March Weather in Caernarfon, United Kingdom

Last updated: March 17, 2025

March in Caernarfon, United Kingdom, reveals a dynamic weather pattern as temperatures fluctuate from a comfortable maximum of 18°C (65°F) to a chilly minimum of -5°C (23°F), with an average of 7°C (45°F). This month experiences considerable precipitation, totaling 104 mm (4.1 in) over 18 days, resulting in an impressive humidity level of 86%. Visitors and residents alike should prepare for a mix of spring warmth and lingering winter chill, ensuring they stay cozy while enjoying the beauty of Caernarfon’s evolving landscapes.

March Temperature in Caernarfon

In March, temperatures in Caernarfon start to hint at the arrival of spring, with minimums dropping to around -5°C (23°F) and an average temperature climbing to 7°C (45°F). The daytime highs can still reach up to 18°C (65°F), comparable to the pleasantly warm February days. As the month progresses, the chill of winter begins to fade, allowing for a gradual warming trend that will continue into April. This transition not only invites the first signs of blooming flowers but also encourages outdoor activities, making March a month of change and anticipation in this picturesque Welsh town.

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

The chart illustrates March temperature patterns in Caernarfon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434445485358616057524745
Data source: Temperature data for Caernarfon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Caernarfon

March in Caernarfon sees a notable increase in precipitation, with 104 mm (4.1 inches) of rain recorded, making it one of the wettest months of the year. Accompanied by 18 days of rainfall, this month continues the trend of a damp winter and early spring. Following the exceptionally wet February, March's precipitation maintains the high levels observed earlier in the season, contributing to the region's lush landscapes. As the weather transitions, the rainfall tends to decrease in April, suggesting that March stands as a pivotal month for water accumulation before the drier months approach. The persistence of rain showcases Caernarfon's maritime climate, where moisture is a constant companion, setting the stage for vibrant spring growth.

March Precipitation Trends in Caernarfon

The chart displays monthly precipitation patterns in Caernarfon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec771031045571918210598128111129
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Caernarfon

As winter gives way to spring in Caernarfon, the transition is reflected in the March humidity, which dips to 86%. This slight decline from February's 88% marks a gradual move towards drier conditions, setting the stage for the upcoming months. April continues this trend with a further decrease to 84%, suggesting a shift where warmer weather begins to ease the heavy, damp air typical of winter. As the year progresses, humidity levels tend to stabilize, with late spring and summer months showing more moderate figures, peaking again in the cooler months of autumn and winter. This cyclical pattern not only highlights the variations of Caernarfon's unique maritime climate but also offers a glimpse into the seasonal changes that characterize this charming coastal town.

March Average Humidity in Caernarfon

This chart illustrates the average monthly humidity levels in Caernarfon, 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%85%79%81%78%79%85%90%91%89%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Caernarfon

As March rolls into Caernarfon, the UV Index begins to rise, marking a transition from winter's low exposure levels to a more moderate level of sun intensity. With a UV Index of 4, residents and visitors should be aware that while the risk of harm from unprotected sun exposure is moderate, protective measures are still advisable, especially with a burn time of just 30 minutes. This upward trend in UV radiation hints at the approaching spring, as April is set to see a further increase to 5. It’s a reminder to embrace the longer days ahead while remaining sun smart. For more detailed insights and to keep track of the UV trends throughout the year, visit Caernarfon UV Index.

Maximum UV Index Levels in Caernarfon for March

The chart shows the monthly maximum UV Index (UVI) for Caernarfon 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Caernarfon 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 Caernarfon

As March unfurls in Caernarfon, the days become increasingly radiant, boasting a remarkable 228 hours of sunshine. This marks a notable rise from the 162 hours of February, signaling a delightful transition into longer, brighter spring days. The growing daylight is a precursor to even more sun-kissed months ahead, with April promising 335 hours and May soaring to an impressive 415 hours. This upward trajectory continues through the summer, peaking in July with 421 hours, before gradually tapering off into the autumn months. March, with its invigorating sunshine, not only heralds the approach of warmer weather but also invigorates the spirit, inviting residents and visitors alike to revel in the beauty of nature's awakening.

Monthly Sunshine Duration in Caernarfon: March Highlighted

The March sunshine duration represents the total number of hours Caernarfon 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.
JanFebMarAprMayJunJulAugSepOctNovDec93h162h228h335h415h404h421h383h315h238h126h109h
Data source: Caernarfon March Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Caernarfon During March

In Caernarfon, the chances of enjoying some sunshine in March are generally a modest 25%, reflecting a trend of gradually increasing likelihood as winter gives way to spring. This figure stands equal to that of February, suggesting a slow transition in weather patterns as the days grow longer. Yet, it's only in April that the likelihood significantly climbs to 46%, hinting that March often remains a transitional month, balancing between the lingering chill of winter and the hopeful warmth of spring. As we move into the brighter months, the chance of sunny weather becomes more pronounced, creating an anticipated shift that many locals and visitors alike look forward to.

Percentage of Sunny Days in March in Caernarfon

The chart illustrates the percentage of sunny days in Caernarfon 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 Caernarfon experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%25%25%46%30%25%35%24%20%17%19%23%
Data source: Caernarfon March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Caernarfon in March

As March unfolds in Caernarfon, the length of daylight begins to noticeably increase, offering residents an invigorating taste of spring. Transitioning from 9 hours of light in February, March boasts a generous 11 hours of daylight, heralding a rejuvenation of outdoor activities and vibrant sunsets. This month serves as a clear pivot point, setting the tone for the subsequent months: by April, daylight swells to 14 hours, and by May, it reaches 15 hours, as nature awakens in full bloom. This trend of escalating daylight continues to peak in the summer months, ultimately culminating in 16 hours of glorious sunlight in both June and July. Thus, March not only showcases a refreshing increase in daylight but also hints at the bright days ahead, inviting everyone to soak up more of the natural world.

Average Daylight Hours in Caernarfon for March

The chart illustrates the variation in daylight duration in Caernarfon throughout the year, with March highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 8m9h 50m11h 54m14h 1m15h 53m16h 52m16h 20m14h 39m12h 37m10h 31m8h 37m7h 36m
Data source: Caernarfon daylight hours, calculated by summing the hours between sunrise and sunset for each day.

March Winds in Caernarfon

March in Caernarfon presents a unique blend of breezy charm, with an average wind speed of 5.2 m/s (12 mph), slightly lower than the gustier months of January and February. As winter fades away, the winds begin to mellow, yet they remain invigorating, hinting at the arrival of spring. Compared to the previous months, this transitional period showcases a notable dip from February’s stronger gales, while still maintaining enough zest to keep outdoor activities lively. Looking ahead, April promises to be even calmer, with an average wind speed of just 3.3 m/s (7 mph), marking a shift towards the gentler breezes characteristic of springtime in Caernarfon. Overall, March serves as a bridge between the colder months and the softer, warmer days ahead, making it a delightful time to experience the changing landscape.

Average March Wind Speed in Caernarfon

The chart displays monthly wind speed patterns in Caernarfon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.65.85.2 m/s3.34.03.82.73.83.35.54.85.0
Data source: Caernarfon March wind data, generated using information from the Copernicus Climate Change Service.

How March Weather in Caernarfon Compares to Other Months

The weather in Caernarfon 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 Caernarfon and find detailed weather information for every month.

In comparing the weather between January and March, January displays slightly milder temperatures with a minimum of -3°C (27°F) and an average of 6°C (43°F). In contrast, March sees a more noticeable range, with temperatures dipping to a minimum of -5°C (23°F) but peaking higher at 18°C (65°F) on average. Precipitation levels are also higher in March, totaling 104 mm (4.1 in) over 18 days, compared to January's 77 mm (3.0 in) over 13 days. Humidity remains quite high for both months, with January at 89% and March slightly lower at 86%. For a more detailed look at January weather, visit Caernarfon weather in January.

March experiences slightly colder temperatures than February, with an average of 7°C (45°F) compared to February's 6°C (44°F). Both months share the same maximum temperature of 18°C (65°F), but March sees a slightly lower minimum temperature of -5°C (23°F) compared to February's -4°C (26°F). Precipitation levels are similar, with March receiving 104 mm (4.1 in) over 18 days and February close behind at 103 mm (4.1 in) over 16 days. Interestingly, humidity is marginally higher in March at 86%, compared to February's 88%. For more insights on February weather, visit Caernarfon weather in February.

March and April present a notable contrast in weather conditions. In March, temperatures can dip as low as -5°C (23°F) with an average of 7°C (45°F) and maximums reaching 18°C (65°F). This month experiences significant precipitation, totaling 104 mm (4.1 in) over 18 days, coupled with high humidity at 86%. In comparison, April brings milder temperatures, ranging from a minimum of -1°C (31°F) to an average of 9°C (48°F) and a maximum of 22°C (72°F). Additionally, April sees reduced precipitation at 55 mm (2.2 in) across 11 days and slightly lower humidity at 84%. For more detailed information on April's weather, you can visit Caernarfon weather in April.

March and May present contrasting weather conditions as spring progresses. In March, temperatures range from a chilly -5°C (23°F) at night to a mild 18°C (65°F) during the day, with an average of 7°C (45°F). The month sees a considerable amount of precipitation, totaling 104 mm (4.1 in) over 18 days and high humidity at 86%. In contrast, May enjoys warmer weather, featuring temperatures from a low of 0°C (32°F) to a high of 28°C (82°F), with an average of 12°C (53°F). The precipitation in May is lighter at 71 mm (2.8 in) over 12 days, and humidity levels are slightly lower at 79%. For a closer look at the weather conditions specific to this month, you can check Caernarfon weather in May.

March and June present contrasting weather profiles. In March, temperatures range from a chilly -5°C (23°F) at night to a mild 18°C (65°F) during the day, with an average of 7°C (45°F). The month is characterized by high humidity at 86% and significant precipitation of 104 mm (4.1 in) over 18 rainy days. In contrast, June offers a much warmer climate, with temperatures starting at a minimum of 5°C (41°F) and peaking at 29°C (84°F), averaging around 15°C (59°F). While June sees slightly less rainfall at 91 mm (3.6 in) over 14 days and slightly lower humidity at 81%, it creates a much more pleasant and inviting atmosphere. For more details, visit Caernarfon weather in June.

The weather in March is notably cooler compared to July, with temperatures ranging from a minimum of -5°C (23°F) to a maximum of 18°C (65°F), averaging around 7°C (45°F). In contrast, July experiences milder conditions, with temperatures starting at 7°C (45°F) and soaring to 29°C (85°F), averaging 16°C (61°F). March also sees higher precipitation levels, totaling 104 mm (4.1 in) over 18 days, while July has less rainfall at 82 mm (3.2 in) across 15 days, resulting in a lower humidity level of 78% compared to March's 86%. For more detailed insights into July weather, you can check Caernarfon weather in July.

March and August present contrasting weather conditions, reflecting the transition from late winter to summer. In March, temperatures can drop as low as -5°C (23°F), with an average temperature of 7°C (45°F) and a maximum of 18°C (65°F). The month experiences significant precipitation, with 104 mm (4.1 in) of rain over approximately 18 days and high humidity levels at 86%.

In contrast, August features milder temperatures ranging from a minimum of 8°C (46°F) to an average of 16°C (61°F), and a maximum of 26°C (79°F). The precipitation remains similar at 105 mm (4.1 in) but occurs over 19 days, and the humidity decreases to 79%. Overall, March is cooler, wetter, and more humid compared to the warmer and drier conditions of August. For more specific details about August weather, you can visit Caernarfon weather in August.

March and September present distinctly different weather characteristics. In March, temperatures range from a chilly minimum of -5°C (23°F) to a pleasant maximum of 18°C (65°F), with an average of 7°C (45°F). The month sees considerable precipitation, totaling 104 mm (4.1 in) over 18 days, and humidity is quite high at 86%. In contrast, September boasts milder temperatures, with a minimum of 3°C (38°F) and a maximum reaching 27°C (81°F), averaging at 14°C (57°F). While precipitation is slightly lower at 98 mm (3.9 in) over 15 days, humidity remains comparable at 85%. For more specific insights on weather conditions in September, you can check Caernarfon weather in September.

In March, temperatures range from a chilly -5°C (23°F) at night to a pleasant 18°C (65°F) during the day, with an average of 7°C (45°F). The month experiences about 104 mm (4.1 in) of precipitation over 18 days and has a high humidity level of 86%. In contrast, October offers slightly milder temperatures, with a minimum of -2°C (29°F) and a maximum of 22°C (71°F), averaging around 11°C (53°F). Precipitation is higher at 128 mm (5.1 in) over the same number of rainy days, and humidity rises slightly to 90%. For a detailed look at how the weather impacts daily life, check out Caernarfon weather in October.

March and November present similar yet distinct weather patterns. In March, temperatures range from a chilly -5°C (23°F) at night to a mild average of 7°C (45°F), with daytime highs reaching up to 18°C (65°F). This month typically experiences 104 mm (4.1 in) of precipitation over 18 days, while humidity levels are high at 86%. In contrast, November's temperatures are slightly milder, with a minimum of -1°C (31°F), an average of 9°C (48°F), and a maximum of 15°C (60°F). Precipitation in November is a bit higher at 111 mm (4.4 in) spread over 19 days, along with increased humidity of 91%. Overall, while both months are characterized by cool temperatures and frequent rainfall, November tends to be slightly more humid and wet. For more details, check Caernarfon weather in November.

March and December present distinct weather patterns, with both months featuring similar average temperatures of around 7°C (45°F). However, March experiences a wider temperature range, from a chilly minimum of -5°C (23°F) to a relatively warm maximum of 18°C (65°F), whereas December's temperatures vary from -1°C (30°F) to a more moderate maximum of 13°C (56°F). In terms of precipitation, December is generally wetter, with 129 mm (5.1 in) over 20 days, compared to March's 104 mm (4.1 in) over 18 days. Humidity levels are quite high in both months, but December has a slightly higher average at 89%, indicating a more damp atmosphere. For more detailed insights about December weather, you can visit Caernarfon weather in December.

Compare Caernarfon's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in Caernarfon

As March unfolds in Caernarfon, it brings a notable transition from the depths of winter to the hints of spring. Daytime temperatures begin to edge upwards, offering a refreshing break from the chill, yet the brisk air still lingers with an average that hovers around 7°C. Unlike the drier summer months, March is characterized by considerable precipitation, with rain gracing the skies on nearly half the days, contributing to the lush greenery of the region. The high humidity levels create a cool, damp atmosphere, making early spring walks a unique experience. For those wanting to delve deeper into the weather nuances of Caernarfon, be sure to visit Caernarfon Climate.