March Weather in Carmarthen, United Kingdom

Last updated: March 17, 2025

In Carmarthen, United Kingdom, March brings a mix of mild and chillier days, with temperatures ranging from a maximum of 16°C (61°F) to a cool minimum of -5°C (24°F), giving an average of around 7°C (45°F). This transition into spring often sees significant precipitation, with 115 mm (4.5 in) expected across 18 days, contributing to the region's lush landscapes. The high humidity level of 86% adds to the fresh atmosphere, making March a unique and dynamic time to experience the beauty of Carmarthen.

March Temperature in Carmarthen

In Carmarthen, United Kingdom, March marks a notable transition as winter fades and spring begins to unveil its charm. With minimum temperatures dipping slightly to -5°C (24°F), the month still retains a chill in the air; however, daytime averages rise to a comfortable 7°C (45°F), encouraging a fresh vibrancy in the landscape. The maximum temperatures reach up to 16°C (61°F), hinting at the warmth to come as the days lengthen. This soft shift from the colder winter months creates an invigorating atmosphere, inviting residents and visitors alike to embrace the early signs of blooming flowers and budding trees. Overall, March in Carmarthen is a delightful blend of lingering winter and emerging spring, offering a perfect balance that sets the tone for the warmer months ahead.

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

The chart illustrates March temperature patterns in Carmarthen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434445485359626158544846
Data source: Temperature data for Carmarthen 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 Carmarthen

March in Carmarthen brings a notable 115 mm (4.5 in) of precipitation across 18 days, marking a transition from the wetter months of winter to a slightly milder spring. While this amount is less than the heavy rains of February and November, it still exceeds typical precipitation levels for many regions, highlighting Carmarthen's propensity for damp weather. This month often feels reflective of the lingering winter, with frequent rains punctuating the early signs of spring. As we move into April, the precipitation begins to taper off significantly, suggesting that March serves as a bridge between the intense wetness of winter and the drier days awaiting in the coming months.

March Precipitation Trends in Carmarthen

The chart displays monthly precipitation patterns in Carmarthen, 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.
JanFebMarAprMayJunJulAugSepOctNovDec99136115619010091134115171151184
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

March Humidity in Carmarthen

In March, Carmarthen, United Kingdom, experiences a slight dip in humidity at 86%, providing a subtle transition from the consistently high levels of 88% seen in both January and February. This gradual decline continues into April, where humidity further decreases to 84%, hinting at the arrival of spring and the associated changes in weather patterns. As the month progresses, the atmosphere begins to open up, setting the stage for the warmer and drier conditions of summer, which will see humidity levels drop significantly by May and June. Overall, March acts as a bridge from winter's moisture-laden air to the more temperate climate that awaits in the upcoming months.

March Average Humidity in Carmarthen

This chart illustrates the average monthly humidity levels in Carmarthen, with March's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how March's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%86%84%80%80%70%73%79%89%90%89%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Carmarthen

As March arrives in Carmarthen, the UV Index sees a notable increase, rising to 4 and indicating a moderate exposure category. This shift means that residents and visitors should be mindful of sun protection, especially as the burn time shortens to 30 minutes. In contrast to the muted indices of January and February, where UV levels were low, March heralds the onset of spring and an awakening sun, signaling a gradual move towards higher UV levels in the months ahead. As April brings a further rise to 6, the need for skin care will become even more significant. Stay informed and protect your skin during these transitional months by checking the seasonal trends at Carmarthen UV Index.

Maximum UV Index Levels in Carmarthen for March

The chart shows the monthly maximum UV Index (UVI) for Carmarthen 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.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Carmarthen 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 Carmarthen

As spring unfolds in Carmarthen, March emerges as a beacon of light with an impressive 229 hours of sunshine, marking a significant increase from the 157 hours seen in February. This surge not only paints a vibrant picture of longer, sunnier days but also sets the tone for the season ahead. With each passing month leading up to summer, the trend of increasing sunlight continues; April boasts 341 hours, followed by an even more dazzling 409 hours in May. This gradual rise not only enhances the beauty of the ever-blooming landscape but also invigorates the spirit of the community, encouraging outdoor activities and social gatherings. As winter fades, the delightful March sunshine in Carmarthen heralds the approach of warmer, brighter days to come.

Monthly Sunshine Duration in Carmarthen: March Highlighted

The March sunshine duration represents the total number of hours Carmarthen 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.
JanFebMarAprMayJunJulAugSepOctNovDec97h157h229h341h409h401h422h379h313h245h138h114h
Data source: Carmarthen March Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Carmarthen During March

In March, Carmarthen experiences a notable increase in sunny weather, with a 29% chance of sunshine, marking a slight rise from February's 24%. This trend suggests that as winter starts to fade, residents can look forward to brighter days ahead. Although the chance of sun still lags behind the more promising 53% seen in April, it offers a refreshing glimpse into the upcoming spring, hinting that March may just be the threshold from the gloom of the winter months. With the subsequent months showing fluctuating sunshine probabilities, March serves as an encouraging pivot towards a more sun-kissed season.

Percentage of Sunny Days in March in Carmarthen

The chart illustrates the percentage of sunny days in Carmarthen 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 Carmarthen experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%24%29%54%32%26%40%34%27%20%25%22%
Data source: Carmarthen March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Carmarthen in March

As spring unfolds in Carmarthen, the daylight duration experiences a refreshing leap in March, offering 11 hours of natural illumination. This increase from 9 hours in February heralds a significant shift, as the days grow longer and sunnier, paving the way for the vibrant growth of nature. The progression continues into April and May, where daylight extends to 13 and 15 hours respectively, culminating in the longest days of summer in June and July with 16 hours of daylight. This upward trend from winter's shorter days is not just a welcome change; it energizes the community and encourages outdoor activities, painting a vivid picture of life awakening with the season's change.

Average Daylight Hours in Carmarthen for March

The chart illustrates the variation in daylight duration in Carmarthen throughout the year, with March highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 21m9h 57m11h 55m13h 55m15h 41m16h 36m16h 6m14h 31m12h 35m10h 35m8h 47m7h 50m
Data source: Carmarthen daylight hours, calculated by summing the hours between sunrise and sunset for each day.

March Winds in Carmarthen

As March settles in Carmarthen, a refreshing breeze sweeps through the region, with an average wind speed of 5.5 m/s (12 mph). This tempo maintains a lively rhythm, slightly cooler than February's gusts but still invigorating as winter retreats. Notably, March serves as a transitional phase before the milder days of spring take hold in April, when winds drop to 3.9 m/s (9 mph). The patterns indicate a gradual decrease in wind intensity as the year progresses towards summer, suggesting that while March brings a brisk vitality, the coming months will offer a gentler touch, providing a perfect backdrop for outdoor escapades.

Average March Wind Speed in Carmarthen

The chart displays monthly wind speed patterns in Carmarthen, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.46.55.5 m/s3.95.13.83.54.53.95.94.86.2
Data source: Carmarthen March wind data, generated using information from the Copernicus Climate Change Service.

How March Weather in Carmarthen Compares to Other Months

The weather in Carmarthen changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of March's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Carmarthen and find detailed weather information for every month.

When comparing the weather in March and January, we notice a slight increase in warmth during March, with average temperatures rising to 7°C (45°F) compared to January's 6°C (43°F). However, January experiences marginally higher minimum temperatures, averaging -2°C (28°F) versus March's -5°C (24°F). Precipitation is more frequent in March, occurring on 18 days and totaling 115 mm (4.5 in), while January sees less rainfall at 99 mm (3.9 in) over 13 days. Humidity remains relatively high in both months, with January at 88% and March slightly lower at 86%. For more detailed information, see Carmarthen weather in January.

When comparing the weather in March to that of February, it’s clear that while both months share similar average temperatures, March experiences a slightly wider temperature range, with a minimum of -5°C (24°F) and a maximum of 16°C (61°F). February, on the other hand, has a minimum of -2°C (28°F) and a maximum of 14°C (58°F). In terms of precipitation, March has a total of 115 mm (4.5 in) falling over 18 days, while February had slightly more, with 136 mm (5.3 in) over 17 days. Humidity levels remain relatively high in both months, with March at 86% and February at 88%. For a detailed look at February's weather, visit Carmarthen weather in February.

March tends to be cooler and wetter compared to April, with temperatures ranging from a chilly -5°C (24°F) to a mild 16°C (61°F) and significant precipitation of 115 mm (4.5 in) over 18 days. In contrast, April brings slightly warmer weather with temperatures ranging from 0°C (32°F) to 19°C (67°F) and reduced rainfall of 61 mm (2.4 in) over just 11 days. Additionally, humidity levels drop slightly in April, from 86% in March to 84%. For a more detailed look at the weather conditions in this month, check out Carmarthen weather in April.

March and May offer distinct contrasts in weather. In March, temperatures range from a chilly minimum of -5°C (24°F) to a maximum of 16°C (61°F), with an average of 7°C (45°F). The month also sees considerable precipitation, with 115 mm (4.5 in) falling over 18 days, and humidity levels reaching a high of 86%. In contrast, May enjoys milder temperatures, with a minimum of 2°C (36°F), an average of 12°C (53°F), and a maximum of 23°C (73°F). Precipitation decreases to 90 mm (3.5 in) over 12 days, and humidity levels are slightly lower at 80%. For more details on the weather in May, check out Carmarthen weather in May.

March and June present quite a contrast in weather conditions. In March, temperatures can range from a chilly minimum of -5°C (24°F) to a milder maximum of 16°C (61°F), with an average of 7°C (45°F). This month experiences significant precipitation, totaling 115 mm (4.5 in) over 18 days, along with high humidity levels averaging 86%. In contrast, June showcases a more pleasant climate with temperatures fluctuating between a minimum of 7°C (45°F) and a maximum of 25°C (78°F), with an average of 15°C (59°F). While June has slightly less rainfall at 100 mm (3.9 in) over 16 days, the humidity is lower at 80%. For a detailed view of weather in June, you can refer to Carmarthen weather in June.

March and July present distinctly different weather patterns. In March, temperatures range from a chilly -5°C (24°F) at night to a mild 16°C (61°F) during the day, with an average of 7°C (45°F). The month is characterized by higher precipitation, totaling 115 mm (4.5 in) over 18 days, and humidity levels are notably high at 86%. In contrast, July boasts a much warmer climate, with nighttime lows of 8°C (48°F) and daytime highs reaching 26°C (79°F), averaging around 16°C (62°F). Precipitation is lower in July, at 91 mm (3.6 in) across 13 days, and the humidity is more comfortable at 70%. For more detailed weather information, check out Carmarthen weather in July.

March and August offer a stark contrast in weather conditions. In March, temperatures range from a chilly -5°C (24°F) at night to a mild 16°C (61°F) during the day, with an average of 7°C (45°F). The month sees significant precipitation, totaling 115 mm (4.5 in) over approximately 18 days, coupled with high humidity levels at 86%. In contrast, August experiences warmer temperatures, with nightly lows of 9°C (49°F) and daytime highs reaching 25°C (78°F), averaging around 16°C (61°F). Although August has slightly more rainfall at 134 mm (5.3 in) over 19 days, humidity levels are notably lower at 73%. For more details on August weather, you can check Carmarthen weather in August.

When comparing the weather in March and September, notable differences emerge in temperature and humidity. March experiences cooler temperatures, with a minimum of -5°C (24°F) and an average of 7°C (45°F), while September offers a much milder climate, featuring a minimum of 5°C (42°F) and an average of 15°C (58°F). Both months receive similar precipitation levels at 115 mm (4.5 in), but March sees rainfall over 18 days compared to September's 16 days. Additionally, humidity is higher in March at 86%, contrasting with September's more comfortable 79%. For more information on September weather, visit Carmarthen weather in September.

March and October present notable differences in weather patterns, despite both months experiencing similar levels of precipitation and humidity. In March, temperatures range from a chilly -5°C (24°F) to a mild 16°C (61°F), with an average of 7°C (45°F). Conversely, October offers slightly warmer conditions, with temperatures varying from 0°C (33°F) to a pleasant 20°C (68°F) and an average of 12°C (54°F). However, October sees increased precipitation, accumulating 171 mm (6.7 in) over 18 days, compared to March's 115 mm (4.5 in). For more details on October's weather, you can check Carmarthen weather in October.

March and November present contrasting yet somewhat similar weather patterns. In March, temperatures can dip as low as -5°C (24°F), with an average of 7°C (45°F) and a maximum of 16°C (61°F). During this month, there is an average precipitation of 115 mm (4.5 in) spread over 18 days, with humidity levels around 86%. In contrast, November sees milder temperatures, ranging from a minimum of 0°C (33°F) to a maximum of 15°C (60°F), with an average temperature of 9°C (49°F). Precipitation increases slightly to 151 mm (6.0 in), also over 18 days, and humidity rises to 90%. For more specific insights, you can explore Carmarthen weather in November. Overall, while both months are characterized by significant precipitation and high humidity, November tends to be milder and wetter compared to the chillier and slightly less damp March.

In comparing the weather of March and December, one can observe notable differences in temperature and precipitation. March experiences a minimum temperature of -5°C (24°F) and an average of 7°C (45°F), peaking at 16°C (61°F). It also sees around 115 mm (4.5 in) of precipitation across 18 days, with a humidity level of 86%. In contrast, December's temperatures are generally milder, with a minimum of 0°C (32°F), an average of 8°C (46°F), and a maximum of 13°C (55°F). This month receives more rainfall, totaling 184 mm (7.2 in) over 20 days, and has slightly higher humidity at 89%. For a detailed look at December weather, you can check Carmarthen weather in December. Overall, December is wetter and more consistently cool, while March tends to be more variable with a wider temperature range.

Compare Carmarthen's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in Carmarthen

March in Carmarthen marks a transition from winter's chill to the hopeful hints of spring. With temperatures gradually climbing, the month boasts an average of 7°C, contrasting sharply with the minimum lows sometimes dipping to a brisk -5°C. Expect rain during this time as well, with about 18 days of precipitation contributing to the 115 mm collected, ensuring the landscape remains lush and green. The elevated humidity at 86% can make it feel cooler, a reminder that although spring is approaching, winter's grasp is still felt. For a deeper exploration of what to expect throughout the year, visit Carmarthen Climate.