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April Weather in Altdorf, Germany

Last updated: August 23, 2025

In April, the average temperature in Altdorf, Germany hovers around 9°C (49°F), with lows dipping to a chilly -5°C (24°F) and highs peaking at a warm 27°C (80°F). Expect about 45 mm (1.8 in) of precipitation spread over 9 days, contributing to an average humidity of 83%. Whether you’re bracing for brisk breezes or welcoming sunny spells, be prepared for a diverse climate!

April Temperature in Altdorf

In April in Altdorf, the average temperature is 9°C (49°F). The maximum can reach 27°C (80°F), and the minimum can be as low as -5°C (24°F). Expect a wide temperature range, so pack layers for your travels!

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

The chart illustrates April temperature patterns in Altdorf, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altdorf, April typically has an average temperature of 9°C (49°F), with highs reaching up to 27°C (80°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec343842495565676659514137
Data source: Temperature data for Altdorf 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 Altdorf

In Altdorf in April, the precipitation amount is 45 mm (1.8 in) spread over 9 days.

April Precipitation Trends in Altdorf

The chart displays monthly precipitation patterns in Altdorf, 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 Altdorf, April typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec79728445961008796557455105
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

April Humidity in Altdorf

In Altdorf in April, humidity is 83%. With an average temperature of 9°C (49°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable for traveling and requiring extra layers to stay warm and dry.

April Average Humidity in Altdorf

This chart illustrates the average monthly humidity levels in Altdorf, 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 Altdorf is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%83%79%82%83%84%86%88%89%91%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Altdorf

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

Maximum UV Index Levels in Altdorf for April

The chart shows the monthly maximum UV Index (UVI) for Altdorf 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 Altdorf typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Altdorf 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 Altdorf Compares to Other Months

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

This table compares monthly weather conditions in Altdorf, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)79 mm (3.1 inches)91%low
February Weather3°C (38°F)72 mm (2.8 inches)89%moderate
March Weather6°C (42°F)84 mm (3.3 inches)87%moderate
April Weather9°C (49°F)45 mm (1.8 inches)83%high
May Weather13°C (56°F)96 mm (3.8 inches)79%very high
June Weather18°C (65°F)100 mm (3.9 inches)82%very high
July Weather19°C (67°F)87 mm (3.4 inches)83%very high
August Weather19°C (67°F)96 mm (3.8 inches)84%very high
September Weather15°C (59°F)55 mm (2.1 inches)85%high
October Weather11°C (51°F)74 mm (2.9 inches)88%moderate
November Weather5°C (41°F)55 mm (2.2 inches)89%low
December Weather3°C (38°F)105 mm (4.1 inches)91%low

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