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May Weather in Altdorf, Germany

Last updated: August 23, 2025

The average temperature in Altdorf, Germany for the month of May is 13°C (56°F). However, temperatures can vary significantly, with a minimum of -1°C (31°F) and a maximum soaring up to 30°C (86°F). This month also brings 96 mm (3.8 in) of precipitation spread over approximately 14 days and an average humidity level of 79%, creating a unique climate experience.

May Temperature in Altdorf

In May in Altdorf, the average temperature is 13°C (56°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop as low as -1°C (31°F). Be prepared for a wide range of temperatures during your travels.

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

The chart illustrates May 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, May typically has an average temperature of 13°C (56°F), with highs reaching up to 30°C (86°F) and lows dropping to around -1°C (31°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.

May Precipitation in Altdorf

In Altdorf in May, the total precipitation amount is 96 mm (3.8 in) over the course of 14 days.

May Precipitation Trends in Altdorf

The chart displays monthly precipitation patterns in Altdorf, 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. In Altdorf, May typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec79728445961008796557455105
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Altdorf

In Altdorf in May, humidity is 79%. With an average temperature of 13°C (56°F), this humidity feels like a damp, cool blanket wrapping around you, making traveling slightly uncomfortable and requiring you to dress in layers to stay comfortable while exploring.

May Average Humidity in Altdorf

This chart illustrates the average monthly humidity levels in Altdorf, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Altdorf is approximately 79%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Altdorf

In Altdorf in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Altdorf.

Maximum UV Index Levels in Altdorf for May

The chart shows the monthly maximum UV Index (UVI) for Altdorf 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. In May, the maximum UV index in Altdorf typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Altdorf 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.

How May 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 May’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 May’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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