antigua and Barbuda, experiences a distinct seasonal distribution of precipitation, with a noticeable increase in rainfall during the late summer and early autumn months. January through May witnesses relatively low rainfall, with monthly totals ranging from 30 mm (1.2 in) to 49 mm (1.9 in). This period not only features drier conditions but also comprises fewer rainy days, averaging between 10 to 14 days of rainfall per month. However, as the region transitions into the summer months of July and August, precipitation significantly rises, peaking at 80 mm (3.2 in) in July and escalating to 95 mm (3.7 in) in August, accompanied by an increase in rainy days.
The wettest period occurs from September to October, highlighted by a remarkable 140 mm (5.5 in) of rain in September, which is complemented by 20 rainy days. October also sustains substantial rainfall at 108 mm (4.3 in), with 18 rainy days. This peak in precipitation marks the region's transition into the drier season, which begins in November, where rainfall decreases to 94 mm (3.7 in) and continues to decline into the following months. Overall, despite the seasonal variations, Saint John maintains a lush and vibrant ecosystem throughout the year due to its tropical climate.
In Saint John, Antigua and Barbuda, the annual sunshine duration exhibits a clear seasonal pattern, with a noticeable increase in hours of sunlight from winter to summer. Starting from 262 hours in January, there is a steady rise in sunlight, peaking in July at an impressive 361 hours. The spring months of March and April are particularly radiant, registering 348 hours and 343 hours respectively, and establishing the foundation for the longer days of summer. This trend underscores the region's appeal for sun-seekers, as each subsequent month brings more daylight, providing ideal conditions for outdoor activities and tourism.
As the summer transitions into autumn, sunshine hours remain substantial, with 352 hours in August and beginning to taper off in September to 321 hours. October and November continue this decline, yielding 318 hours and 308 hours, respectively. Although December sees a rebound with 325 hours of sunlight, the overall trend reflects reduced daylight as the year closes. Throughout the year, the robust sunshine hours, particularly from March to September, highlight the tropical climate's allure, fostering an environment rich in vibrant flora and outdoor experiences.
In Saint John, Antigua and Barbuda, the UV Index demonstrates significant seasonal variations, with values often reaching extreme levels, particularly from February to October. Starting at 9 in January, which falls under the "very high" exposure category, the index escalates sharply to 11 in February and peaks at 14 in July. During the peak months from March through June, the UV Index remains consistently high at 13, indicating extreme risk of harm from unprotected sun exposure, with a burn time of only 10 minutes. This underscores the necessity for sun safety precautions, especially during the hotter months.
As the year progresses towards the end, the UV Index begins to decline, falling back to 12 in October and reverting to a "very high" level of 9 in November and December. Despite these lower readings, the burn times in the cooler months still warrant caution, as they stand at 15 minutes for skin sensitivity. Overall, the data highlights the importance of awareness regarding sun exposure throughout the year, particularly during the peak UV periods, to mitigate the risks associated with high UV radiation in this tropical paradise.
UV Risk Categories
In Saint John, Antigua and Barbuda, daylight duration exhibits subtle variations throughout the year, maintaining a generally consistent pattern typical of tropical regions. During the winter months of January and February, residents enjoy roughly 11 hours of daylight each day. As spring approaches, daylight begins to increase, reaching 12 hours from March through May, providing ample sunlight for various outdoor activities and attractions. The transition into summer sees daylight peak at 13 hours in June and July, fostering long, bright days perfect for soaking in the beautiful Caribbean scenery.
As summer yields to autumn, daylight duration gradually returns to 12 hours in August and September, followed by a decrease back to 11 hours from October through December. This cyclical pattern highlights the stability of daylight hours in Saint John, with little fluctuation across the seasons compared to more temperate regions. This consistent availability of sunlight year-round enhances the outdoor lifestyle available in this vibrant Caribbean locale, promoting an active and engaging environment for both locals and visitors alike.
Cedar Grove, Antigua and Barbuda, enjoys a warm tropical climate characterized by consistent temperatures throughout the year, ranging from 22°C (72°F) to 29°C (84°F). The region experiences its highest rainfall in September, with an average of 133 mm (5.2 in), while the months from January to March tend to be drier. Sunshine is abundant, particularly in the spring and summer months, with July providing the most sunshine at 361 hours. Overall, Cedar Grove offers a pleasant climate ideal for outdoor activities year-round. For more detailed information, visit Cedar Grove climate.
Potters Village, Antigua and Barbuda, experiences a tropical climate characterized by warm temperatures year-round. Monthly averages range from 25°C (77°F) in January to around 28°C (82°F) during the warmer months of July and September. Precipitation peaks in September with 144 mm (5.7 in), while sunlight is abundant, especially in March with 348 hours. The region enjoys consistent warmth, making it an appealing destination for visitors. For more details, visit Potters Village climate.
Saint John's, Antigua and Barbuda, experiences a tropical climate with warm temperatures year-round. Average highs range from 26°C (78°F) in the colder months to 29°C (84°F) during the summer, while lows hover between 22°C (72°F) and 25°C (78°F). The region sees the highest precipitation from August to October, with September recording up to 144 mm (5.7 in). Sunshine is abundant, particularly in March and May, offering over 350 hours per month. For detailed climate information, visit Saint John's climate.
In conclusion, Saint John, Antigua and Barbuda, showcases a captivating climate characterized by warm temperatures, significant sunshine, and a pronounced UV Index that underscores the need for sun safety. The consistent daylight hours throughout the year create an inviting atmosphere for outdoor pursuits, while the seasonal variations in precipitation and UV exposure highlight the dynamic nature of this tropical paradise. Visitors and residents alike can fully enjoy the vibrant ecosystem and rich cultural experiences that Saint John has to offer, all while being mindful of the climatic conditions that accompany this idyllic Caribbean setting.