Last updated: August 27, 2025
Nestled in the heart of Switzerland, Biel/Bienne experiences a dynamic May climate characterized by temperatures ranging from -1°C (30°F) at night to a delightful maximum of 29°C (85°F) during the day. This month serves as a transition into summer, with an average temperature of 13°C (55°F) fostering a pleasant outdoor atmosphere. However, the region also sees considerable rainfall, accumulating 156 mm (6.1 in) over 18 days, which contributes to the lush landscapes. With a humidity level of 80%, May in Biel/Bienne paints a rich tapestry of spring’s beauty, making it an invigorating time to experience nature's awakening.
In Biel/Bienne, Switzerland, May marks a delightful transition into warmer days, showcasing a significant rise in temperatures. With a minimum of -1°C (30°F) and an average that climbs to 13°C (55°F), the month signals the onset of spring's embrace. Afternoon highs can reach a pleasant 29°C (85°F), inviting locals and visitors alike to enjoy the blossoming landscape. This pattern reflects a steady upward trend from the preceding months, where temperatures gradually ascend from winter's chill. As May unfolds, the vibrant colors of nature awaken, and the city's charm becomes even more alluring, making it an ideal time for outdoor activities and exploration.
May in Biel/Bienne, Switzerland, marks a significant uptick in precipitation, with an impressive 156 mm (6.1 in) spread over 18 days. This surge in rainfall not only makes May the wettest month of the year but also signals the transition into the lushness of late spring. Following a relatively drier April, the increased precipitation as temperatures rise contributes to vibrant flora in the region. Notably, this pattern of intensifying moisture persists into June and July, hinting at a trend where May effectively sets the stage for the wetter months ahead. Overall, the substantial rainfall in May enriches the landscape, enhancing the scenic beauty that Biel/Bienne is renowned for.
In Biel/Bienne, Switzerland, the month of May marks a slight transition towards drier conditions, with humidity levels averaging 80%. This dip from the higher winter averages—where January and February peak at 91% and 89%—signals the arrival of spring's warmth. As the year progresses, humidity levels gradually decrease, reaching their lowest in August at 77%. However, as autumn approaches, there's a noticeable rise again, with levels returning to 89% by October. Overall, May stands out in this rhythm, offering a refreshing balance before the humidity levels start to climb again, hinting at the cyclical nature of the region's weather.
As spring transitions into summer, Biel/Bienne experiences a significant surge in ultraviolet (UV) radiation. In May, the UV Index reaches a peak of 8, classifying it as very high. This alarming increase means that residents and visitors alike should take precautions, as the burn time drops dramatically to just 15 minutes. This trend marks a sharp contrast to the earlier months of the year, where the UV Index was in the lower ranges, peaking at a modest 6 in April. Since May kicks off a period of heightened sun exposure—with June and July reaching even higher indices—understanding and monitoring the UV Index is crucial for skin protection and safe outdoor activities. For more information on UV levels throughout the year, visit Biel/Bienne UV Index.
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As spring transitions to summer in Biel/Bienne, Switzerland, May shines brightly with 370 hours of sunshine, marking a delightful peak in light after a gradual increase throughout the months. Starting from a mere 159 hours in January, the sunshine gradually climbs, showcasing a clear upward trend as the year unfolds. By April, the total escalates to 358 hours, setting the stage for May's splendid warmth. This month not only surpasses the previous months but also foreshadows the sunny days of June, which leads with 394 hours. The patterns highlight the beauty of Biel/Bienne's seasonality, where each month builds on the last, inviting residents and visitors alike to bask in the growing sunshine.
In Biel/Bienne, Switzerland, the onset of May brings a notable shift in weather patterns, but the chances of sun may not be as promising as one would hope, settling at 32%. While this month enjoys a modest increase from the earlier spring months, it contrasts with April’s more favorable 51% sunshine likelihood. As we move into the warmer months, sunny days do become more frequent, with June, July, and August hovering around 31-38%, suggesting a gradual transition towards summer's sunny embrace. Consequently, while May offers a blend of blooming landscapes and fluctuating weather, it remains a time of anticipation for more consistent sunshine in the following summer months.
As spring blossoms into summer in Biel/Bienne, the daylight duration undergoes a remarkable transformation. Starting in January with a modest 8 hours of daylight, the days gradually lengthen, offering 10 hours by February and 11 hours in March. The arrival of April ushers in a noticeable surge, reaching 13 hours. By May, the trend peaks at a delightful 15 hours of sunlight, a duration that remains consistent through June and July. Even as August approaches, the sun still graces the region with 14 hours of daylight, before a gentle tapering begins in September. With 12 hours of light in fall, the days continue to shorten, ultimately returning to 10 hours in October and settling back to the winter minimum of 8 hours by December. This rhythmic cycle of daylight not only highlights the beauty of seasonal change but also enhances the vibrant outdoor life in Biel/Bienne throughout the spring and summer months.
In May, the winds in Biel/Bienne begin to pick up, reaching an average speed of 2.8 m/s (6 mph), making it one of the breezier months of the year. This light increase from the calmer spring months—January through April, which hover around 2.4 m/s (5 mph)—signals a gentle transition into summer. The winds during this time tend to create a refreshing atmosphere, perfect for outdoor activities as residents and visitors alike bask in the mild weather. Following May, wind speeds take a noticeable dip in June, dropping to an average of 1.7 m/s (4 mph), highlighting a seasonal trend where the early summer months are generally more tranquil. Thus, May stands out as a pleasant period where cool breezes invite exploration of Biel/Bienne's scenic landscapes.
Weather in Biel/Bienne varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Biel/Bienne, focusing on differences in temperature, rainfall, humidity, and UV levels.
May and January present strikingly different weather conditions. In May, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 29°C (85°F), with an average of 13°C (55°F). This month also sees significant rainfall, accumulating 156 mm (6.1 in) over approximately 18 days, coupled with a humidity level of 80%. In contrast, January experiences much colder temperatures, with a minimum of -14°C (8°F) and an average of just 1°C (33°F), peaking at 15°C (59°F). Precipitation is lower than in May, at 98 mm (3.9 in) over 13 days, but with higher humidity levels of 91%. The stark contrast between the mild, rainy May and the cold, potentially snowy January is evident, highlighting the seasonal shifts in this region. For more details on January weather, check out Biel/Bienne weather in January.
May's weather is significantly warmer and more variable compared to February. With an average temperature of 13°C (55°F) and max temperatures reaching 29°C (85°F), May welcomes much milder conditions, whereas February averages only 3°C (38°F) with a maximum of 17°C (64°F). Precipitation in May also exceeds that of February, totaling 156 mm (6.1 in) over 18 days, compared to February's 84 mm (3.3 in) over 12 days. Additionally, while both months experience high humidity, February is slightly more humid at 89% compared to May's 80%. For more details on February weather, you can check Biel/Bienne weather in February.
In comparing the weather between March and May, May presents significantly milder temperatures, with an average of 13°C (55°F) compared to March's average of just 5°C (42°F). March experiences colder nights, with minimum temperatures plunging to -13°C (9°F), while May's lowest temperature hovers around -1°C (30°F). Precipitation is more abundant in May, totaling 156 mm (6.1 in) over 18 days, compared to March's 100 mm (3.9 in) across 16 days. Despite slightly lower humidity in May at 80% versus March's 87%, both months showcase variable weather patterns. For detailed insights on March weather, you can refer to Biel/Bienne weather in March.
Comparing the weather in April and May reveals some notable differences. May experiences a broader temperature range, with minimums around -1°C (30°F) and maximums soaring to 29°C (85°F), leading to a pleasant average of 13°C (55°F). In contrast, April has cooler temperatures, with minimums dropping to -5°C (23°F) and maximums reaching only 25°C (77°F), resulting in an average of 9°C (49°F). Precipitation is significantly higher in May, with 156 mm (6.1 in) over 18 days, compared to April's 67 mm (2.6 in) over 11 days. Despite May's warmer temperatures, April has slightly higher humidity at 84%, compared to 80% in May. For more details on April's weather, you can check Biel/Bienne weather in April.
May and June display a noticeable transition in weather patterns. In May, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 29°C (85°F), with an average of 13°C (55°F). The month is characterized by considerable precipitation, totaling 156 mm (6.1 in) over 18 days, and a humidity level of 80%. Conversely, June sees significantly warmer temperatures, with a minimum of 5°C (41°F) and a maximum of 33°C (92°F), averaging 18°C (64°F). While precipitation decreases slightly to 141 mm (5.6 in) over 17 days, humidity rises to 82%. This shift indicates a move toward warmer, more humid conditions as spring gives way to summer. For more details about June weather, visit Biel/Bienne weather in June.
In May, the weather varies significantly, with temperatures ranging from a chilly -1°C (30°F) at night to a warm 29°C (85°F) during the day, resulting in an average of 13°C (55°F). This month is characterized by considerable precipitation, totaling 156 mm (6.1 in) over 18 days, and maintaining a high humidity level of 80%.
In contrast, July sees a warmer climate, with nighttime lows at 8°C (46°F) and daytime highs reaching up to 35°C (95°F), leading to an average temperature of 19°C (67°F). Although the precipitation is slightly lower at 150 mm (5.9 in) over 15 days, the humidity remains relatively high at 82%. For more detailed information about July weather, you can visit Biel/Bienne weather in July.
Overall, while May experiences cooler temperatures and more significant rainfall, July brings a warmer atmosphere with slightly less precipitation.
May and August present distinct differences in weather patterns. In May, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 29°C (85°F), with an average temperature of 13°C (55°F). The month sees considerable precipitation, totaling 156 mm (6.1 in) over 18 days, accompanied by high humidity levels at 80%. In contrast, August offers a milder climate with temperatures starting at a minimum of 6°C (44°F), peaking at a maximum of 33°C (92°F) and averaging around 19°C (66°F). Precipitation is slightly less, at 152 mm (6.0 in) over 16 days, while humidity is marginally lower at 77%. For more insights on the weather in August, check out this link: Biel/Bienne weather in August.
May and September offer distinct weather experiences, though both months can feature warm days. May sees temperatures ranging from a chilly minimum of -1°C (30°F) to a comfortable maximum of 29°C (85°F), with an average temperature of 13°C (55°F). In contrast, September starts off slightly warmer on average, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), averaging around 15°C (59°F). Precipitation is more abundant in May, receiving 156 mm (6.1 in) over 18 days, compared to September’s 82 mm (3.2 in) across 12 days. Humidity levels are similar, with May at 80% and September at 81%. For more detailed information on September weather, you can visit Biel/Bienne weather in September.
In May, temperatures typically range from a chilly minimum of -1°C (30°F) to a warm maximum of 29°C (85°F), with an average of 13°C (55°F). The month sees considerable precipitation, totaling 156 mm (6.1 in) over 18 days, with humidity at a moderate 80%. In contrast, October experiences cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 23°C (73°F), averaging 10°C (50°F). Precipitation in October is less frequent, amounting to 104 mm (4.1 in) over 13 days, and humidity increases to 89%. For more details about the climate during this month, you can refer to the link: Biel/Bienne weather in October.
May and November present contrasting weather patterns. In May, temperatures range from a chilly minimum of -1°C (30°F) to a warm maximum of 29°C (85°F), with an average of 13°C (55°F). The month experiences substantial rainfall, totaling 156 mm (6.1 in) over 18 days, and humidity levels hover around 80%. In stark comparison, November sees cooler temperatures with a minimum of -4°C (25°F) and an average of 4°C (40°F), reaching a maximum of 20°C (68°F). Precipitation is significantly lower at 84 mm (3.3 in) spread over 13 days, and it has a higher humidity of 89%. For more detailed insights, you can explore Biel/Bienne weather in November.
May and December present distinctly different weather patterns. In May, temperatures range from a low of -1°C (30°F) to a comfortable high of 29°C (85°F), with an average of 13°C (55°F). The month experiences considerable precipitation, totaling 156 mm (6.1 in) across 18 days, coupled with a humidity level of 80%. In contrast, December is much colder, with temperatures dipping to a minimum of -8°C (18°F) and peaking at 13°C (56°F), averaging only 2°C (36°F). The month sees slightly less precipitation at 138 mm (5.4 in) over 19 days, along with higher humidity at 91%. For more specific details about December weather, you can visit Biel/Bienne weather in December.
As May arrives in Biel/Bienne, the weather begins to embrace the warmth and vibrancy of spring. Compared to other months, May showcases a noticeable shift from the chill of winter and the briskness of early spring. With average temperatures rising and a hint of summer's approach, the days are both milder and sunnier, offering a delightful respite. However, this transition is accompanied by increased humidity and frequent rainfall, with about half the month experiencing precipitation. These unique weather patterns make May a fascinating time in Biel/Bienne, where emerging blooms and greenery contrast beautifully with the occasional shower. For more insights on weather trends, explore the Biel/Bienne Climate.