May Weather in Onex, Switzerland

Last updated: August 27, 2025

In May, the average temperature in Onex, Switzerland hovers around 13°C (56°F), with a minimum dipping to -1°C (31°F) and a maximum reaching 29°C (84°F). Expect 174 mm (6.8 in) of precipitation spread over approximately 16 days, contributing to a notably high average humidity of 80%.

May Temperature in Onex

In May in Onex, the average temperature is 13°C (56°F), with maximums reaching up to 29°C (84°F) and minimums dropping as low as -1°C (31°F). This varied climate makes Onex an ideal destination for travelers seeking a mix of mild and warm weather.

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

The chart illustrates May temperature patterns in Onex, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onex, May typically has an average temperature of 13°C (56°F), with highs reaching up to 29°C (84°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Onex generated using information from the Copernicus Climate Change Service.

May Precipitation in Onex

In Onex in May, the precipitation amount is 174 mm (6.8 in) over the course of 16 days.

May Precipitation Trends in Onex

The chart displays monthly precipitation patterns in Onex, 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 Onex, May typically receives around 174 mm (6.8 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Onex

In Onex in May humidity is 80%. With average temperature 13°C (56°F) this humidity feels like a damp chill that seeps into your bones, making outdoor exploration more challenging and necessitating layered clothing for comfort.

May Average Humidity in Onex

This chart illustrates the average monthly humidity levels in Onex, 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 Onex is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Onex

In Onex 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 Onex.

Maximum UV Index Levels in Onex for May

The chart shows the monthly maximum UV Index (UVI) for Onex 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 Onex typically reaches 8, which falls under the very high exposure category.

Data source: Onex 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 Onex Compares to Other Months

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

This table compares monthly weather conditions in Onex, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (35°F)	128 mm (5.0 inches)	91%	low
February Weather	4°C (40°F)	101 mm (4.0 inches)	89%	moderate
March Weather	6°C (44°F)	151 mm (5.9 inches)	87%	high
April Weather	10°C (50°F)	64 mm (2.5 inches)	84%	high
May Weather	13°C (56°F)	174 mm (6.8 inches)	80%	very high
June Weather	18°C (64°F)	130 mm (5.1 inches)	82%	very high
July Weather	19°C (67°F)	117 mm (4.6 inches)	82%	very high
August Weather	19°C (67°F)	119 mm (4.7 inches)	77%	very high
September Weather	15°C (60°F)	83 mm (3.3 inches)	81%	high
October Weather	11°C (51°F)	126 mm (5.0 inches)	89%	moderate
November Weather	5°C (42°F)	121 mm (4.7 inches)	89%	moderate
December Weather	3°C (37°F)	224 mm (8.8 inches)	91%	low