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April Weather in Alterswil, Switzerland

Last updated: August 27, 2025

In Alterswil, Switzerland, the average temperature in April hovers around 8°C (46°F), with a chill that can dip as low as -11°C (13°F) and a rare warm spell peaking at 23°C (74°F). Expect about 71 mm (2.8 in) of precipitation over 11 days, accompanied by a high average humidity of 84%. Be prepared for a mix of weather as you enjoy the unique atmosphere of this month!

April Temperature in Alterswil

In April in Alterswil, the average temperature is 8°C (46°F), with maximums reaching 23°C (74°F) and minimums dipping as low as -11°C (13°F). When traveling, be prepared for a wide range of temperatures and dress in layers to stay comfortable throughout the day.

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

The chart illustrates April temperature patterns in Alterswil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alterswil, April typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (74°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec313639465362646356483833
Data source: Temperature data for Alterswil 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 Alterswil

In Alterswil in April, the precipitation amount is 71 mm (2.8 in) distributed over 11 days.

April Precipitation Trends in Alterswil

The chart displays monthly precipitation patterns in Alterswil, 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 Alterswil, April typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10593114711701431621438711391167
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Alterswil

In Alterswil in April humidity is 84%. With an average temperature of 8°C (46°F), this humidity feels like a chilly mist wrapping around you, making outdoor exploration cumbersome and layering your clothing a necessity for comfort.

April Average Humidity in Alterswil

This chart illustrates the average monthly humidity levels in Alterswil, 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 Alterswil is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%84%80%82%82%77%81%89%89%91%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Alterswil

In Alterswil in April, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Alterswil.

Maximum UV Index Levels in Alterswil for April

The chart shows the monthly maximum UV Index (UVI) for Alterswil 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 Alterswil typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2367810986532
Data source: Alterswil 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 Alterswil Compares to Other Months

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

This table compares monthly weather conditions in Alterswil, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)105 mm (4.1 inches)91%low
February Weather2°C (36°F)93 mm (3.6 inches)89%moderate
March Weather4°C (40°F)114 mm (4.5 inches)87%high
April Weather8°C (46°F)71 mm (2.8 inches)84%high
May Weather11°C (53°F)170 mm (6.7 inches)80%very high
June Weather16°C (62°F)143 mm (5.6 inches)82%very high
July Weather18°C (64°F)162 mm (6.4 inches)82%very high
August Weather17°C (64°F)143 mm (5.6 inches)77%very high
September Weather14°C (57°F)87 mm (3.4 inches)81%high
October Weather9°C (49°F)113 mm (4.4 inches)89%moderate
November Weather4°C (39°F)91 mm (3.6 inches)89%moderate
December Weather1°C (33°F)166 mm (6.6 inches)91%low

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