Last updated: August 27, 2025
May in St. Moritz, Switzerland brings a unique blend of weather that captures the essence of spring in the Alps. Expect maximum temperatures reaching around 18°C (65°F), while average conditions hover near a brisk 3°C (38°F). The month can be chilly with minimum lows dipping to -13°C (8°F), emphasizing the alpine climate's variability. Additionally, the region experiences a significant precipitation total of 150 mm (5.9 in) over the course of 22 rainy days, accompanied by a notable humidity level of 80%. Visitors should be prepared for a cool, wet season, perfect for enjoying the refreshing, lush landscapes that define this picturesque destination.
In St. Moritz, Switzerland, May marks a significant transition as winter fades away and spring emerges. During this month, temperatures begin to warm, with a noticeable increase from the preceding chilly April. The average temperature rises to a comfortable 3°C (38°F), with daytime highs reaching a pleasant 18°C (65°F), inviting outdoor enthusiasts to explore the scenic beauty of the Alps. Although the nights remain crisp with lows around -13°C (8°F), the overall trend underscores a gradual shift towards milder weather, setting the stage for the vibrant summer season ahead. This delightful combination of cool mornings and sunny afternoons makes May an ideal time to experience the majestic landscapes and outdoor activities that St. Moritz has to offer.
May in St. Moritz, Switzerland, marks a notable shift in precipitation patterns, with an impressive 150 mm (5.9 in) of rainfall recorded, making it the wettest month so far this year. This surge in moisture is accompanied by an increase in rainy days, totaling 22, which reflects a blossoming landscape as spring makes its presence felt. Compared to April’s 99 mm (3.9 in) over 12 days, May's precipitation not only highlights a more active weather pattern but also sets the stage for the lush greenery that follows as temperatures warm. The trend of increasing rainfall in the spring months indicates a transition towards the wetter summer season, with May serving as a pivotal bridge between spring’s rejuvenation and summer’s abundance. As the region prepares for the upcoming months, the ample rainfall in May is vital for sustaining the vibrant flora and the overall health of the alpine ecosystem.
In May, St. Moritz enjoys a notable dip in humidity, measuring around 80%. This marks a gradual decline from the higher levels seen in the preceding months, where humidity hovered around 84% in April. While the spring transition brings some relief, conditions remain relatively fresh compared to the summer months ahead. Following May, the humidity slightly creeps up again in June to 82%, emphasizing the town's characteristically variable climate. Such trends highlight the unique balance of crisp alpine air and moisture that the region experiences, making May a delightful time to explore the breathtaking landscapes without feeling overly damp.
As spring approaches in St. Moritz, the UV Index sees a significant rise, peaking at 9 in May, which falls into the very high exposure category. This increase marks a notable trend following the moderate index of 4 in February and escalates through high levels in March and April. With a burn time of just 15 minutes, the need for sun protection becomes critical, as the sun's intensity prepares for the summer months. This pattern of increasing UV exposure highlights the importance of being vigilant about sun safety during sunny outings in the picturesque alpine landscape of St. Moritz. For more detailed information, check the St. Moritz UV Index.
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As spring blossoms into summer, St. Moritz basks in an increasing embrace of daylight, with May emerging as a highlight with 359 hours of sunshine. This radiant month continues the upward trend established since January, where sunshine hours steadily climbed from 179 hours to an impressive 336 hours by April. The delightful ascent culminates in June, which boasts 386 hours under the sun, setting the stage for a brilliant summer. As the days grow longer and warmer, May’s sunlit moments beckon visitors to enjoy the stunning Alpine scenery and outdoor activities that define this enchanting Swiss destination.
In May, St. Moritz, Switzerland, experiences a 28% chance of sunny weather, which reflects a notable decline compared to the sunnier months of March (40%) and April (35%). This dip in sunshine hints at the transition from spring to early summer, where the weather becomes a bit more unpredictable. Interestingly, as summer approaches, June and July maintain a similar 27% chance of sun, suggesting that while May might not be the sunniest month, the following months offer a steady chance for some delightful weather. Ultimately, visitors can expect a mix of sunshine and clouds, making May a charming, albeit somewhat cloudy, time to enjoy the breathtaking alpine scenery.
In St. Moritz, Switzerland, the transition into May marks a significant leap in daylight duration, with the hours of sunshine increasing to a delightful 15 hours. This month stands out as a turning point, following April's 13 hours, and heralds the onset of summer when daylight remains consistent through June and July at the same generous length. As the year progresses into August, the daylight begins to wane slightly to 14 hours, leading to a steady decline through September and October, where it dips to 12 hours and 10 hours respectively. By the year’s end, daylight is a mere 8 hours in December, illustrating the stark contrast in light between the vibrant spring and summer months and the more subdued winter season. This rhythmic dance of daylight not only shapes daily life in St. Moritz but also enhances the beauty of the surrounding landscapes throughout the year.
As May unfolds in St. Moritz, Switzerland, the winds begin to pick up slightly, with an average speed of 1.7 m/s (4 mph). This gentle increase follows a consistent trend established in the preceding months, where wind speeds remain relatively stable at 1.6 m/s during the spring transition from April. The mild breeze not only enhances the serene beauty of the Alpine landscape but also prepares the region for the bustling summer ahead. Notably, the wind speeds during May and June mirror each other, suggesting a calm yet invigorating atmosphere that is perfect for outdoor adventures as the days grow longer and warmer.
Weather in St. Moritz varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in St. Moritz, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present stark contrasts in weather patterns. In May, temperatures range from a minimum of -13°C (8°F) to a comfortable maximum of 18°C (65°F), with an average of 3°C (38°F). This month experiences about 150 mm (5.9 in) of precipitation over approximately 22 days and maintains a humidity level of 80%. In contrast, January is much colder, with temperatures dipping from a frigid minimum of -27°C (-17°F) to a maximum of only 2°C (36°F), averaging -11°C (12°F). Precipitation in January is significantly lower at 75 mm (2.9 in) but falls over just 10 days, coupled with a higher humidity of 92%. For more details on January weather, you can check out St. Moritz weather in January.
May and February present drastically different weather conditions. In February, temperatures are much colder, with a minimum of -28°C (-18°F) and an average of -8°C (18°F), while May sees temperatures rising to a minimum of -13°C (8°F) and averaging 3°C (38°F). Additionally, May experiences more precipitation at 150 mm (5.9 in) over 22 days, compared to February's 59 mm (2.3 in) over just 11 days. Humidity levels are also notably high in both months, with February at 89% and May at 80%. For more detailed insights, you can visit St. Moritz weather in February.
May and March present contrasting weather conditions, showcasing the transition from late winter to early spring. In March, temperatures are significantly colder, with a minimum of -26°C (-14°F) and a maximum reaching only 11°C (52°F). The average temperature hovers around -5°C (23°F), accompanied by higher humidity levels at 87%. Though March experiences less precipitation at 90 mm (3.5 in) over 13 days, the chill in the air remains prevalent.
In contrast, May brings a much milder climate, with temperatures ranging from a minimum of -13°C (8°F) to a maximum of 18°C (65°F), averaging around 3°C (38°F). Despite being warmer, May has a higher level of precipitation at 150 mm (5.9 in) over 22 days, along with a humidity of 80%. This shift in weather signifies the gradual warming as spring progresses, making May feel more inviting compared to the frigid March conditions. For more specifics on March weather, you can visit St. Moritz weather in March.
In comparing the weather between April and May, May shows a noticeable warming trend. The minimum temperature in May is warmer at -13°C (8°F) compared to April's -19°C (-1°F), and the average temperature rises from -1°C (31°F) in April to 3°C (38°F) in May. While April reaches a maximum of 12°C (54°F), May enjoys a more pleasant maximum of 18°C (65°F). However, May also experiences increased precipitation, with 150 mm (5.9 in) spread over 22 days, compared to April's 99 mm (3.9 in) over just 12 days. Humidity levels remain high in both months, slightly decreasing from 84% in April to 80% in May. For a detailed look at April's weather, you can check St. Moritz weather in April.
In comparing the weather of May and June, May typically experiences cooler temperatures, with a minimum of -13°C (8°F) and an average of 3°C (38°F), while June sees a noticeable increase with a minimum of -2°C (28°F) and an average of 9°C (49°F). The maximum temperature in June also rises significantly to 25°C (77°F), compared to May's peak of 18°C (65°F). Precipitation is slightly higher in June, totaling 159 mm (6.3 in) over 19 days, compared to 150 mm (5.9 in) over 22 days in May. Humidity levels are comparable, with May at 80% and June slightly higher at 82%. For more details about June weather, you can check St. Moritz weather in June.
May and July in St. Moritz present quite contrasting weather patterns. In May, temperatures range from a chilly minimum of -13°C (8°F) to a pleasant maximum of 18°C (65°F), with an average temperature of 3°C (38°F). The month is quite wet, featuring 150 mm (5.9 in) of precipitation over 22 days, accompanied by a high humidity of 80%. In contrast, July offers a much warmer climate, with temperatures ranging from 0°C (33°F) to a comfortable maximum of 23°C (73°F), and an average of 10°C (51°F). Despite being the peak of summer, it still sees considerable rainfall with 159 mm (6.3 in) over 21 days, and slightly higher humidity at 83%. For more insights on July weather, you can visit St. Moritz weather in July.
May and August present distinct weather patterns, reflecting the transition from early spring to late summer. In May, temperatures range from a chilly minimum of -13°C (8°F) to a mild maximum of 18°C (65°F), averaging around 3°C (38°F). With 150 mm (5.9 in) of precipitation spread over 22 days, the month is quite damp and cool, with humidity levels consistently at 80%.
In contrast, August shows a warmer climate, with temperatures ranging from a minimum of 0°C (33°F) to a comfortable maximum of 21°C (70°F), averaging 10°C (51°F). While precipitation is slightly higher at 195 mm (7.7 in) over 21 days, the humidity remains steady at 80%, contributing to a more humid feel. For a detailed outlook on August weather, visit St. Moritz weather in August.
May and September exhibit similar maximum temperatures, both peaking at 18°C (65°F). However, May experiences cooler average temperatures, starting at an average of just 3°C (38°F) compared to September’s slightly warmer average of 6°C (44°F). Precipitation levels in May are notably higher, with 150 mm (5.9 in) falling over 22 days, while September sees 126 mm (5.0 in) over 15 days. Humidity is also slightly higher in September at 83%, compared to May's 80%. For more detailed insights on September weather in St. Moritz, visit St. Moritz weather in September.
May and October present distinctly different weather characteristics. In May, temperatures range from a minimum of -13°C (8°F) to a maximum of 18°C (65°F), with an average of 3°C (38°F). This month experiences significant precipitation, totaling 150 mm (5.9 in) over 22 days, accompanied by a relatively high humidity level of 80%. In contrast, October sees slightly milder temperatures, with a minimum of -10°C (14°F), an average of 2°C (36°F), and a maximum of 14°C (57°F). While precipitation is similar, at 148 mm (5.8 in), it falls over fewer days—only 11—resulting in higher humidity at 90%. For more detailed weather information specific to October, you can visit St. Moritz weather in October.
In May, the weather typically ranges from a minimum of -13°C (8°F) to a maximum of 18°C (65°F), with an average temperature of 3°C (38°F). This spring month experiences about 150 mm (5.9 in) of precipitation over 22 days, accompanied by a humidity level of 80%. In contrast, November brings colder conditions, with temperatures ranging from a minimum of -22°C (-8°F) to a maximum of 8°C (47°F), and an average temperature dropping to -4°C (25°F). Although slightly less precipitation is recorded at 132 mm (5.2 in) over 14 days, the humidity rises to 88%, creating a damp chill as winter approaches. For more detailed insights into November's weather, visit St. Moritz weather in November.
In May, temperatures begin to warm up, ranging from a chilly -13°C (8°F) at night to a pleasant 18°C (65°F) during the day, with an average of 3°C (38°F). The month sees approximately 150 mm (5.9 in) of precipitation over 22 days, and the humidity is relatively high at 80%. In contrast, December experiences much colder temperatures, with a minimum of -26°C (-14°F) and a max of just 2°C (37°F), averaging -9°C (16°F). Precipitation decreases slightly to 125 mm (4.9 in) spread over 15 days, while humidity rises to 90%. For those interested in more details about winter conditions, check out St. Moritz weather in December.
May in St. Moritz marks a transition from the lingering chill of winter to the gentle embrace of spring. With an average temperature hovering at a brisk 3°C, the month still experiences notable fluctuations, showcasing occasional highs of up to 18°C—offering a glimpse of the warmer days to come. However, the picturesque landscapes are often accompanied by frequent precipitation, with about 22 days of rain contributing to the region’s lush greenery. As the humidity settles at a comfortable 80%, May stands out for its unpredictable weather, making it a unique time for visitors who revel in the fresh alpine air. For a deeper understanding of the region's overall climate patterns, be sure to explore St. Moritz Climate.