Last updated: August 31, 2025
Experience the vibrant January weather of Castries, Saint Lucia, where temperatures consistently hover around a comfortable 26°C (78°F). The month sees a daily maximum of 30°C (86°F), perfect for sun-seekers, while evenings cool down to a cozy minimum of 22°C (72°F). However, be prepared for a touch of humidity, averaging a robust 81%, which adds a tropical feel to the air. With 36 mm (1.4 in) of precipitation spread over 15 days, brief rain showers are common but often enhance the lush beauty of this picturesque island. Whether you're exploring vibrant markets or relaxing on pristine beaches, January in Castries delivers a delightful blend of warmth and tropical charm.
In January, Castries, Saint Lucia greets visitors with mild and inviting temperatures that perfectly encapsulate island life. With a minimum of 22°C (72°F) and an average of 26°C (78°F), the weather is both comfortable and conducive to relaxation. As the month progresses, highs can reach up to 30°C (86°F), setting the stage for sun-soaked adventures. Notably, January temperatures mirror those of February, continuing the trend of warm, stable weather that transitions seamlessly into the coming months. This delightful climate invites both exploration of the island’s natural beauty and indulgent downtime, making it a sought-after destination for those escaping winter chill elsewhere.
In January, Castries, Saint Lucia experiences a relatively light start to the year with precipitation totaling 36 mm (1.4 in) over 15 days of rainfall. This marks the beginning of a gradual rise in rainfall as the months progress. Interestingly, the trend shows a slight decrease to 33 mm (1.3 in) in February but picks up again in March and holds steady through April, maintaining a consistent pattern. As summer approaches, rainfall escalates dramatically, peaking in the later months with July and August witnessing significant downpours—over 100 mm each month—leading to a lush, vibrant landscape. Thus, while January might be one of the drier months, it sets the stage for the island's wet season, reflecting a dynamic transition from mild beginnings to the lush, tropical rainfall of the summer months.
In January, Castries, Saint Lucia experiences humidity levels that hover around a comfortable 81%. This marks the beginning of a gradual trend observed throughout the year, where humidity fluctuates slightly but remains consistently high. February and March echo this with a steady 80%, while April brings a slight dip to 79%. However, as the year progresses into the warmer months, humidity begins to rise again, peaking at 84% in July. The late summer and early fall months maintain this moist atmosphere, averaging 80% to 83%, before tapering off slightly as winter approaches. This pattern showcases Castries' tropical climate, characterized by a persistent warmth and humidity that envelops the island throughout the year.
In January, Castries, Saint Lucia experiences a very high UV Index of 10, indicating that sun protection is essential during this month. With a burn time of just 15 minutes, it’s a reminder to stay vigilant against the sun’s rays. The UV Index fluctuates significantly as the year progresses, peaking in the extreme category during the months of February through August, where indices soar to 12 and 14 and burn times drop to a brief 10 minutes. As autumn approaches, the UV levels begin to decrease again, returning to a very high category in November at an Index of 10 and tapering to 9 in December. This seasonal trend emphasizes the importance of sun safety year-round, particularly in the vibrant tropical climate of Castries. For more details on the UV Index throughout the year, visit Castries UV Index.
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January in Castries, Saint Lucia welcomes you with 268 hours of sunshine, creating a warm and inviting atmosphere to start the year. As the months progress, the sun shines ever brighter, peaking in May with an impressive 355 hours. This upward trend reflects the island's radiant charm, perfect for beach lovers and sun seekers alike. In the following months, the sunshine hours remain generous, with April and July maintaining close to 336 and 348 hours, respectively. Even as the calendar turns to the latter half of the year, the sun stays vibrant, with hours only slightly declining to 319 in September and 320 in October. This consistent abundance of sunshine throughout the year makes Saint Lucia a paradise for those craving warmth and brightness.
In Castries, Saint Lucia, January boasts a 52% chance of sunny weather, setting a promising tone for the year ahead. This figure is particularly notable as it leads into February, which sees a substantial 66% likelihood of sunshine, indicating a favorable transition into the dry season. Following the highs of early winter, however, the probability of sunny days declines in March to 42% and continues a downward trend through April and June, with 36% and 29% chances respectively. The sun makes a return in July and August, each at 46%, before climbing back up to 51% in September, suggesting a seasonal fluctuation of weather patterns typical for the region. As the year wraps up, both November and December offer a brighter outlook with chances of sunny days at 58% and 54%, making the tail end of the year increasingly delightful. This trend signifies that while January starts off relatively sunny, visitors can expect clearer skies in the months to come.
In Castries, Saint Lucia, January greets visitors with 11 hours of daylight, a duration that remains consistent through February. As the months progress into March, daylight begins to stretch, reaching 12 hours and sustaining this generous illumination from March through August. This period offers ample time for sun-soaked adventures and exploration. As autumn approaches in September, daylight once again dips back to 12 hours, but by October it returns to 11 hours. The trend continues into the final months of the year, with daylight tapering off slightly in November and December, returning to the 11-hour mark. This consistent daylight duration throughout the year highlights a stable tropical climate, ideal for both relaxation and outdoor activities.
In January, Castries enjoys a refreshing average wind speed of 6.3 m/s (14 mph), creating a delightful atmosphere for residents and visitors alike. As the month progresses into February, the breeze strengthens slightly to 7.3 m/s (16 mph), providing an invigorating backdrop for outdoor activities. This current of excitement holds steady through March, returning to 6.3 m/s, before gently easing into April with a calmer 5.4 m/s (12 mph). Interestingly, the winds tend to remain consistent around the 6.3 m/s mark in May and July, suggesting a stable weather pattern as summer approaches. However, come August, the winds drop to a milder 5.1 m/s (11 mph), heralding the quieter months leading into the fall. By September, the winds further subside to 3.9 m/s (9 mph), but they gradually pick up again by October, reaching 5.6 m/s (13 mph). A slight decline is seen in November (4.9 m/s), before ending the year on a high note with a return to 6.4 m/s (14 mph) in December. This cyclical ebb and flow of winds throughout the year not only shapes the local climate but also enhances Castries' charm, making it a year-round destination for those seeking warmth and gentle breezes.
Weather in Castries varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Castries, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather features slightly warmer conditions, with an average temperature of 26°C (78°F) and maximum highs reaching 30°C (86°F), along with 36 mm (1.4 in) of rainfall over 15 days and humidity levels at 81%. In contrast, February exhibits a similar overall temperature range, with an average of 25°C (78°F) and minimal fluctuations in maximum temperatures. February experiences slightly less precipitation, totaling 33 mm (1.3 in) over 12 days, and a humidity level of 80%. For more details, you can check Castries weather in February.
In comparing the weather between January and March, we see that both months have similar temperature ranges, with January experiencing minimum temperatures of 22°C (72°F) and maximums reaching 30°C (86°F), while March mirrors this pattern with a minimum of 22°C (72°F) and a slightly lower maximum of 30°C (85°F). The average temperatures are also comparable, sitting at around 26°C (78°F) in January and 26°C (79°F) in March. Precipitation is slightly higher in March at 38 mm (1.5 in) compared to January's 36 mm (1.4 in), with both months recording precipitation on about 15 days. Humidity levels remain stable, with January at 81% and March just a touch lower at 80%. For more details on the specifics of March weather, visit Castries weather in March.
In January, the weather showcases stable, warm conditions with daytime temperatures averaging around 26°C (78°F) and a maximum of 30°C (86°F). The month experiences around 36 mm (1.4 in) of precipitation spread across 15 days, alongside a humidity level of 81%. By contrast, April sees a slight increase in nighttime temperatures, with a minimum of 23°C (73°F) and a maximum reaching 31°C (87°F), while maintaining the same average temperature of 26°C (80°F). Precipitation in April slightly decreases to 35 mm (1.4 in) over 14 days, with humidity just a notch lower at 79%. For more specific details on the weather in April, you can visit Castries weather in April.
In comparing the weather between January and May, January shows slightly cooler temperatures with a minimum of 22°C (72°F) and an average of 26°C (78°F), while May boasts a minimum temperature of 23°C (74°F) and an average of 27°C (81°F). Both months experience relatively high humidity, with January at 81% and May just slightly lower at 80%. Precipitation is fairly similar, with January receiving 36 mm (1.4 in) over 15 days compared to May's 39 mm (1.6 in) over 13 days. Overall, May tends to be a bit warmer and drier than January. For more detailed insights, check out Castries weather in May.
In January, the weather features a warm climate with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), while enjoying an average of 26°C (78°F). This month experiences 36 mm (1.4 in) of precipitation over 15 days, accompanied by a relatively high humidity level of 81%. In contrast, June offers slightly warmer temperatures, with a minimum of 24°C (75°F) and a maximum of 31°C (88°F), resulting in an average temperature of 27°C (81°F). However, June sees increased rainfall, totaling 65 mm (2.6 in) over 16 days, and a marginal rise in humidity at 83%. For a detailed overview of the conditions, check out Castries weather in June.
In January, the weather in Castries is warm with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F), and an average temperature of 26°C (78°F). The month experiences relatively low precipitation, with 36 mm (1.4 in) occurring over 15 days, and humidity levels at 81%. In contrast, July sees slightly higher temperatures, with a minimum of 24°C (76°F) and a maximum of 31°C (89°F), averaging 27°C (81°F). However, July is also marked by increased rainfall, totaling 105 mm (4.1 in) over 24 days and a slight rise in humidity to 84%. For more detailed information, you can check Castries weather in July.
In January, the weather is generally warm, with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F) and an average of 26°C (78°F). This month experiences moderate precipitation of 36 mm (1.4 in) over 15 days, coupled with high humidity at 81%. In contrast, August brings slightly warmer temperatures, with a minimum of 24°C (76°F), an average of 28°C (82°F), and a maximum of 31°C (89°F). However, August is significantly wetter, with precipitation reaching 113 mm (4.5 in) spread across 25 days, while maintaining the same humidity level of 81%. For more detailed insights into August weather, you can check Castries weather in August.
In January, the weather tends to be pleasantly warm with minimum temperatures around 22°C (72°F) and an average of 26°C (78°F), reaching a maximum of 30°C (86°F). The humidity is relatively high at 81%, and the month experiences about 36 mm (1.4 in) of precipitation over 15 days. In contrast, September sees warmer temperatures with a minimum of 25°C (76°F) and an average of 28°C (83°F), peaking at 32°C (90°F). However, it also brings significantly more rainfall, totaling 121 mm (4.8 in) over 19 days, and maintains a humidity level of 80%. For more detailed information, you can check Castries weather in September.
In January, the weather is typically warm with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (86°F) and an average of 26°C (78°F). The month sees about 36 mm (1.4 in) of precipitation over 15 days and boasts a humidity level of 81%. In contrast, October presents slightly warmer conditions with a minimum temperature of 24°C (76°F) and a maximum of 32°C (89°F), resulting in an average of 27°C (81°F). However, October also brings increased rainfall, with 128 mm (5.1 in) of precipitation spanning over 21 days and a humidity level of 82%. For more details about October weather, you can explore Castries weather in October.
In January, the weather is characterized by a minimum temperature of 22°C (72°F) and an average of 26°C (78°F), with maximums reaching 30°C (86°F). This month experiences moderate precipitation of 36 mm (1.4 in) over 15 days, coupled with a humidity level of 81%. In contrast, November sees slightly warmer temperatures, with a minimum of 24°C (75°F), an average of 27°C (81°F), and a maximum of 31°C (87°F). However, November is also much wetter, recording 103 mm (4.1 in) of precipitation over 21 days, and humidity levels increase slightly to 83%. For more detailed insights, you can check Castries weather in November.
In comparing the weather during January and December, we find that both months exhibit remarkably similar average temperatures, with January showing a minimum of 22°C (72°F), an average of 26°C (78°F), and a maximum of 30°C (86°F). December's parameters are nearly identical, featuring a minimum of 22°C (72°F), an average of 26°C (80°F), and a maximum of 30°C (86°F) as well. However, December experiences slightly more precipitation, totaling 46 mm (1.8 in) over 16 days, compared to January's 36 mm (1.4 in) over 15 days. Additionally, humidity levels are fairly consistent, with January at 81% and December slightly higher at 82%. For more details about the weather in December, you can visit Castries weather in December.
In January, Castries experiences a delightful blend of warmth and humidity, creating a comfortable retreat compared to the hotter months ahead. The average temperature hovers around a pleasant 26°C (78°F), with highs reaching 30°C (86°F), making it an ideal time for outdoor activities. While you may encounter rain on 15 days, the total precipitation remains relatively low at 36 mm (1.4 in), ensuring that the sun still graces the city for plenty of the month. With humidity levels peaking at 81%, visitors can enjoy vibrant greenery brought to life by the occasional showers, setting a beautiful backdrop against the tropical landscape. For those looking to understand Castries' unique climate better, check out Castries Climate for more insights.