Last updated: January 18, 2025
Saint Mary, Antigua and Barbuda, experiences a tropical rainforest climate classified under the Koppen-Geiger system (Af). Characterized by a warm and inviting atmosphere, the region sees a minimum temperature of 22°C (72°F) in February, while the average hovers around 26°C (80°F) throughout the year. The temperature peaks at a maximum of 29°C (85°F) in October, reflecting the area's consistent warmth and humidity. This climate fostered by abundant rainfall supports lush vegetation, defining the tropical landscape of this beautiful Caribbean locale.
In Saint Mary, Antigua and Barbuda, temperature patterns reveal a consistent tropical warmth throughout the year, with only slight seasonal variations. The year begins with January's minimum temperatures around 23°C (73°F), gradually dipping to 22°C (72°F) in February before stabilizing around this cooler mark in March and April. As spring progresses into summer, temperatures climb steadily, reaching a peak of 29°C (84°F) during the warmest months of July to October. This period showcases average temperatures of 27°C (81°F) to 28°C (82°F), providing a warm climate ideal for outdoor activities. As the year closes, temperatures gently recede, with December marking a return to a minimum of 24°C (75°F) and an average of 26°C (79°F), ensuring that even the cooler months maintain a delightfully warm ambiance.
Both Bolands and Old Road experience similar temperature ranges throughout the year, with a minimum of 22°C (72°F) in February and a maximum of 29°C (85°F) in October. For more detailed temperature information, visit the links for monthly temperatures in Bolands and monthly temperatures in Old Road.
Precipitation in Saint Mary, Antigua and Barbuda exhibits distinct seasonal variations, reflecting the region's tropical climate. The year begins with relatively low rainfall, as January and February receive about 34 mm (1.4 in) and 36 mm (1.4 in) respectively, showcasing dry conditions. As spring progresses into late April and May, precipitation increases, with May recording a total of 49 mm (1.9 in). This trend continues into June, where rainfall reaches 52 mm (2.0 in), foreshadowing the onset of the wet season.
The peak of precipitation occurs during the late summer and early autumn months, with rainfall escalating significantly in September, where totals soar to 144 mm (5.7 in), accompanied by an increase in rainy days. August also exhibits high precipitation levels at 97 mm (3.8 in), while October sees 109 mm (4.3 in). The wet season tapers off in November with 94 mm (3.7 in), leading into December's precipitation decrease back to 52 mm (2.1 in). This pronounced seasonal fluctuation emphasizes the pronounced rainy season in Saint Mary, contributing to the area's lush tropical landscape.
In Saint Mary, Antigua and Barbuda, sunshine duration exhibits a marked seasonal trend, with a noticeable increase in hours as the year progresses from winter to summer. Beginning with 262 hours in January, the sunlit hours steadily rise throughout the early months, reaching 348 hours in March and peaking at 357 hours in May. As summer approaches, sunshine hours continue to thrive, with July recording the highest at 361 hours. This trend highlights the region's sunny disposition, making it an appealing destination for sunseekers.
As the year transitions into the fall months, sunshine hours slightly decline, but remain substantial. August retains a robust 352 hours, followed by 321 hours in September, a month that still boasts ample sunshine despite the onset of the rainy season. The autumn months of October and November witness a gradual decrease as well, with approximately 318 and 308 hours respectively. By December, sunshine duration is back to a commendable 325 hours, illustrating the island's consistent embrace of sunlight throughout the year. Overall, Saint Mary offers an inviting climate characterized by long sunny days, particularly from late spring through summer.
In Saint Mary, Antigua and Barbuda, the UV Index reflects a pattern of intense solar radiation, indicating the importance of sun safety measures throughout the year. Beginning with a UV Index of 9 in January, the risk of harm from unprotected sun exposure is categorized as very high, allowing for a burn time of just 15 minutes. As February arrives, the situation escalates to an extreme UV Index of 11, where exposure becomes critical, and the burn time decreases to merely 10 minutes. This trend continues sharply into the spring, with March to June consistently presenting an UV Index of 13, solidifying the need for protective measures during these months.
The peak UV Index occurs in July, when it reaches 14, representing one of the highest ultraviolet radiation levels. This extreme exposure category necessitates that individuals limit their time in direct sunlight to a mere 10 minutes without adequate protection. Following this peak, the UV Index slightly decreases but remains at an extreme level through August and September before tapering off to 12 in October. As the year closes, November and December return to a very high UV Index of 9, reminding residents and visitors alike that sun protection is crucial even in the cooler months. Overall, the UV conditions in Saint Mary underscore the need for vigilance against sun exposure, particularly from late winter through mid-summer.
UV Risk Categories
Daylight duration in Saint Mary, Antigua and Barbuda, showcases a relatively stable pattern throughout the year, with minor fluctuations that align with seasonal changes. The year starts with 11 hours of daylight in both January and February, providing a consistent framework for daily activities. As spring approaches, March to May sees an increase in daylight, consistently yielding 12 hours each day. This gradual extension of daylight aligns with the region's warming climate and the approach of summer.
The summer months of June and July mark the peak for daylight duration, each offering 13 hours of sunlight, ideal for outdoor and recreational activities. Following this brief period of elevated daylight, August’s duration falls back to 12 hours, maintaining ample sunlight into autumn. As the year transitions into fall, daylight once again recedes to 11 hours from October through December. Overall, Saint Mary enjoys a generous amount of daylight throughout the year, contributing to its vibrant, sun-soaked environment and providing ample opportunities for exploration and enjoyment.
The climate in Bolands, Antigua and Barbuda is warm and tropical, with temperatures ranging from a minimum of 22°C (72°F) in February to a maximum of 29°C (84°F) in July and August. Rainfall is most prevalent from August to October, peaking at 144 mm (5.7 in) in September. The region enjoys ample sunshine, particularly in March and May, which receive 348 and 357 hours of sun respectively. Overall, Bolands experiences a balance of warm, dry months and a wetter period, ideal for tropical vegetation and outdoor activities. For more details, visit Bolands climate.
Old Road, Antigua and Barbuda experiences warm tropical weather throughout the year, with average temperatures ranging from 25°C (77°F) in cooler months to 28°C (82°F) in the peak summer. The region sees an increase in rainfall from May to September, with September being the wettest month at 144 mm (5.7 in). Despite higher precipitation, Old Road enjoys a substantial amount of sunshine, particularly in May and July, which record over 350 hours. The consistent warmth and sunshine make it an attractive destination year-round. For more details, visit Old Road climate.
In conclusion, Saint Mary, Antigua and Barbuda, presents an inviting climate characterized by warm temperatures, abundant sunshine, and significant daylight duration throughout the year. The region's tropical rainforest climate, combined with a pronounced rainy season, creates a lush and vibrant landscape that attracts visitors and supports diverse ecosystems. With a high UV Index, especially during the summer months, awareness and protection against sun exposure are essential for maintaining health and safety. Collectively, these climatic factors not only define the charm of Saint Mary as a tropical paradise but also emphasize the need for sustainable practices to preserve its natural beauty and ensure the well-being of both residents and tourists alike.