March Weather in Castries, Saint Lucia

Last updated: August 31, 2025

March in Castries, Saint Lucia brings a delightful blend of warm temperatures and refreshing breezes. With maximum highs reaching 30°C (85°F) and an average of 26°C (79°F), visitors can expect pleasant weather ideal for exploring the vibrant landscape. While the minimum temperature hovers around 22°C (72°F), occasional rain is a feature of the month, with 38 mm (1.5 in) of precipitation spread over 15 days. Humidity levels sit at a comfortable 80%, creating a lush, tropical ambiance. March is perfect for experiencing the beauty of Saint Lucia while enjoying a tropical climate that invites both relaxation and adventure.

March Temperature in Castries

March in Castries, Saint Lucia, offers a delightful preview of the tropical warmth to come, with temperatures gently transitioning from the cooler months of winter. With a minimum temperature steady at 22°C (72°F) and an average of 26°C (79°F), this enchanting month maintains the charm of the Caribbean climate. While the maximum temperature peaks at a comfortable 30°C (85°F), it indicates a gradual rise that continues into April and May. As spring unfolds, the consistent warmth signals a vibrant outdoor lifestyle, inviting visitors to bask in the sun-drenched beaches and lush landscapes that define this idyllic island paradise. The trend shows a seamless flow from the mildness of early months into the hotter days ahead, making March an ideal time for travel and exploration.

March Weather in Castries: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Castries, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castries, March typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec787878798181818282818079
Data source: Temperature data for Castries generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Castries

March in Castries, Saint Lucia brings a modest increase in precipitation, with 38 mm (1.5 in) of rainfall recorded over 15 days. As the dry season begins to wane, March's rainfall marks a slight uptick from February's 33 mm (1.3 in), continuing the trend of gradual increases as the island transitions into wetter months. Following March, precipitation will escalate significantly, peaking in the summer months with July and August often experiencing heavy downpours. This steady rise in rainfall underscores the island's shift towards its lush, tropical climate, making March a transitional yet significant month in Castries' weather calendar.

March Precipitation Trends in Castries

The chart displays monthly precipitation patterns in Castries, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Castries, March typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec36333835396510511312112810346
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

March Humidity in Castries

In March, Castries, Saint Lucia experiences a consistent humidity level of 80%, maintaining the steady trend seen in both January and February. This slight stability suggests that the month transitions smoothly from the drier early part of the year, avoiding drastic fluctuations. Following March, humidity levels begin to rise, peaking in the mid-year months, with June and July showing increased moisture in the air at 83% and 84%, respectively. Overall, the gradual increase towards the summer months highlights the tropical nature of Castries, where humidity is a defining characteristic of the climate.

March Average Humidity in Castries

This chart illustrates the average monthly humidity levels in Castries, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Castries is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%80%79%80%83%84%81%80%82%83%82%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Castries

As March arrives in Castries, Saint Lucia, the UV Index soars to an impressive 14, categorized as extreme. This marks a continuation of the trend established in February, when the index reached 12, and it reflects the peak intensity typically seen at this time of year. With a burn time of only 10 minutes, it's crucial for sunseekers to take precautionary measures, such as applying sunscreen and seeking shade during midday hours. The pattern of high UV exposure is consistent from March through to May, maintaining an extremely high index, which emphasizes the region's tropical climate and the need for sun safety. For a comprehensive understanding of UV levels throughout the year, visit Castries UV Index.

Maximum UV Index Levels in Castries for March

The chart shows the monthly maximum UV Index (UVI) for Castries in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In March, the maximum UV index in Castries typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141313141412109
Data source: Castries March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

March Sunshine in Castries

In March, Castries basks in the warmth of approximately 345 hours of sunshine, marking a delightful peak in the winter months. This trend of increasing daylight is evident as March outshines both January and February, which see 268 and 304 hours respectively. Following the sunny embrace of March, April and May continue to delight with 336 and 355 hours of sunlight, inviting visitors to explore the stunning beaches and lush landscapes. The overall progression of hours leads us to warmer months, showcasing Saint Lucia's appeal as a vibrant tropical getaway celebrated for its consistent sunshine and idyllic weather throughout the year.

Monthly Sunshine Duration in Castries: March Highlighted

The March sunshine duration represents the total number of hours Castries experiences direct sunlight during the month of March, excluding cloudy or obstructed periods. This chart compares the sunshine duration of March with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec268h304h345h336h355h325h348h346h319h320h314h330h
Data source: Castries March Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Castries During March

March in Castries, Saint Lucia, boasts a 42% chance of sunny weather, reflecting a noteworthy dip from the previous month’s 66%. This decrease marks the start of a trend toward cloudier skies as the island transitions into the wetter season. While January and February enjoy higher probabilities of sunshine, the approaching summer months also show mixed prospects, with April seeing an even lower 36% chance of sunny days. As the year progresses, the likelihood of sun fluctuates, suggesting that early March might be one of the last strongholds for those eager to soak up some rays before the higher humidity takes hold. 🌞

Percentage of Sunny Days in March in Castries

The chart illustrates the percentage of sunny days in Castries throughout the year, with March highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Castries experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec52%66%42%36%45%29%46%46%51%47%58%54%
Data source: Castries March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Castries in March

As March arrives in Castries, Saint Lucia, residents and visitors alike revel in an exciting shift in daylight duration, enjoying a full 12 hours of sunshine—a delightful increase from the consistent 11 hours seen in the earlier months of January and February. This trend continues into April, May, and June, with daylight peaking at 12 hours, providing ample time for exploring the stunning beaches and vibrant local culture. As the year progresses towards the cooler months, daylight gradually begins to decrease again in October, settling back to 11 hours by November and December. This pattern highlights the tropical rhythm of Castries, where longer days in spring and summer perfectly complement the island's picturesque landscapes.

Average Daylight Hours in Castries for March

The chart illustrates the variation in daylight duration in Castries throughout the year, with March highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 23m11h 40m12h 3m12h 26m12h 45m12h 55m12h 50m12h 33m12h 10m11h 47m11h 28m11h 18m
Data source: Castries daylight hours, calculated by summing the hours between sunrise and sunset for each day.

March Winds in Castries

As March arrives in Castries, Saint Lucia, the refreshing embrace of the wind remains consistent, echoing the average wind speed of 6.3 m/s (14 mph), much like January. This steady breeze is a delightful continuation of February's slightly stronger gusts. As spring unfolds, wind speeds begin to dip in April, dropping to 5.4 m/s (12 mph), but regain momentum in May and June, returning to a familiar 6.4 m/s (14 mph). The overall trend reveals a harmonious rhythm of breezy beginnings transitioning into milder winds, creating an inviting atmosphere for both locals and visitors to enjoy the beautiful island ambiance. Whether basking in the sun or exploring the vibrant surroundings, the winds of March provide a gentle reminder of the ever-changing yet constant beauty of Castries.

Average March Wind Speed in Castries

The chart displays monthly wind speed patterns in Castries, with values for each month shown alongside March's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how March's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.37.36.3 m/s5.46.46.46.35.13.95.64.96.4
Data source: Castries March wind data, generated using information from the Copernicus Climate Change Service.

How March Weather in Castries Compares to Other Months

Weather in Castries varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Castries, focusing on differences in temperature, rainfall, humidity, and UV levels.

In comparing the weather conditions of March and January, we find that both months feature a similar temperature range, with minimums around 22°C (72°F), averages at 26°C (79°F), and maximums peaking at 30°C (85°F) in March and 30°C (86°F) in January. Precipitation levels are also close, with March receiving 38 mm (1.5 in) over 15 days, while January records slightly less at 36 mm (1.4 in) with the same number of rainy days. Humidity levels are comparable as well, with March at 80% and January slightly higher at 81%. For more detailed insights about January weather in Castries, you can visit Castries weather in January.

March tends to be slightly warmer than February, with average temperatures rising from 25°C (78°F) in February to 26°C (79°F) in March. Both months experience similar maximum temperatures, hovering around 30°C (86°F). However, March has a marginally higher precipitation level, with 38 mm (1.5 in) over 15 days compared to February's 33 mm (1.3 in) over 12 days. Despite the increase in rainfall days, humidity remains constant at 80% for both months. For more detailed information on February weather, you can check out Castries weather in February.

In March, the weather is characterized by mild temperatures, with a minimum of 22°C (72°F) and a maximum of 30°C (85°F), while April sees a slight increase, starting at 23°C (73°F) and peaking at 31°C (87°F). Both months experience a similar average temperature of 26°C (79°F), but April is marginally warmer. Precipitation levels are comparable, with March receiving 38 mm (1.5 in) over 15 days and April slightly less at 35 mm (1.4 in) across 14 days, reflecting a similar pattern of humidity at 80% in March and 79% in April. For more detailed information, you can check Castries weather in April.

In comparing the weather between March and May, we see a slight increase in temperature and a similar level of precipitation. March has a minimum temperature of 22°C (72°F), an average of 26°C (79°F), and a maximum of 30°C (85°F). In contrast, May begins slightly warmer, with a minimum of 23°C (74°F), an average of 27°C (81°F), and a peak temperature of 31°C (88°F). Both months experience similar humidity levels, at 80%, and while March receives 38 mm (1.5 in) of rain over 15 days, May sees a comparable 39 mm (1.6 in) over 13 days. For a closer look at the specifics of May weather, you can check Castries weather in May.

In March, the weather is warm with average temperatures ranging from a pleasant 22°C (72°F) at night to a peak of 30°C (85°F) during the day. While there is some rainfall, totaling 38 mm (1.5 in) over about 15 days, the humidity is relatively high at 80%.

In contrast, June experiences slightly warmer temperatures, with minimums of 24°C (75°F) and maximums reaching 31°C (88°F). Rainfall increases to 65 mm (2.6 in), occurring over 16 days, and humidity rises marginally to 83%.

For a more detailed look at the weather in June, visit Castries weather in June.

In March, the weather is pleasantly warm with average temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (85°F). While there is some rainfall, with about 38 mm (1.5 in) spread over 15 days, the humidity remains at a manageable 80%. In contrast, July sees slightly higher temperatures, with averages from 24°C (76°F) to 31°C (89°F). However, it is also wetter, receiving 105 mm (4.1 in) of rain over 24 days, coupled with increased humidity at 84%. For more details on the weather during this month, you can visit Castries weather in July.

March and August present distinct weather patterns, each with its own unique characteristics. In March, temperatures range from a minimum of 22°C (72°F) to a maximum of 30°C (85°F), with an average of 26°C (79°F). This month sees moderate precipitation at 38 mm (1.5 in) spread over 15 days, accompanied by a high humidity level of 80%. Conversely, August experiences slightly warmer temperatures, with a low of 24°C (76°F) and a high of 31°C (89°F), averaging at 28°C (82°F). However, August is also significantly wetter, with 113 mm (4.5 in) of rainfall occurring on 25 days, while the humidity remains comparable at 81%. For more specifics about August weather, visit Castries weather in August.

In March, the weather is pleasantly warm with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 30°C (85°F) and an average of 26°C (79°F). The month experiences moderate rainfall, totaling 38 mm (1.5 in) spread over 15 days, while the humidity remains consistently high at 80%.

In contrast, September is typically hotter, with temperatures reaching a minimum of 25°C (76°F) and peaking at 32°C (90°F), averaging around 28°C (83°F). This month sees significantly more rainfall, with a total of 121 mm (4.8 in) over 19 rainy days, yet the humidity stays constant at 80%. For more information on specific conditions, check out Castries weather in September.

In March, the weather exhibits warm temperatures with a minimum of 22°C (72°F), an average of 26°C (79°F), and a maximum of 30°C (85°F). The month sees relatively light rainfall, totaling 38 mm (1.5 in) over 15 days, and humidity levels hover around 80%.

In contrast, October presents slightly warmer temperatures, with a minimum of 24°C (76°F), an average of 27°C (81°F), and a maximum of 32°C (89°F). However, this month experiences significantly higher precipitation, accumulating 128 mm (5.1 in) across 21 days, and humidity levels increase slightly to 82%. For more details, you can check Castries weather in October.

In comparing the weather of March and November, both months showcase warm temperatures, but November tends to be slightly warmer, with average temperatures hovering around 27°C (81°F) compared to March's average of 26°C (79°F). The maximum temperatures in November also reach higher, peaking at 31°C (87°F), compared to March's 30°C (85°F). However, November experiences significantly more rainfall, with 103 mm (4.1 in) of precipitation over 21 days, while March sees only 38 mm (1.5 in) over 15 days. Humidity levels are relatively similar, with November at 83% and March at 80%. For more detailed information, you can visit Castries weather in November.

In comparing the weather between March and December, both months maintain a similar temperature range, with minimums around 22°C (72°F), averages at 26°C (79-80°F), and maximums reaching up to 30°C (85-86°F). However, December experiences slightly higher precipitation, totaling 46 mm (1.8 in) over 16 days, compared to March's 38 mm (1.5 in) across 15 days. Humidity levels are also a bit higher in December, sitting at 82%, in contrast to March's 80%. For more detailed insights into December weather, you can check Castries weather in December.

Compare Castries's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in Castries

As March unfolds in Castries, the weather begins to shift gently into a warmer rhythm. With average temperatures reaching a balmy 26°C (79°F) and maximums peaking at 30°C (85°F), it is noticeably warmer than the cooler months preceding it. While humidity remains high at about 80%, the intermittent rainfall—totaling around 38 mm (1.5 inches) over roughly 15 days—adds a refreshing contrast, nurturing the lush landscapes. This month sets the stage for the approaching dry season, making it a delightful time to experience the vibrant beauty of the island. For more detailed insights, explore the full analysis at Castries Climate.