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April Weather in Mertert, Luxembourg

Last updated: August 23, 2025

In April, the average temperature in Mertert, Luxembourg hovers around 9°C (49°F). Temperatures can vary significantly, with minimums dipping to -3°C (27°F) and maximums reaching a pleasant 26°C (79°F). Visitors should be prepared for some moisture, as the region sees around 43 mm (1.7 in) of precipitation over 9 days. Additionally, the air is typically quite humid, with an average humidity of 84%.

April Temperature in Mertert

In April in Mertert, the average temperature is 9°C (49°F). Maximums can reach 26°C (79°F) and minimums can be as low as -3°C (27°F). This variation in temperature makes it essential to pack layers for your travels to Mertert.

April Weather in Mertert: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Mertert, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mertert, April typically has an average temperature of 9°C (49°F), with highs reaching up to 26°C (79°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec353842495564666558514138
Data source: Temperature data for Mertert 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 Mertert

In Mertert in April, the precipitation amount reaches 43 mm (1.7 in) over the course of 9 days.

April Precipitation Trends in Mertert

The chart displays monthly precipitation patterns in Mertert, 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 Mertert, April typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7780914379767365647971131
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Mertert

In Mertert in April, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

April Average Humidity in Mertert

This chart illustrates the average monthly humidity levels in Mertert, 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 Mertert is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%88%84%81%82%82%80%83%89%91%93%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Mertert

In Mertert 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 Mertert, you can refer to this Hourly UV Index in Mertert.

Maximum UV Index Levels in Mertert for April

The chart shows the monthly maximum UV Index (UVI) for Mertert 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 Mertert typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234689876421
Data source: Mertert 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 Mertert Compares to Other Months

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

This table compares monthly weather conditions in Mertert, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)77 mm (3.0 inches)91%low
February Weather3°C (38°F)80 mm (3.1 inches)90%moderate
March Weather6°C (43°F)91 mm (3.6 inches)88%moderate
April Weather9°C (49°F)43 mm (1.7 inches)84%high
May Weather13°C (55°F)79 mm (3.1 inches)81%very high
June Weather18°C (64°F)76 mm (3.0 inches)82%very high
July Weather19°C (66°F)73 mm (2.9 inches)82%very high
August Weather18°C (65°F)65 mm (2.6 inches)80%high
September Weather14°C (58°F)64 mm (2.5 inches)83%high
October Weather10°C (51°F)79 mm (3.1 inches)89%moderate
November Weather5°C (42°F)71 mm (2.8 inches)91%low
December Weather4°C (39°F)131 mm (5.2 inches)93%low

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