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April Weather in Merthyr Tydfil, United Kingdom

Last updated: August 27, 2025

In April, the average temperature in Merthyr Tydfil, United Kingdom hovers around 8°C (47°F). Expect a minimum of -4°C (26°F) and a maximum of 21°C (70°F). During this period, precipitation totals approximately 64 mm (2.5 in) over about 10 days, with an average humidity of 84%. Prepare for a mix of chilly and milder days!

April Temperature in Merthyr Tydfil

In April in Merthyr Tydfil, the average temperature is 8°C (47°F). Maximums can reach 21°C (70°F), while minimums can drop as low as -4°C (26°F). Be sure to pack layers to stay comfortable while exploring the varying temperatures!

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

The chart illustrates April 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, April typically has an average temperature of 8°C (47°F), with highs reaching up to 21°C (70°F) and lows dropping to around -4°C (26°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.

April Precipitation in Merthyr Tydfil

In Merthyr Tydfil in April, the precipitation amount is 64 mm (2.5 in) over a span of 10 days.

April Precipitation Trends in Merthyr Tydfil

The chart displays monthly precipitation patterns in Merthyr Tydfil, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Merthyr Tydfil, April typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec821241116493919311492143117144
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Merthyr Tydfil

In Merthyr Tydfil in April, humidity is 84%. With an average temperature of 8°C (47°F), this humidity feels like a damp blanket wrapping around you, making travel feel heavy and a bit lethargic, as the air thickens with moisture and each step becomes a little more cumbersome.

April Average Humidity in Merthyr Tydfil

This chart illustrates the average monthly humidity levels in Merthyr Tydfil, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Merthyr Tydfil is approximately 84%, 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 April generated using information from the Copernicus Climate Change Service.

April UV Index in Merthyr Tydfil

In Merthyr Tydfil in April, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Merthyr Tydfil, you can refer to this Hourly UV Index in Merthyr Tydfil.

Maximum UV Index Levels in Merthyr Tydfil for April

The chart shows the monthly maximum UV Index (UVI) for Merthyr Tydfil in April, 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 April, the maximum UV index in Merthyr Tydfil typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Merthyr Tydfil April 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 April 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 April’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 April’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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