Last updated: August 21, 2025
January in Roseau, Dominica offers a delightful tropical climate, with average temperatures hovering around 25°C (78°F), peaking at a comfortable 27°C (80°F) during the day and dipping to a mild 23°C (73°F) at night. Despite the pleasant warmth, this month experiences some rainfall, averaging 36 mm (1.4 in) over 13 days, contributing to the lush greenery of the island. With a humidity level of 78%, visitors can expect a humid yet serene atmosphere, making January a beautiful time to explore the vibrant landscapes and rich culture of Dominica.
In January, Roseau, Dominica, welcomes visitors with a delightful tropical climate characterized by minimum temperatures around 23°C (73°F) and a pleasant average of 25°C (78°F), peaking at a comfortable 27°C (80°F). This month marks the start of a gradual warming trend that continues through the year, with February showing a slight dip to 22°C (72°F) for nighttime lows but remaining consistent overall. March and April maintain similar averages, while May introduces warmer days, reaching 28°C (82°F). The warmth persists into the summer months, with temperatures peaking at 29°C (84°F) in August and September. Overall, January’s mild and inviting climate sets the tone for the island's steadily rising temperatures, promising warmth and sunshine for those looking to escape colder winters.
In January, Roseau, Dominica experiences a moderate precipitation of 36 mm (1.4 in), spread over approximately 13 days of rain. This consistent dampness transitions smoothly into February, where the rainfall remains steady at the same amount and number of rainy days. As the months progress towards spring, precipitation slightly decreases, hitting a low of 32 mm (1.3 in) in April before climbing back up again. Notably, June marks a significant uptick, with rains escalating to 68 mm (2.7 in) as summer begins, enrolling the island in its wetter season. The trend peaks in September, reaching 114 mm (4.5 in), showcasing the lush, vibrant environment that characterizes the region during this time. Overall, the data illustrates a distinct seasonal pattern, with early months presenting milder rainfall and a gradual ramp-up to the more intense rainy days of mid-year.
In January, Roseau, Dominica, greets the year with a moderate humidity level of 78%, setting a trend that remains consistent throughout the early months. This level of humidity mirrors that of both March and April, suggesting a stable climate as the island transitions from winter to spring. As the months progress, a gradual increase is observed, with humidity peaking at 84% in July, the heart of the rainy season. Following this peak, humidity slightly declines, settling back to 80% by October and maintaining this level through November and December. Overall, while January starts the year with a comfortable balance, the summer months bring about a noticeable elevation in humidity, encapsulating the lush, tropical essence of Dominica.
In January, Roseau, Dominica, experiences a UV Index of 10, placing it in the very high exposure category, with a burn time of just 15 minutes. This marks the beginning of a significant upward trend, as the index escalates steadily through the following months, reaching extreme levels by February and peaking at 14 in both April and May. Notably, this extreme exposure continues throughout the summer, with consistent 13-14 index values from June to July, before gradually tapering down to 12 in October. As the year comes to a close, the UV levels drop slightly, finishing with 10 in November and 9 in December. As a result, awareness of sun safety is essential, especially during the peak months. For more details on planning your time outdoors, check out the full Roseau UV Index guide.
UV Risk Categories
In January, Roseau, Dominica enjoys a delightful 267 hours of sunshine, setting the stage for a vibrant year ahead. As the months progress, the sunshine hours steadily increase, peaking in May with an impressive 357 hours. This trend reflects the island's sunny disposition, allowing residents and visitors alike to bask in the warmth as spring unfolds. The early summer months continue to deliver abundant sunlight, with July and August showcasing 354 and 347 hours, respectively, ensuring plenty of opportunities for outdoor adventures. As the year transitions into the cooler months, sunshine remains generous, ranging from 319 to 329 hours from September to December, providing a comforting glow even as temperatures drop. Each month in Roseau paints a picture of warmth and brightness, inviting all to embrace the island's tropical allure.
In January, Roseau, Dominica enjoys a moderate chance of sunshine, with approximately 56% of the month likely to be bathed in sunlight. As the new year progresses, February exhibits a notable increase in sunny days, boasting a 73% chance. However, the trend shifts as spring approaches; March sees a decrease to 51%, and by April, the likelihood drops further to 43%. This sunny pattern resumes in May with 52%, before taking a dip in the summer months, where June presents the lowest chance at 31%. The sun returns in July at 54%, maintaining a fairly even trend through the following months, culminating in a solid 66% chance of sunshine in November and 67% in December. Overall, while January offers a refreshing start with decent sun chances, the following months vary significantly, with February shining the brightest.
In Roseau, Dominica, January ushers in a stable 11 hours of daylight, a pattern that continues into February. As spring approaches, March marks a shift, bringing an increase to 12 hours, a trend that maintains through April and May. The summer months shine a bit brighter, with June extending daylight to 13 hours, the peak of the year. The daylight duration then gradually tapers off, returning to 12 hours from July to September before descending again to 11 hours as autumn settles in from October through December. This rhythmic pattern not only enhances the natural beauty of the island but also creates a vibrant atmosphere throughout the changing seasons.
In January, the winds in Roseau, Dominica, gently embrace the island with an average speed of 8.2 m/s (18 mph), providing a refreshing start to the year. This steady breeze is consistent with March and May, suggesting a stable climate as the dry season unfolds. As the months progress into February, wind speeds pick up to 9.7 m/s (22 mph), peaking briefly before gradually easing in April to 7.0 m/s (16 mph), only to regain some strength during the warmer summer months of June and July. Interestingly, the wind calms down considerably in September, dropping to 5.3 m/s (12 mph), signaling a typical shift as the wetter season approaches. Overall, the wind patterns exhibit a gentle yet dynamic rhythm, enhancing the tropical allure of Roseau throughout the year.
Weather in Roseau varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Roseau, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February have quite similar weather patterns, with January experiencing slightly warmer temperatures. In January, the minimum temperature is 23°C (73°F), while February's minimum is marginally lower at 22°C (72°F). Both months share an average temperature of 25°C (77°F) and a maximum temperature of 26-27°C (80°F), contributing to a warm tropical climate. Precipitation levels remain consistent at 36 mm (1.4 in) over 13 days for both months, with January having a slight edge in humidity at 78% compared to February's 77%. For more details on February weather in Roseau, you can check out Roseau weather in February.
In January, the weather features a consistent warm climate with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 27°C (80°F), alongside an average temperature of 25°C (78°F). The month experiences approximately 36 mm (1.4 in) of precipitation over 13 days and maintains a humidity level of 78%. In contrast, March exhibits slightly cooler temperatures, with a maximum of 26°C (80°F) and an average of 25°C (77°F), while still holding a minimum temperature of 23°C (73°F). The precipitation in March is slightly lower at 34 mm (1.3 in), spread over 14 days, with humidity remaining steady at 78%. For more detailed insights, you can visit Roseau weather in March.
In January, the weather features a minimum temperature of 23°C (73°F) and typically hovers around an average of 25°C (78°F), reaching a maximum of 27°C (80°F). The month experiences about 36 mm (1.4 in) of precipitation over approximately 13 days, while humidity remains consistent at 78%.
In contrast, April exhibits similar temperature patterns with a minimum of 23°C (74°F), an average of 25°C (78°F), and a slightly warmer maximum at 27°C (81°F). Precipitation in April drops slightly to 32 mm (1.3 in) over about 12 days, maintaining the same humidity level of 78%.
For a closer look at the specific weather in April, you can visit Roseau weather in April.
In January, the weather features average temperatures around 25°C (78°F), with minimums of 23°C (73°F) and maximums reaching 27°C (80°F). The month experiences 36 mm (1.4 in) of precipitation over 13 days, coupled with a humidity level of 78%. By contrast, May sees slightly warmer temperatures, with a minimum of 24°C (75°F), an average of 26°C (79°F), and a maximum of 28°C (82°F). Precipitation remains similar at 35 mm (1.4 in), but it falls over just 10 days, and humidity rises slightly to 80%. For a detailed look at May's weather trends, visit Roseau weather in May.
In January, the weather features relatively comfortable temperatures, with a minimum of 23°C (73°F) and an average of 25°C (78°F), peaking at 27°C (80°F). Precipitation is moderate, with 36 mm (1.4 in) over 13 days, and humidity levels hover around 78%. By contrast, June experiences slightly warmer conditions, with a minimum of 24°C (75°F), an average of 27°C (80°F), and a maximum of 28°C (82°F). However, rainfall increases in June, accumulating 68 mm (2.7 in) over 14 days, and humidity rises to 82%. For more detailed information, check out Roseau weather in June.
In January, the weather tends to be slightly cooler, with average temperatures ranging from a minimum of 23°C (73°F) to a maximum of 27°C (80°F) and 36 mm (1.4 in) of precipitation spread over about 13 days. The humidity level is relatively high at 78%, but overall, conditions remain comfortable. In contrast, July experiences warmer temperatures as the minimum rises to 25°C (77°F) and the maximum reaches 28°C (83°F), with an average of around 27°C (80°F). However, rainfall increases significantly to 97 mm (3.8 in) over about 20 days, resulting in a higher humidity of 84%. This creates a more tropical and humid environment, making July distinctly different from January. For more detailed insights, check the weather specifics here: Roseau weather in July.
In January, the weather in Roseau features mild temperatures with a minimum of 23°C (73°F) and average highs reaching 27°C (80°F). It experiences relatively low precipitation, totaling 36 mm (1.4 in) over 13 days, with humidity levels around 78%. In contrast, August sees slightly warmer temperatures, with lows of 25°C (77°F) and average highs peaking at 29°C (84°F). However, it also brings significantly more rainfall, with 109 mm (4.3 in) over 21 days and a rise in humidity to 82%. For more detailed insights, you can explore Roseau weather in August.
In January, the weather typically features a milder temperature range, with minimums around 23°C (73°F) and maximums reaching 27°C (80°F). The month sees an average temperature of 25°C (78°F) and experiences about 36 mm (1.4 in) of precipitation over 13 rainy days, with humidity levels at 78%. In contrast, September presents warmer conditions, with minimum temperatures at 25°C (78°F) and highs peaking at 29°C (84°F), averaging 27°C (81°F). This month is notably wetter, receiving 114 mm (4.5 in) of rainfall across 17 days and a slight increase in humidity to 80%. For more detailed insights, you can check Roseau weather in September.
January and October exhibit distinct weather characteristics. In January, temperatures range from a minimum of 23°C (73°F) to a maximum of 27°C (80°F), with an average of 25°C (78°F). The month experiences 36 mm (1.4 in) of precipitation over approximately 13 days, accompanied by a humidity level of 78%. In contrast, October sees slightly warmer temperatures, with a minimum of 25°C (77°F) and a maximum reaching 29°C (84°F), an average temperature of 27°C (81°F). However, October also brings significantly more rainfall, totaling 117 mm (4.6 in) over 20 days, and humidity rises to 80%. For a closer look at October weather specifics, you can visit Roseau weather in October.
In January, the weather is pleasantly warm with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 27°C (80°F), and an average temperature of 25°C (78°F). The month experiences relatively low precipitation with about 36 mm (1.4 in) spread over 13 days, accompanied by a humidity level of 78%. In contrast, November tends to be slightly warmer, with temperatures ranging from a minimum of 25°C (76°F) to a maximum of 28°C (82°F) and an average of 26°C (80°F). However, November sees a significant increase in rainfall, with approximately 97 mm (3.8 in) over 20 days and a humidity level of 80%. For more detailed insights, you can visit Roseau weather in November.
In January, the weather is slightly cooler with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 27°C (80°F) and an average of 25°C (78°F). The month sees about 36 mm (1.4 in) of precipitation over 13 days, with humidity at 78%. In contrast, December is slightly warmer, featuring temperatures that range from 24°C (75°F) to 28°C (82°F) with an average of 26°C (79°F). Precipitation is higher in December, totaling 53 mm (2.1 in) over 18 days, and humidity is marginally higher at 79%. For more detailed insights into December weather, refer to Roseau weather in December.
As January unfolds in Roseau, the weather showcases a delightful warmth that invites outdoor adventures, setting it apart from the cooler months that precede it. With comfortable temperatures averaging around 25°C (78°F), this month balances pleasant conditions with a touch of humidity, making the air feel refreshing yet softly embracing. Though January experiences a moderate amount of rainfall, it is still less than some of the wetter months ahead, allowing for ample opportunities to explore the lush surroundings without frequent interruptions. For a deeper dive into the climate trends throughout the year, be sure to check out Roseau Climate.