Last updated: August 27, 2025
May in Basel, Switzerland offers a delightful blend of spring warmth and vibrant colors. With maximum temperatures reaching up to 30°C (87°F), the month encourages outdoor adventures, while the average temperature hovers around a mild 13°C (56°F). Visitors and locals alike might occasionally experience cooler nights, with temperatures dipping to a minimum of 0°C (32°F). However, with precipitation amounting to 133 mm (5.2 in) and rain occurring on 17 days, it’s wise to carry an umbrella. The humidity levels at 80% can make the air feel a bit heavy, yet the refreshing ambiance and blooming landscapes make it a wonderful time to explore this charming city.
May in Basel, Switzerland marks a stunning transition into the warmth of spring, with temperatures showcasing a significant upward trend. The month begins with a minimum of 0°C (32°F), but quickly warms to an average of 13°C (56°F), peaking at a delightful 30°C (87°F). This rise in temperature is a stark contrast to the chill of winter months, where January and February register min temperatures below -13°C (8°F). By May, the vibrancy of blooming nature becomes palpable, as residents and visitors alike bask in the milder weather that invites outdoor activities and exploration. This shift signals the joyous arrival of summer, making May an ideal time to experience all that Basel has to offer in its stunning landscapes and rich culture.
May in Basel, Switzerland, marks a significant uptick in precipitation, with the city receiving 133 mm (5.2 in)—the highest for any month thus far. This 17-day stretch of rain sets the tone for a lush early summer, as spring blossoms and greenery thrive under the nourishing downpours. In comparison to April's 62 mm (2.4 in) over 10 days, May’s wetness emphasizes a seasonal transition into a wetter climate. The trend shows an increasing frequency of rainfall during this month, supporting the vibrant blooming of flowers and the replenishment of local waterways. The heavier rains in May not only enhance the beauty of Basel but also lay the groundwork for the following months, where June continues with another substantial 125 mm of rain.
In Basel, Switzerland, May marks a notable transition in humidity levels, dipping to 80% after the wetter winter months. This decline reflects a seasonal trend where humidity gradually decreases from the frigid January peak of 91%. From the moist depths of winter through spring, humidity steadily lessens, reaching its lowest point of the season in May before slightly rising again in June. This pattern indicates an inviting shift in the atmosphere, as the air becomes more breathable and pleasant, setting the stage for late spring outdoor activities amid a backdrop of blossoming nature. As the months progress into summer, levels stabilize around 82%, highlighting a generally comfortable climate for residents and visitors alike.
As spring blooms into summer in Basel, the UV Index ramps up significantly. In May, the UV Index soars to 8, marking the beginning of a very high exposure category, with a quick burn time of just 15 minutes. This increase is a notable shift from the previous months, where exposure was classified as moderate to high. As the sun's intensity rises, residents and visitors alike should be mindful of protecting their skin, especially when transitioning from April's UV Index of 6. With June and July still at 9, ensuring proper sun safety becomes crucial. For more insights on UV levels throughout the year, check out the Basel UV Index.
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As spring unfolds in Basel, Switzerland, May shines brightly with an impressive 361 hours of sunshine, marking a delightful peak in the region’s gradual transition to summer. Following a steady upward trend from January’s 136 hours, the months of March and April witness a lively jump as sunlight stretches its reach, culminating in May's radiant days. This month not only showcases an increase over April but is also a precursor to June's sun-drenched 389 hours, highlighting the region's trajectory toward the sunniest months. The escalating daylight invites both locals and visitors to bask in outdoor activities, making May a truly vibrant time in Basel.
In Basel, Switzerland, May presents a mixed bag when it comes to sunny weather, with a 33% chance of sunshine. This marks a notable dip compared to the preceding months of March and April, where the likelihood of sun peaks at 47% and 52%, respectively. Interestingly, as spring transitions into summer, the chances of sunny days in June and July follow a slightly downward trend, dropping to 32% and 38%. This suggests that while May is still a part of the sunny season’s unfolding, it might not deliver the full warmth and brightness one might expect. The weather in May behaves rather unpredictably, bridging the gap between the vibrant sun of late spring and the cloudier days of early summer. So, it’s best to enjoy the occasional sunny moments while staying prepared for those surprise showers!
As the seasons shift in Basel, May shines brightly with a delightful 15 hours of daylight, marking a peak in light as spring fully unfolds. This month welcomes an increase from April's 13 hours, signaling the transition into summer, where extended daylight hours continue, peaking at 15 hours in both June and July. As the year progresses, daylight begins to gradually wane, dropping to 14 hours in August and further declining through the autumn months. This rhythmic variation not only enriches daily life but also enhances the city's vibrant outdoor culture, inviting residents and visitors alike to bask in the longer, sunlit days of May and beyond.
In May, Basel experiences a subtle uplift in its breezy ambiance, with the average wind speed rising to 2.8 m/s (6 mph). This marks a notable increase from the preceding months, where the wind speeds generally hovered around 2.3 to 2.6 m/s. As spring transitions into summer, the gentle winds of May create a refreshing contrast to the milder breezes of April, setting the stage for a vibrant outdoor season. Following May, wind speeds tend to dip again in June, reflecting a seasonal trend of calmer conditions as the summer heat takes hold. This fluctuation not only enhances the charm of Basel’s picturesque surroundings during late spring but also suggests an impending shift towards more tranquil months ahead.
Weather in Basel varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Basel, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in May and January, there is a stark contrast in temperature and overall climate. May boasts a minimum temperature of 0°C (32°F) and an average high of 30°C (87°F), with 133 mm (5.2 in) of precipitation spread over 17 days and a humidity level of 80%. In contrast, January presents a much colder landscape, with minimum temperatures dropping to -13°C (8°F), an average of 1°C (35°F), and a maximum of only 16°C (61°F). The precipitation in January totals 94 mm (3.7 in) over 12 days, coupled with a higher humidity of 91%. This clear difference illustrates how May is generally warmer and wetter than the frigid and drier conditions typically experienced in January. For a more detailed look at January weather, check out Basel weather in January.
May and February present stark contrasts in weather conditions. In May, the temperatures range from a minimum of 0°C (32°F) to a pleasant average of 13°C (56°F), peaking at 30°C (87°F) on warmer days. This month is characterized by higher humidity levels at 80% and considerable precipitation, totaling 133 mm (5.2 in) over 17 days. In contrast, February experiences much colder temperatures, with minimums dropping to -14°C (7°F) and an average of only 4°C (39°F), reaching a maximum of 18°C (65°F). Precipitation in February is less, at 77 mm (3.0 in) over 12 days, coupled with even higher humidity at 89%. For a more detailed look, visit Basel weather in February.
When comparing the weather in March and May, one can observe significant differences in temperature and precipitation. March typically has colder temperatures, with a minimum of -13°C (9°F) and an average of 6°C (43°F), whereas May sees a more comfortable range with a minimum of 0°C (32°F) and an average of 13°C (56°F). The maximum temperature in March reaches only up to 21°C (71°F), while May can peak at 30°C (87°F). Precipitation in March amounts to 91 mm (3.6 in) over 15 days, whereas May experiences more overall rain at 133 mm (5.2 in) across 17 days. Additionally, March has slightly higher humidity at 87%, compared to 80% in May. For more detailed insights, you can check Basel weather in March.
In comparing the weather conditions of April and May, it is evident that May is generally warmer and wetter. April's temperatures range from a chilly -4°C (25°F) to a maximum of 26°C (79°F), with an average of 10°C (50°F). In contrast, May sees a minimum temperature of 0°C (32°F) and peaks at 30°C (87°F), averaging around 13°C (56°F). While April records a more moderate precipitation of 62 mm (2.4 in) over 10 days, May experiences significantly higher rainfall at 133 mm (5.2 in) across 17 days. Additionally, humidity levels are relatively similar, with April at 84% and May at 80%. For more detailed information, you can refer to Basel weather in April.
May and June exhibit noticeable differences in weather patterns. In May, temperatures range from a chilly minimum of 0°C (32°F) to a pleasantly warm maximum of 30°C (87°F), with an average of 13°C (56°F). The month is marked by significant precipitation, totaling 133 mm (5.2 in) over 17 rainy days and a humidity level averaging 80%. In contrast, June sees a rise in both temperature and humidity. The minimum temperature increases to 5°C (42°F), the average climbs to 19°C (66°F), and the maximum can reach up to 34°C (94°F). Rainfall is slightly less at 125 mm (4.9 in) spread over 16 days, with humidity marginally higher at 82%. For more detailed information, check out Basel weather in June.
When comparing the weather in May and July, we see a significant difference in temperature and conditions. May experiences a minimum temperature of 0°C (32°F) and an average temperature of 13°C (56°F), while July has warmer temperatures, with a minimum of 8°C (47°F) and an average of 20°C (68°F). July can reach a maximum of 37°C (98°F), notably higher than May’s peak of 30°C (87°F). Precipitation is slightly lower in July at 117 mm (4.6 in) over 14 days compared to May's 133 mm (5.2 in) across 17 days. Humidity levels are similar, with May at 80% and July a touch higher at 82%. For more detailed information, you can refer to Basel weather in July.
May and August present contrasting weather patterns, reflecting the transition from spring to summer. In May, temperatures range from a chilly minimum of 0°C (32°F) to a warm maximum of 30°C (87°F), with an average of 13°C (56°F). This month sees relatively high precipitation, with 133 mm (5.2 in) falling over 17 days and humidity levels at 80%.
In contrast, August offers a warmer climate, with temperatures starting at a minimum of 6°C (43°F) and peaking at 35°C (95°F), averaging around 20°C (68°F). Precipitation decreases slightly to 115 mm (4.5 in) across 15 days, and humidity is slightly lower at 77%. For more details on the weather conditions in August, you can visit Basel weather in August.
May and September exhibit some intriguing differences in weather patterns. In May, temperatures range from a minimum of 0°C (32°F) to a maximum of 30°C (87°F), with an average of 13°C (56°F). This month sees a considerable amount of precipitation, totaling 133 mm (5.2 in) over 17 days, and the humidity hovers around 80%. In contrast, September brings slightly warmer temperatures with a minimum of 1°C (35°F), an average of 16°C (60°F), and a similar maximum of 30°C (86°F). However, it experiences significantly less rainfall, only 67 mm (2.6 in) across 10 days, with humidity slightly higher at 81%. For a more detailed look at the weather trends, check out Basel weather in September.
May and October present contrasting weather conditions, with May typically warmer and more variable. In May, temperatures range from a chilly 0°C (32°F) at night to a warm 30°C (87°F) during the day, with an average of 13°C (56°F). The month sees considerable precipitation, totaling 133 mm (5.2 in) over about 17 days, and a humidity level of 80%.
In contrast, October experiences cooler temperatures, with nighttime lows dipping to -1°C (30°F) and daytime highs reaching up to 24°C (76°F), averaging around 11°C (51°F). The month receives less rainfall, at 92 mm (3.6 in) over 14 days, and carries a slightly higher humidity level of 89%. For more detailed insights, you can check Basel weather in October.
May and November present contrasting weather patterns, with May showcasing a wider range of temperatures, from a chilly 0°C (32°F) to a warm 30°C (87°F), and an average of 13°C (56°F). In contrast, November experiences cooler temperatures, ranging from a minimum of -4°C (25°F) to a mild maximum of 21°C (70°F), with an average of only 5°C (41°F). While May sees a higher total precipitation of 133 mm (5.2 in) over 17 days, November has less precipitation at 79 mm (3.1 in) spread across 13 days. Additionally, November tends to be slightly more humid, averaging 89% compared to May's 80%. For more detailed insights, you can check Basel weather in November.
In comparing the weather of May and December, significant differences become apparent. May generally enjoys a milder climate with average temperatures around 13°C (56°F), reaching highs of up to 30°C (87°F), while December's average temperature drops to just 3°C (38°F), peaking at 14°C (57°F). Precipitation levels are relatively similar, with May receiving 133 mm (5.2 in) over 17 days and December having 129 mm (5.1 in) over 19 days. However, December experiences notably higher humidity at 91% compared to May's 80%. For more details on December weather, you can check Basel weather in December.
As the calendar shifts to May, Basel comes alive with a delightful transformation in its weather. This month experiences a gentle rise in temperatures, making it markedly warmer than the cooler months preceding it. However, occasional rain shows its presence on about half the days, adding a refreshing touch to the air infused with 80% humidity. Unlike the chill of early spring, May brings a tapestry of warmth and moisture, paving the way for vibrant blooms and outdoor activities. For those planning a visit or simply curious about the city’s climate, be sure to explore more at Basel Climate.