May Weather in Rapperswil, Switzerland

Last updated: August 27, 2025

In Rapperswil, Switzerland, May presents a unique blend of weather experiences, with temperatures ranging from a brisk -5°C (24°F) to a warm 28°C (84°F). The month boasts an average temperature of 12°C (53°F), making it a transitional period from chilly spring to warmer days. However, residents should prepare for a wet month, as 159 mm (6.3 in) of precipitation falls over 20 days, contributing to an average humidity of 80%. This combination of temperature fluctuations and significant rainfall creates a vibrant, albeit damp, atmosphere ideal for enjoying the lush landscapes of Rapperswil.

May Temperature in Rapperswil

May in Rapperswil, Switzerland marks a delightful transition into warmer weather, showcasing a significant rise in temperatures. With minimums hovering around -5°C (24°F) and average highs reaching 28°C (84°F), this month signals the arrival of spring's full bloom. The average temperature of 12°C (53°F) indicates a steady improvement from the cooler months of January through April, where temperatures barely crossed the freezing point. As nature awakens, it’s the ideal time for outdoor activities and enjoying the picturesque scenery, as the milder climate encourages both locals and visitors to embrace the beauty of this charming Swiss town.

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

The chart illustrates May temperature patterns in Rapperswil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rapperswil, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec323640475362656457494035
Data source: Temperature data for Rapperswil 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 Rapperswil

May in Rapperswil, Switzerland, marks a notable increase in precipitation, as the region experiences 159 mm (6.3 in) of rain over 20 days, making it one of the wettest months of the year. This substantial rainfall sets the stage for the lush greenery that blankets the landscape as spring progresses. Following a relatively drier April with just 87 mm (3.4 in), May not only introduces more rain but also signifies a shift towards the wetter summer months ahead. As temperatures rise and flowers bloom, the increased precipitation serves to nourish the vibrant environment, demonstrating how May acts as a pivotal bridge between the cooler, drier spring and the forthcoming summer rains. With the rainfall gradually intensifying, it’s clear that May plays a vital role in shaping Rapperswil’s seasonal climate dynamics.

May Precipitation Trends in Rapperswil

The chart displays monthly precipitation patterns in Rapperswil, 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 Rapperswil, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec127951128715918714515812412880155
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Rapperswil

As spring transitions into summer, May in Rapperswil experiences a noticeable drop in humidity, settling at 80%. This marks a gradual decline from the wetter months of early spring, where humidity levels hovered around 84% in April and even higher in the preceding months, peaking at 92% in January. The trend of decreasing humidity continues into June, when levels slightly rise to 82%, suggesting a hint of summer warmth ahead while still retaining the freshness characteristic of the region. As May unfolds, residents and visitors can enjoy a balanced atmosphere, melding the crispness of spring with the emerging warmth of summer.

May Average Humidity in Rapperswil

This chart illustrates the average monthly humidity levels in Rapperswil, 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 Rapperswil is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Rapperswil

As spring transitions into summer in Rapperswil, Switzerland, the UV Index takes a notable leap, particularly in May, where it reaches 8, categorizing the exposure as very high. This signifies a significant increase from the earlier months, with burn times shrinking to just 15 minutes. Notably, while January through April showcased a gradual rise in UV levels, May marks a tipping point, prompting residents to prioritize sun safety with increased awareness and protection measures. As a comparison, the following month of June escalates even further with a UV Index of 10, making it crucial for sun enthusiasts to stay vigilant. With these rising values, understanding the UV Index trends is essential for enjoying the sun responsibly – explore more details at Rapperswil UV Index.

Maximum UV Index Levels in Rapperswil for May

The chart shows the monthly maximum UV Index (UVI) for Rapperswil 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 Rapperswil typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2357810986432
Data source: Rapperswil 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.

May Sunshine in Rapperswil

As spring transitions into summer, Rapperswil basks in the glory of increasing sunshine hours, reaching a delightful peak in May with a full 365 hours of radiant daylight. This month marks a significant jump from the earlier months, where sunlight begins to break free from winter's grasp: January starts with a mere 163 hours, gradually climbing each month to create a warm and inviting atmosphere. April, a precursor to the summer bliss, offers 355 hours, setting the stage for May's resplendent sunshine. Following this vibrant month, June and July continue the trend, boasting even more hours of sunshine before a slight decline in August. The consistent increase through the spring and early summer months not only brightens the days but also heralds the joys of outdoor activities for residents and visitors alike.

Monthly Sunshine Duration in Rapperswil: May Highlighted

The May sunshine duration represents the total number of hours Rapperswil experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec163h227h299h355h365h382h410h377h314h275h211h183h
Data source: Rapperswil May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Rapperswil During May

As May arrives in Rapperswil, Switzerland, the likelihood of sunny weather presents an intriguing shift in the annual pattern. With a 33% chance of sunshine, May sees a dip from the steadily increasing percentages of March (44%) and April (47%). This decrease hints at a transitional period, where the promise of warmer weather begins yet is still subject to the variability typical of spring. In comparison, the surrounding months of April and June both boast slightly higher chances of sun at 47% and 32%, respectively, indicating that while May may offer some sunny days, it often introduces a blend of showers and sun as the region prepares for the vibrant summer ahead.

Percentage of Sunny Days in May in Rapperswil

The chart illustrates the percentage of sunny days in Rapperswil throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Rapperswil experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec17%38%44%47%33%32%34%37%43%41%29%36%
Data source: Rapperswil May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Rapperswil in May

As spring transitions into summer, Rapperswil, Switzerland experiences a marked increase in daylight duration, shining brightly during the month of May with an impressive 15 hours of daylight. This surge from 13 hours in April reflects the region's gradual emergence from winter's long nights. Following May, daylight remains consistent through June and July, allowing residents to revel in the extended hours of sunshine. As summer wanes into autumn, the daylight gradually diminishes, dropping to 12 hours in September before further tapering off through the chill of autumn. Overall, May serves as a vibrant peak in Rapperswil’s yearly cycle of light, setting the stage for outdoor activities and longer evenings filled with warmth and light.

Average Daylight Hours in Rapperswil for May

The chart illustrates the variation in daylight duration in Rapperswil throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 56m10h 16m11h 56m13h 38m15h 6m15h 52m15h 28m14h 9m12h 30m10h 48m9h 18m8h 31m
Data source: Rapperswil daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Rapperswil

In May, Rapperswil experiences a gentle breeze, with average wind speeds rising to 2.2 m/s (5 mph). This marks a slight increase from the preceding months, where wind speeds hovered around 1.8 to 1.9 m/s (4 mph) from January through April. The arrival of spring brings a refreshing shift, signaling the transition towards warmer months. Notably, as the year progresses, the winds tend to calm down again, decreasing to 1.5 m/s (3 mph) by June. This pattern highlights May as a delightful period where the gentle winds complement the blooming landscapes, making it an ideal time for outdoor activities and enjoying the scenic vistas of this picturesque Swiss town.

Average May Wind Speed in Rapperswil

The chart displays monthly wind speed patterns in Rapperswil, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.01.91.81.92.2 m/s1.51.61.51.51.61.61.9
Data source: Rapperswil May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Rapperswil Compares to Other Months

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

May and January present contrasting weather patterns. In May, temperatures range from a minimum of -5°C (24°F) to a maximum of 28°C (84°F), with an average of 12°C (53°F). The month sees significant precipitation, totaling 159 mm (6.3 in) over about 20 days, accompanied by a humidity level of 80%. In contrast, January is much colder, with temperatures ranging from -12°C (10°F) to 13°C (56°F) and an average of 0°C (32°F). Although January experiences slightly less precipitation at 127 mm (5.0 in) over 12 days, it is characterized by higher humidity levels of 92%. For a more detailed look at January weather, you can visit Rapperswil weather in January.

May and February showcase distinct differences in weather patterns. In May, temperatures range from a chilly minimum of -5°C (24°F) to a warm maximum of 28°C (84°F), with an average of 12°C (53°F). This month also sees significant precipitation, totaling 159 mm (6.3 in) over 20 days, and maintains a humidity level of 80%. Conversely, February is considerably colder, with temperatures ranging from a low of -15°C (6°F) to a high of 17°C (62°F) and an average of only 2°C (36°F). Precipitation is lighter, at 95 mm (3.7 in) spread over 12 days, while humidity peaks slightly at 89%. For more information on February weather specifics, check out Rapperswil weather in February.

The weather in May is notably milder compared to March, with average temperatures ranging from a minimum of -5°C (24°F) to a maximum of 28°C (84°F), while March features a colder range of -16°C (4°F) to 19°C (67°F). Additionally, May experiences more precipitation, with a total of 159 mm (6.3 in) over about 20 days, compared to March's 112 mm (4.4 in) over 17 days. Humidity remains fairly high in both months, at 80% in May and 87% in March, but the overall climate in May feels much more temperate and inviting. For a deeper look into March's weather specifics, visit Rapperswil weather in March.

In comparing the weather between April and May, May typically experiences milder temperatures, with average highs reaching up to 28°C (84°F) compared to April's maximum of 24°C (76°F). While both months can have chilly nights, May's minimum temperature of -5°C (24°F) is slightly warmer than April's -7°C (19°F). Additionally, May tends to be wetter, accumulating 159 mm (6.3 in) of precipitation over 20 days, in contrast to April's 87 mm (3.4 in) over 12 days. Humidity remains relatively high in both months, with May at 80% and April at 84%. For more detailed insights into April's weather patterns, you can visit Rapperswil weather in April.

In comparing the weather of May and June, we can observe notable differences in both temperature and precipitation. May experiences a wider temperature range, with a minimum of -5°C (24°F) and a warmer maximum reaching 28°C (84°F), while June's temperatures are generally milder, ranging from a minimum of 4°C (40°F) to a maximum of 32°C (90°F). However, June tends to be slightly wetter, with 187 mm (7.4 in) of precipitation over 17 days compared to May’s 159 mm (6.3 in) over 20 days. Humidity levels are also comparable, with May at 80% and June slightly higher at 82%. For a more detailed look at June weather patterns, check out Rapperswil weather in June.

May and July exhibit notable differences in weather patterns. In May, temperatures can range from a chilly -5°C (24°F) at the lowest to a warm 28°C (84°F) at the peak, with an average of 12°C (53°F). The month sees considerable precipitation at 159 mm (6.3 in) over 20 days, accompanied by high humidity levels at 80%. In contrast, July experiences milder lows of 8°C (47°F) and warmer highs reaching 33°C (91°F), with the average temperature climbing to 18°C (65°F). While July has slightly less rainfall at 145 mm (5.7 in) spread over 16 days, humidity remains relatively high at 83%. For a detailed look at the July weather, you can visit Rapperswil weather in July.

May and August present distinct weather characteristics despite their proximity in the calendar year. In May, temperatures can fluctuate significantly, with minimums dipping as low as -5°C (24°F) and reaching an average of 12°C (53°F), peaking at 28°C (84°F). This month experiences considerable precipitation, averaging 159 mm (6.3 in) over about 20 days, accompanied by high humidity levels of 80%.

In contrast, August offers milder weather, with minimum temperatures starting at 8°C (46°F) and averaging 18°C (65°F), while maximums can soar to 32°C (90°F). The precipitation in August is slightly lower at 158 mm (6.2 in), spread over about 15 days, but it maintains the same high humidity of 80%. For more details on August weather, visit Rapperswil weather in August.

May and September present a transition in weather patterns, showcasing distinct temperature ranges and precipitation levels. In May, temperatures can dip as low as -5°C (24°F) and peak at 28°C (84°F), with an average temperature of 12°C (53°F). This month also experiences considerable rainfall, totaling 159 mm (6.3 in) over approximately 20 days, alongside a humidity level of 80%. In contrast, September's temperatures are generally milder, with minimums around 2°C (36°F) and maximums reaching 27°C (80°F), averaging at 14°C (57°F). Rainfall is less frequent, accumulating to about 123 mm (4.9 in) over 14 days, and humidity slightly increases to 83%. For more detailed insights about September weather, you can check Rapperswil weather in September.

In May, the weather typically features a wider temperature range, with minimums dipping to -5°C (24°F) and maximums reaching up to 28°C (84°F), resulting in an average temperature of 12°C (53°F). This month also experiences considerable precipitation, totaling 159 mm (6.3 in) over approximately 20 days, and humidity levels around 80%.

In contrast, October presents milder conditions, with minimum temperatures at 0°C (32°F) and maximums of 22°C (72°F), leading to a cooler average of 10°C (50°F). The rainfall is less intense at 128 mm (5.0 in) across about 13 days, and humidity rises slightly to 90%. For more details, you can check the Rapperswil weather in October.

In comparing the weather between May and November, there is a notable shift in temperature and precipitation patterns. May experiences a broader temperature range with minimums of -5°C (24°F) and maximums reaching 28°C (84°F), resulting in an average temperature of 12°C (53°F). In contrast, November's temperatures are generally cooler, with maximums capped at 20°C (69°F) and an average of just 4°C (40°F). While both months see some rainfall, May receives significantly more precipitation at 159 mm (6.3 in) over 20 days, compared to November's 80 mm (3.1 in) over 13 days. Humidity levels are also higher in November, averaging 88%, compared to May's 80%. For more details on November conditions, you can check Rapperswil weather in November.

May and December present notably different weather patterns. In May, temperatures can range from a chilly -5°C (24°F) at night to a warm 28°C (84°F) during the day, with an average temperature of 12°C (53°F). The month experiences significant precipitation, with about 159 mm (6.3 in) falling over 20 days, contributing to a humidity level of 80%. In contrast, December sees colder temperatures, with nighttime lows of -10°C (14°F) and daytime highs reaching only up to 12°C (54°F), averaging just 2°C (35°F). Although the precipitation is slightly lower at 155 mm (6.1 in) over 19 days, the humidity is higher at 90%. For more specific details about December weather, check out Rapperswil weather in December.

Compare Rapperswil's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Rapperswil

As spring unfolds in Rapperswil, May weather brings a delightful blend of warmth and renewal, standing out distinctly from the chill of earlier months. With maximum temperatures reaching a comfortable 28°C, the transition to milder conditions is palpable, inviting outdoor activities amidst blooming landscapes. However, the average temperature hovers around a cool 12°C, reminding us that spring can still be fickle, with occasional chilly days. The month is also characterized by significant rainfall, totaling 159 mm across about 20 days, contributing to the lush greenery that defines this beautiful locale. Humidity levels maintain a steady 80%, enhancing the vibrant scents of blossoming flora. For a deeper look into how May compares to other months, explore Rapperswil Climate.