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March Weather in Merthyr Tydfil, United Kingdom

Last updated: August 27, 2025

In Merthyr Tydfil, United Kingdom, the weather in March brings an average temperature of 6°C (43°F). Daily highs can reach up to 19°C (66°F), while chilly evenings may dip to a minimum of -7°C (19°F). This month also sees precipitation averaging 111 mm (4.4 in) over 17 days, resulting in a notably high humidity level of 86%. Be prepared for a mix of cool conditions and occasional rain!

March Temperature in Merthyr Tydfil

In March in Merthyr Tydfil, the average temperature is 6°C (43°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -7°C (19°F). Be sure to pack layers to stay comfortable in varying temperatures during your travels!

March Weather in Merthyr Tydfil: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Merthyr Tydfil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merthyr Tydfil, March typically has an average temperature of 6°C (43°F), with highs reaching up to 19°C (66°F) and lows dropping to around -7°C (19°F).
JanFebMarAprMayJunJulAugSepOctNovDec404143475258615956514543
Data source: Temperature data for Merthyr Tydfil 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 Merthyr Tydfil

In Merthyr Tydfil in March, the precipitation amount is 111 mm (4.4 in) spread over 17 days.

March Precipitation Trends in Merthyr Tydfil

The chart displays monthly precipitation patterns in Merthyr Tydfil, 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 Merthyr Tydfil, March typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec821241116493919311492143117144
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Merthyr Tydfil

In Merthyr Tydfil in March humidity is 86%. With an average temperature of 6°C (43°F), this humidity feels like a chilling blanket enveloping you, making outdoor exploration feel damp and uncomfortable.

March Average Humidity in Merthyr Tydfil

This chart illustrates the average monthly humidity levels in Merthyr Tydfil, 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 Merthyr Tydfil is approximately 86%, offering insight into how humid the weather typically is during this month.
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 Merthyr Tydfil

In Merthyr Tydfil in March, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Merthyr Tydfil for better planning.

Maximum UV Index Levels in Merthyr Tydfil for March

The chart shows the monthly maximum UV Index (UVI) for Merthyr Tydfil 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 Merthyr Tydfil typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Merthyr Tydfil 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.

How March Weather in Merthyr Tydfil Compares to Other Months

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

This table compares monthly weather conditions in Merthyr Tydfil, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)82 mm (3.2 inches)88%low
February Weather5°C (42°F)124 mm (4.9 inches)88%low
March Weather6°C (43°F)111 mm (4.4 inches)86%moderate
April Weather8°C (47°F)64 mm (2.5 inches)84%high
May Weather11°C (52°F)93 mm (3.7 inches)80%high
June Weather14°C (58°F)91 mm (3.6 inches)80%very high
July Weather16°C (61°F)93 mm (3.7 inches)70%very high
August Weather15°C (60°F)114 mm (4.5 inches)73%high
September Weather13°C (56°F)92 mm (3.6 inches)79%high
October Weather10°C (51°F)143 mm (5.6 inches)89%moderate
November Weather7°C (45°F)117 mm (4.6 inches)90%low
December Weather6°C (43°F)144 mm (5.7 inches)89%low

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