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May Weather in Altona, United States

Last updated: June 24, 2025

In Altona, United States, the average temperature in May hovers around 10°C (50°F). Expect a broad temperature range with a minimum of -8°C (17°F) and a maximum reaching up to 27°C (81°F). During this month, anticipate 136 mm (5.4 in) of precipitation spread across approximately 18 days, contributing to an average humidity of 67%. Get ready for a mix of chilly days and occasional warmth!

May Temperature in Altona

In May in Altona, the average temperature is 10°C (50°F), with maximums reaching 27°C (81°F) and minimums dropping as low as -8°C (17°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates May temperature patterns in Altona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altona, May typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (81°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec262635425063686661443629
Data source: Temperature data for Altona 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 Altona

In Altona in May, the total precipitation amount is 136 mm (5.4 in) spread over 18 days.

May Precipitation Trends in Altona

The chart displays monthly precipitation patterns in Altona, 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 Altona, May typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec2537646913680908142473021
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Altona

In Altona in May humidity is 67%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill, making it essential for travelers to layer their clothing and prepare for a rather brisk experience while exploring the surroundings.

May Average Humidity in Altona

This chart illustrates the average monthly humidity levels in Altona, 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 Altona is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%86%75%67%67%68%62%63%63%72%80%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Altona

In Altona in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Altona.

Maximum UV Index Levels in Altona for May

The chart shows the monthly maximum UV Index (UVI) for Altona 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 Altona typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46811111212119643
Data source: Altona 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 Altona Compares to Other Months

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

This table compares monthly weather conditions in Altona, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)25 mm (1.0 inches)84%moderate
February Weather-4°C (26°F)37 mm (1.5 inches)85%high
March Weather2°C (35°F)64 mm (2.5 inches)75%very high
April Weather5°C (42°F)69 mm (2.7 inches)67%extreme
May Weather10°C (50°F)136 mm (5.4 inches)67%extreme
June Weather17°C (63°F)80 mm (3.2 inches)68%extreme
July Weather20°C (68°F)89 mm (3.5 inches)62%extreme
August Weather19°C (67°F)81 mm (3.2 inches)63%extreme
September Weather16°C (61°F)42 mm (1.7 inches)63%very high
October Weather7°C (45°F)47 mm (1.9 inches)72%high
November Weather2°C (36°F)30 mm (1.2 inches)79%moderate
December Weather-1°C (30°F)21 mm (0.8 inches)85%moderate

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