May Weather in Olten, Switzerland

Last updated: August 27, 2025

In May, the average temperature in Olten, Switzerland is a comfortable 13°C (56°F), though temperatures can dip as low as -1°C (31°F) or rise to a sweltering 30°C (86°F). Expect about 150 mm (5.9 in) of precipitation spread over 18 days, and prepare for a humid backdrop with an average humidity level of 80%.

May Temperature in Olten

In May in Olten, the average temperature is 13°C (56°F). Maximum temperatures can reach 30°C (86°F), while minimums can drop as low as -1°C (31°F). Be prepared for a wide range of temperatures during your travels.

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

The chart illustrates May temperature patterns in Olten, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Olten, May typically has an average temperature of 13°C (56°F), with highs reaching up to 30°C (86°F) and lows dropping to around -1°C (31°F).

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

May Precipitation in Olten

In Olten in May, the precipitation amount is 150 mm (5.9 in) over the course of 18 days.

May Precipitation Trends in Olten

The chart displays monthly precipitation patterns in Olten, 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 Olten, May typically receives around 150 mm (5.9 inches) of precipitation spread over approximately 18 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 Olten

In Olten 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 Olten

This chart illustrates the average monthly humidity levels in Olten, 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 Olten 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 Olten

In Olten 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 Olten.

Maximum UV Index Levels in Olten for May

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

Data source: Olten 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 Olten Compares to Other Months

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

This table compares monthly weather conditions in Olten, 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 (34°F)	99 mm (3.9 inches)	92%	low
February Weather	3°C (38°F)	85 mm (3.3 inches)	89%	moderate
March Weather	6°C (43°F)	100 mm (4.0 inches)	87%	moderate
April Weather	10°C (50°F)	73 mm (2.9 inches)	84%	high
May Weather	13°C (56°F)	150 mm (5.9 inches)	80%	very high
June Weather	18°C (65°F)	142 mm (5.6 inches)	82%	very high
July Weather	19°C (67°F)	165 mm (6.5 inches)	83%	very high
August Weather	19°C (66°F)	158 mm (6.2 inches)	80%	very high
September Weather	15°C (59°F)	91 mm (3.6 inches)	83%	high
October Weather	10°C (51°F)	109 mm (4.3 inches)	90%	moderate
November Weather	5°C (41°F)	72 mm (2.8 inches)	88%	low
December Weather	2°C (37°F)	133 mm (5.2 inches)	90%	low