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April Weather in Altona, United States

Last updated: June 24, 2025

In April, the average temperature in Altona, United States hovers around 5°C (42°F). Expect a minimum dip to -16°C (3°F) and a max rise to 24°C (75°F). This month witnesses a total precipitation of 69 mm (2.7 in) spread over 12 days, with an average humidity level of 67%. Enjoy the variety!

April Temperature in Altona

In April in Altona, the average temperature is 5°C (42°F). The maximum can reach 24°C (75°F), while the minimum can drop as low as -16°C (3°F). This wide range of temperatures means visitors should be prepared for both mild and chilly weather when traveling.

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

The chart illustrates April 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, April typically has an average temperature of 5°C (42°F), with highs reaching up to 24°C (75°F) and lows dropping to around -16°C (3°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.

April Precipitation in Altona

In Altona in April, the precipitation amount is 69 mm (2.7 in) over the span of 12 days.

April Precipitation Trends in Altona

The chart displays monthly precipitation patterns in Altona, 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 Altona, April typically receives around 69 mm (2.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec2537646913680908142473021
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Altona

In Altona in April, humidity is 67%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm while you explore.

April Average Humidity in Altona

This chart illustrates the average monthly humidity levels in Altona, 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 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 April generated using information from the Copernicus Climate Change Service.

April UV Index in Altona

In Altona in April, 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 April

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

Weather in Altona varies notably across the year, with each month offering distinct climate conditions. This page compares April’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 April’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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