May Weather in Merthyr Mawr, United Kingdom

Last updated: March 17, 2025

In May, Merthyr Mawr basks in a diverse range of weather, showcasing a maximum temperature of 24°C (75°F), while the average settles at a mild 12°C (54°F) and drops to a chilly minimum of 2°C (36°F) at night. This month sees a total precipitation of 80 mm (3.2 in) across 12 days, contributing to the lush greenery of the area. With an average humidity level of 80%, the weather creates a refreshing, albeit damp, atmosphere, perfect for exploring the stunning landscapes that Merthyr Mawr has to offer.

May Temperature in Merthyr Mawr

In May, Merthyr Mawr transforms into a lively spring destination, with temperatures reflecting the warmth of approaching summer. The month starts to showcase a noticeable rise, with minimum temperatures settling at 2°C (36°F) and averages reaching 12°C (54°F). As the days progress, the peaks soar to a delightful 24°C (75°F)—the warmth allowing for both outdoor exploration and relaxation. This pattern establishes a clear upward trend from the cooler months of April and March, where temperatures began to hint at the vibrant springtime atmosphere. With this promising climate, May invites visitors to bask in the blooming beauty of the Welsh countryside.

May Weather in Merthyr Mawr: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Merthyr Mawr, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434345495459636258544845
Data source: Temperature data for Merthyr Mawr 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.

May Precipitation in Merthyr Mawr

In May, Merthyr Mawr experiences a total precipitation of 80 mm (3.2 in) over approximately 12 days, presenting a moderate start to the summer season. This amount reflects a slight increase from the preceding month of April, which saw 56 mm (2.2 in) of rain over only 10 days. The consistent rainfall during May indicates a trend of spring showers that help nourish the lush landscapes as the region transitions into warmer months. Though lower than the heavier downpours of earlier months like October and November, May's precipitation continues to support the area's vibrant greenery without overwhelming it. The balance of rainfall days also mirrors the shift into summer, where sporadic showers play a crucial role in the region's temperate climate.

May Precipitation Trends in Merthyr Mawr

The chart displays monthly precipitation patterns in Merthyr Mawr, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec831111015780858610693146111144
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Merthyr Mawr

As May rolls into Merthyr Mawr, the air begins to feel more invigorating with a drop in humidity to 80%. This marks a continuation of the gradual decrease observed since the height of winter, where humidity levels lingered around an impressive 88% in January and February. Compared to the wetter months earlier in the year, May offers a refreshing respite, suggesting a transition towards the livelier summer months ahead. Interestingly, June maintains this humidity level, but with July and August following with even lower readings, it becomes evident that Merthyr Mawr is poised for a delightful shift to more comfortable, drier conditions. This trend hints at the onset of a more enjoyable outdoor experience as the landscape flourishes into summer.

May Average Humidity in Merthyr Mawr

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

May UV Index in Merthyr Mawr

As May arrives in Merthyr Mawr, the UV Index reaches 7, signaling high exposure that requires mindful sun protection. This upward trend from the previous months indicates a shift towards stronger sunlight, with burn times decreasing to just 25 minutes. Following a gradual increase since March, where the UV Index was at a moderate 4, May stands as a pivotal month, setting the stage for the approaching summer. With June anticipated to escalate further to a very high 8, residents and visitors alike should remain vigilant while enjoying the outdoors. As always, stay informed and prepared by checking the full details at Merthyr Mawr UV Index.

Maximum UV Index Levels in Merthyr Mawr for May

The chart shows the monthly maximum UV Index (UVI) for Merthyr Mawr in May, 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: Merthyr Mawr May 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.

May Sunshine in Merthyr Mawr

In Merthyr Mawr, May brings a delightful surge in sunshine, with an impressive 393 hours of bright days that blossom in contrast to the earlier months. This increase is a continuation of a robust upward trend that starts in January, where sunlight hours are a modest 87 hours, gradually building through the spring. By the time April rolls around, the community is basking in 320 hours of sunlight, setting the stage for May's sunshine extravaganza. This peak not only heralds warmer weather but also a vibrant landscape, as nature bursts forth in full bloom. The sun-soaked days of May lay the groundwork for a beautifully illuminated summer that follows, showcasing the best of what Merthyr Mawr has to offer.

Monthly Sunshine Duration in Merthyr Mawr: May Highlighted

The May sunshine duration represents the total number of hours Merthyr Mawr experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec87h142h205h320h393h373h410h362h296h233h128h104h
Data source: Merthyr Mawr May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Merthyr Mawr During May

May in Merthyr Mawr brings a promising yet somewhat unpredictable chance of sunshine, with the likelihood standing at 33%. While this figure showcases a notable drop from the sunnier 54% of April, it still represents a decent opportunity for outdoor activities as spring transitions into summer. Interestingly, the chance of sun starts to dwindle in the following months, with June at 27% and July slightly rebounding to 41%. Therefore, although May may not deliver the sun-soaked days one might hope for, it remains a key month in the spectrum of weather, bridging the brightness of spring with the warmth of early summer.

Percentage of Sunny Days in May in Merthyr Mawr

The chart illustrates the percentage of sunny days in Merthyr Mawr throughout the year, with May 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 Merthyr Mawr experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%23%30%54%33%27%41%32%28%21%30%20%
Data source: Merthyr Mawr May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Merthyr Mawr in May

In Merthyr Mawr, United Kingdom, daylight duration undergoes a striking transformation as the year progresses. January begins with a modest 8 hours of daylight, gradually increasing to 9 hours in February. This upward trend accelerates in spring; by March, the days stretch to 11 hours, and by April, they reach a welcoming 13 hours. May marks the peak of this seasonal shift, bringing a delightful 15 hours of daylight that invites outdoor adventures and relaxation. The sun continues to shine brightly in June and July, each boasting 16 hours, before a gentle decline begins in August with 14 hours. As autumn approaches, daylight wanes, falling to 12 hours in September, and further to 10 hours in October, before returning to 8 hours in November and dwindling to 7 hours by December. This rhythmic cycle of light showcases nature's ability to ebb and flow, offering residents a dynamic interplay between brightness and the quiet embrace of winter.

Average Daylight Hours in Merthyr Mawr for May

The chart illustrates the variation in daylight duration in Merthyr Mawr throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 23m9h 58m11h 55m13h 54m15h 39m16h 33m16h 4m14h 30m12h 35m10h 36m8h 49m7h 52m
Data source: Merthyr Mawr daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Merthyr Mawr

In May, the winds in Merthyr Mawr pick up slightly, with an average speed of 4.9 m/s (11 mph), marking a gentle transition from the lighter breezes of April. This month typically enjoys a stable wind pattern, as it stands out with speeds significantly higher than the seasonal lull experienced in April. As summer approaches, the winds become softer, with June and July recording the lowest averages of the year at 3.6 m/s (8 mph) and 3.5 m/s (8 mph), respectively. However, May's moderate winds enhance the lush landscapes, making it an ideal time for outdoor activities amidst the scenic beauty of the region. Overall, it's a delightful month that balances mild wind with the burgeoning vibrancy of late spring.

Average May Wind Speed in Merthyr Mawr

The chart displays monthly wind speed patterns in Merthyr Mawr, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec5.36.05.13.94.9 m/s3.63.54.43.85.14.45.7
Data source: Merthyr Mawr May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Merthyr Mawr Compares to Other Months

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

In comparing the weather in May and January, it is evident that May offers milder temperatures, with an average of 12°C (54°F) compared to January's cooler average of 6°C (43°F). While both months experience a comparable amount of precipitation—80 mm (3.2 in) in May and 83 mm (3.3 in) in January—January tends to feel wetter due to higher humidity levels at 88% versus May's 80%. Overall, May's warmer temperatures and slightly lower humidity make it a more pleasant month for outdoor activities than the colder and more humid January. For detailed weather information, you can check Merthyr Mawr weather in January.

When comparing the weather in May and February, there are notable differences in temperature and precipitation. In May, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (75°F), with an average of 12°C (54°F). In contrast, February sees lower temperatures, with a minimum of -3°C (26°F) and a maximum of 15°C (59°F), resulting in an average of only 6°C (44°F). Additionally, February experiences more precipitation, with 111 mm (4.4 in) over 15 days, compared to May's 80 mm (3.2 in) over 12 days. The humidity is slightly higher in February at 88%, compared to 80% in May. For more detailed information, you can check Merthyr Mawr weather in February.

When comparing the weather in March and May, notable differences emerge. March features colder temperatures, with a minimum of -5°C (23°F) and an average of 7°C (45°F), while May sees considerably warmer conditions, with an average temperature of 12°C (54°F) and a maximum of 24°C (75°F). Additionally, March experiences more precipitation, totaling 101 mm (4.0 in) over 17 days, compared to May’s 80 mm (3.2 in) across 12 days. However, March also has a slightly higher humidity level at 86%, compared to May's 80%. For a detailed look at March's weather patterns, you can explore Merthyr Mawr weather in March.

In comparing the weather of May and April, we see a notable transition as spring unfolds. May experiences slightly warmer temperatures, with an average of 12°C (54°F) compared to April's cooler average of 9°C (49°F). The minimum temperatures in May are also higher, starting at 2°C (36°F) versus April's -1°C (30°F). Interestingly, although May has more total precipitation at 80 mm (3.2 in) over 12 days, it maintains a similar level of humidity at 80%, slightly lower than April's 84%. For a closer look at April's specifics, you can explore Merthyr Mawr weather in April.

May and June present a gradual warming trend as spring transitions into summer. In May, temperatures range from a chilly minimum of 2°C (36°F) to a pleasant maximum of 24°C (75°F), with an average temperature of 12°C (54°F). The month sees about 80 mm (3.2 in) of precipitation over 12 days, coupled with a humidity level of 80%. In contrast, June experiences a notable increase in temperature, with minimums at 7°C (45°F) and maximums reaching 27°C (81°F), bringing the average to 15°C (60°F). The amount of precipitation remains similar at 85 mm (3.3 in) over 13 days, while humidity stays constant at 80%. For more detailed insights into the weather during this month, you can visit Merthyr Mawr weather in June.

In comparing the weather of May and July, we see a notable progression in temperature and conditions. May experiences cooler temperatures, with an average of 12°C (54°F) and a max of 24°C (75°F), while July boasts a warmer average of 17°C (63°F) and reaches highs of 27°C (81°F). Precipitation remains fairly consistent, with May recording 80 mm (3.2 in) over 12 days and July slightly higher at 86 mm (3.4 in) over the same number of days. Additionally, humidity decreases from 80% in May to 70% in July, making the latter month feel somewhat drier and more comfortable. For more details on July's climate, check out Merthyr Mawr weather in July.

May and August exhibit notable differences in weather patterns. In May, temperatures range from a chilly minimum of 2°C (36°F) to a pleasant maximum of 24°C (75°F), with an average of 12°C (54°F). This month sees around 80 mm (3.2 in) of precipitation spread over 12 days, accompanied by high humidity levels at 80%. In contrast, August enjoys warmer temperatures, starting at a minimum of 9°C (48°F) and reaching up to 28°C (82°F), with an average of 16°C (62°F). However, it also experiences more precipitation, totaling 106 mm (4.2 in) over 16 days, though the humidity is slightly lower at 73%. For more details on the weather during August, you can check Merthyr Mawr weather in August.

In comparing the weather of May and September, we can observe notable differences and similarities. May tends to have slightly cooler temperatures, with a minimum of 2°C (36°F) and an average of 12°C (54°F), while September experiences milder temperatures, with a minimum of 5°C (41°F) and an average of 15°C (59°F). Both months feature similar humidity levels, hovering around 80% in May and 79% in September, contributing to a relatively humid atmosphere. Precipitation in September is marginally higher at 92 mm (3.6 in), compared to May's 80 mm (3.2 in), with both months recording rainfall on around 12 days. For more details about September weather, you can check Merthyr Mawr weather in September.

In May, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (75°F), with an average of 12°C (54°F). Rainfall is moderate at 80 mm (3.2 in) across about 12 days, while humidity sits at 80%. In contrast, October brings cooler temperatures, with a low of 1°C (33°F) and a high of 21°C (70°F), also averaging 12°C (54°F). However, it experiences significantly more rainfall at 146 mm (5.7 in) over approximately 17 days, alongside increased humidity of 89%. For a detailed look at October's weather specifics, check out Merthyr Mawr weather in October.

May and November present quite distinct weather patterns. In May, temperatures generally range from a minimum of 2°C (36°F) to a maximum of 24°C (75°F), with an average of about 12°C (54°F). The month experiences approximately 80 mm (3.2 in) of precipitation over about 12 days, along with a humidity level of 80%. In contrast, November features cooler temperatures, with a minimum of -1°C (31°F), an average of 9°C (48°F), and a maximum of 16°C (60°F). This month sees increased precipitation, totaling around 111 mm (4.4 in) over roughly 16 days, along with a higher humidity level of 90%. For a more detailed look at November conditions, check out Merthyr Mawr weather in November.

May and December present contrasting weather conditions, with May typically enjoying milder temperatures and more variable weather. In May, temperatures range from a minimum of 2°C (36°F) to a maximum of 24°C (75°F), with an average of 12°C (54°F). The month sees about 80 mm (3.2 in) of precipitation over approximately 12 days, contributing to a humidity level of 80%. In contrast, December experiences colder temperatures, with a minimum of -2°C (29°F) and a maximum of 13°C (55°F), averaging at 7°C (45°F). This month is also wetter, receiving around 144 mm (5.7 in) of rain spread over 18 days, resulting in higher humidity at 89%. For more details on how December in this region shapes up, you can check Merthyr Mawr weather in December.

Compare Merthyr Mawr's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Merthyr Mawr

As May unfolds in Merthyr Mawr, the weather offers a captivating shift that stands out from other months. With a maximum temperature reaching a pleasant 24°C (75°F), the warmth invites outdoor exploration, while the average of 12°C (54°F) provides a refreshing contrast to the cooler early spring. However, this delightful warmth comes with an increase in precipitation—the region experiences about 80 mm of rain over 12 days, making it one of the wetter months. The humidity lingers around 80%, adding a touch of tropical feel to the air. This unique combination of warmth and moisture not only nourishes the lush landscape but also sets the stage for vibrant spring blooms. For a deeper understanding of seasonal changes, visit Merthyr Mawr Climate.