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May Weather in Monthey, Switzerland

Last updated: August 27, 2025

In May, the average temperature in Monthey, Switzerland hovers around 8°C (47°F), with minimums dipping to a chilly -11°C (13°F) and maximums reaching a comfortable 26°C (79°F). Expect 211 mm (8.3 in) of precipitation over approximately 20 days, coupled with an average humidity of 80% that adds to the overall atmosphere of the month.

May Temperature in Monthey

In May in Monthey, the average temperature is 8°C (47°F), with maximums reaching 26°C (79°F) and minimums dipping as low as -11°C (13°F). Be sure to pack layers to accommodate the wide temperature range when traveling during this time.

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

The chart illustrates May temperature patterns in Monthey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monthey, May typically has an average temperature of 8°C (47°F), with highs reaching up to 26°C (79°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec212833414756595851443324
Data source: Temperature data for Monthey 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 Monthey

In Monthey in May, the total precipitation amount is 211 mm (8.3 in) over the course of 20 days.

May Precipitation Trends in Monthey

The chart displays monthly precipitation patterns in Monthey, 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 Monthey, May typically receives around 211 mm (8.3 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec13811514290211211207189120127105228
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Monthey

In Monthey in May, humidity is 80%. With an average temperature of 8°C (47°F), this humidity feels like you're walking through a heavy mist, making your clothes cling to your skin and every step prone to a shiver, which can be quite uncomfortable for traveling.

May Average Humidity in Monthey

This chart illustrates the average monthly humidity levels in Monthey, 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 Monthey is approximately 80%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Monthey

In Monthey 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 Monthey.

Maximum UV Index Levels in Monthey for May

The chart shows the monthly maximum UV Index (UVI) for Monthey 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 Monthey typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2467810997532
Data source: Monthey 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 Monthey Compares to Other Months

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

This table compares monthly weather conditions in Monthey, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)138 mm (5.4 inches)91%low
February Weather-2°C (29°F)115 mm (4.5 inches)89%moderate
March Weather1°C (34°F)142 mm (5.6 inches)87%high
April Weather5°C (41°F)90 mm (3.5 inches)84%high
May Weather8°C (47°F)211 mm (8.3 inches)80%very high
June Weather13°C (56°F)211 mm (8.3 inches)82%very high
July Weather15°C (59°F)206 mm (8.1 inches)82%very high
August Weather14°C (58°F)189 mm (7.4 inches)77%very high
September Weather11°C (52°F)120 mm (4.7 inches)81%high
October Weather7°C (44°F)127 mm (5.0 inches)89%moderate
November Weather1°C (33°F)105 mm (4.1 inches)89%moderate
December Weather-4°C (24°F)228 mm (9.0 inches)91%low

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