Last updated: January 18, 2025
Saint George, Dominica, exhibits a tropical rainforest climate classified under the Köppen-Geiger system as Af. Characterized by consistently warm temperatures, the region experiences a minimum of 22°C (71°F) in February, while the average temperature hovers around 26°C (79°F). The warmest month, September, sees maximum temperatures reaching 29°C (84°F), contributing to a lush, vibrant ecosystem supported by the frequent precipitation typical of rainforest environments. This climatic stability fosters rich biodiversity, making Saint George a notable location for ecological study and tourism.
In Saint George, Dominica, temperature patterns exhibit a consistent warm climate throughout the year, with mild variations between the seasons. The minimum temperatures remain relatively stable, starting at 22°C (72°F) in January and gradually increasing to 25°C (77°F) by September. Average monthly temperatures hover around 25°C (77°F) to 27°C (81°F), reflecting a slight rise during the peak summer months of August and September, when maximum temperatures reach their highest at 29°C (84°F). As the year progresses into the cooler months of December and January, temperatures slightly decline, yet remain comfortably warm. This climatic stability, characterized by minimal fluctuations, supports a vibrant ecosystem and creates an inviting environment for residents and visitors alike.
In Roseau, temperatures range from a minimum of 22°C (72°F) in February to a maximum of 29°C (84°F) in September, while in Castle Comfort, the temperatures similarly start at a minimum of 22°C (71°F) in February, peaking at 28°C (83°F) in September. For detailed monthly temperature information, visit monthly temperatures in Roseau and monthly temperatures in Castle Comfort.
Saint George, Dominica, experiences a dynamic precipitation pattern across the year, with a distinct wet season that significantly influences its climate. During the first half of the year, rainfall averages remain relatively low, with January to April receiving between 42 mm (1.6 in) and 47 mm (1.9 in) over approximately 12 to 16 days of rainfall each month. May experiences a slight uptick, maintaining similar levels before entering a more pronounced wet season starting in June.
From June onward, precipitation dramatically increases, peaking in October with 142 mm (5.6 in) of rain over 21 days. This surge is characterized by high humidity and more frequent rainfall, particularly in August and September, when averages reach 130 mm (5.1 in) and 127 mm (5.0 in) respectively. By December, rainfall begins to taper off to 70 mm (2.7 in), yet the heavy downpours from the previous months culminate in a lush, vibrant landscape, essential for the region's rich biodiversity.
In Saint George, Dominica, sunshine duration reveals a clear seasonal trend, with hours of sunlight steadily increasing from winter into summer. The year begins with a modest 267 hours of sunshine in January, gradually rising to 305 hours in February, as winter transitions into spring. The peak sunshine month is March, where the sunshine reaches an impressive 347 hours, followed closely by April and May with 339 hours and 357 hours, respectively. This progressive increase during the late spring months indicates ideal conditions for outdoor activities and tourism, showcasing Dominica’s vibrant natural beauty under sunny skies.
As summer approaches, sunshine hours remain plentiful, peaking again in July with 354 hours. The months of August and September maintain substantial sunlight, despite the onset of the wetter season, with 347 hours and 318 hours respectively. Throughout the fall, sunshine remains relatively consistent, with 311 hours in November and 320 hours in October. Interestingly, while daylight persists, it does coincide with increased rainfall, particularly in August and September. The year culminates with 329 hours in December, closing out a year characterized by abundant sunshine that illuminates the lush landscapes of Saint George.
The ultraviolet (UV) index in Saint George, Dominica, exhibits significant variation throughout the year, highlighting the region's susceptibility to intense sun exposure. Starting with a UV index of 10 in January, categorized as "very high," individuals should limit unprotected sun exposure to 15 minutes. As the year progresses, particularly from February to May, the index escalates to a peak of 14 during April and May, placing these months firmly in the "extreme" exposure category, with a minimal safe sun exposure time of just 10 minutes. This increase indicates a growing risk of skin damage, emphasizing the importance of sun protection measures during these months.
Summer months maintain similar UV levels, with the index staying at 13-14 from June to August, further affirming the extreme sun intensity during this period. Notably, even as the rainy season approaches, the UV index remains high, with September through October reflecting values between 12 and 13. As the year nears its end, November and December show a slight decline in UV exposure, settling back down to 10 and 9, respectively, yet still categorized as "very high," warranting proactive sun safety practices. Consequently, residents and visitors to Saint George must remain vigilant in sun protection throughout the year, particularly during the peak months.
UV Risk Categories
In Saint George, Dominica, daylight duration reveals a consistent pattern throughout the year, characterized by approximately 11 to 13 hours of daylight. The year begins with 11 hours of daylight in both January and February, providing a balanced transition into the spring months. As the seasons shift, March through May experience a slight increase to 12 hours of daylight, offering longer evenings that enhance outdoor activities and exploration of the region's natural beauty.
With the onset of June, daylight reaches its peak at 13 hours, marking the longest days of the year. This extended daylight continues through July before gradually returning to the 12-hour mark from August to September. As autumn approaches, daylight decreases once more, falling back to 11 hours in October and remaining consistent through to December. This stable pattern of daylight duration underscores the tropical environment of Saint George, creating an inviting atmosphere year-round for residents and visitors alike.
Castle Comfort, Dominica enjoys a tropical climate characterized by mild temperatures throughout the year, with averages ranging from 24°C (75°F) in February to 27°C (81°F) in September. The wettest months are typically from June to October, with precipitation peaking at 167 mm (6.6 in) in October, while January to April sees lower rainfall between 51 mm and 58 mm (2.0 to 2.3 in). Sunshine is abundant, with May offering the highest at 356 hours. This combination of warmth, moisture, and sunshine creates an inviting backdrop for visitors and residents alike. For more details, visit the Castle Comfort climate.
Roseau, Dominica, enjoys a tropical climate with warm temperatures year-round. Average monthly temperatures range from 25°C (77°F) in cooler months to 27°C (81°F) during the warmest months, with maxima peaking at 29°C (84°F) in August and September. Rainfall is highest from July to October, reaching up to 117 mm (4.6 in) in October, while the driest months are January to April with about 32-36 mm (1.3-1.4 in). The region also boasts significant sunshine, particularly in March and May, averaging over 350 hours monthly. For more detailed information, check the Roseau climate.
In conclusion, Saint George, Dominica, showcases a remarkable climate characterized by warm temperatures, significant solar radiation, and a tropical rainforest environment that supports a rich biodiversity. The consistent sunshine duration and high UV index necessitate effective sun protection measures, especially during peak months. Meanwhile, the stable rainfall patterns and daylight duration enhance the region's appeal for outdoor activities and ecological exploration. Overall, the interplay of these climatic factors fosters a vibrant and inviting atmosphere, making Saint George an attractive destination for both residents and visitors seeking to bask in the beauty and warmth of this Caribbean gem.