Last updated: February 24, 2025
In May, Lisbon showcases a delightful blend of warm temperatures and refreshing breezes, making it an ideal time to explore this vibrant city. With maximum temperatures reaching up to 30°C (86°F) and an average of 17°C (63°F), visitors can enjoy comfortable days and pleasant evenings. The season brings a gentle touch of rain with precipitation totaling 36 mm (1.4 in) over just four days, while humidity hovers around 70%, adding a slight warmth to the air. This inviting weather creates the perfect backdrop for savoring Lisbon's stunning architecture, rich history, and outdoor cafes.
As May ushers in the warmth of spring in Lisbon, the city transforms into a vibrant backdrop for exploration. With temperatures ranging from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), the month boasts an inviting average of 17°C (63°F). This delightful rise in temperatures signals a shift from the cooler months of early spring, making it an ideal time for outdoor activities and enjoying the city's rich cultural offerings. As the days lengthen and the sun shines brighter, May becomes a perfect prelude to the hot summer months ahead, providing a charming blend of pleasant warmth and refreshing breezes.
In Lisbon, May marks a notable shift in precipitation patterns as spring transitions towards summer. With only 36 mm (1.4 in) of rainfall spread over a mere 4 days, May is one of the driest months of the year, just before the dry heat of summer sets in. This dip in precipitation follows a steady increase from January through April, where rainfall peaks at 73 mm (2.9 in) in April. As the city basks in warm weather, the lighter showers of May suggest a gentle farewell to the rainy season, paving the way for June's dry spell. This trend highlights Lisbon's characteristic climate, where early months signal growth and abundance, while late spring embraces the sunshine, encouraging outdoor exploration and vibrant city life.
As spring transitions into summer, May in Lisbon maintains a moderate humidity level of 70%, mirroring the comfortable conditions of the preceding month. This consistent level of humidity signifies a gradual shift from the damp chill of winter months, where humidity peaks at 85% in January, down to drier times in the summer, with June, July, and August experiencing lower humidity levels around 60%. The trend here highlights Lisbon's gradual warming as the year progresses, making May an enjoyable month to experience the city’s vibrant atmosphere without the discomfort of high humidity. As the city prepares for the heat of summer, May offers a sweet spot of balance that's perfect for outdoor exploration.
As May rolls into Lisbon, the UV Index reaches a noteworthy 10, signaling a very high level of ultraviolet radiation and a burn time of just 15 minutes. This marks a continuation of a steady increase observed since April, where the index peaked at 9. With each passing month, UV exposure intensifies, and May's reading serves as a precursor to the impending summer months, where UV levels can soar to extreme heights. As residents and visitors bask in the beautiful Mediterranean sun, it's crucial to take precautions, especially as June approaches with an even higher index of 11. For more insights on UV exposure levels throughout the year, check out the Lisbon UV Index.
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May heralds a delightful surge in sunshine in Lisbon, boasting 407 hours of radiant daylight, the highest of the year so far. This month marks a seamless transition from the crisp beginnings of spring, with a notable increase from 354 hours in April. As days grow longer and warmer, visitors can revel in the city's stunning landscapes and vibrant culture, all under the embrace of golden rays. Following May, June continues this trend with 411 hours, leading into the sun-drenched summer months. The gradual ascension of sunlight hours throughout spring is not just a precursor to the summer heat, but an invitation to experience the blossoming charm of Lisbon, where every sunlit moment enhances the city's allure.
As spring transitions into summer, Lisbon experiences a noticeable increase in sunny weather, with **May enjoying a solid 57% chance of sunshine. This marks a significant improvement compared to April's 39%, reflecting a trend where the likelihood of clear skies steadily climbs as the year progresses. Following May, June sees a leap to 66%, paving the way for the sun-soaked summer months. This delightful pattern not only enhances the city's vibrancy but also beckons visitors to fully embrace the beauty of Lisbon's landscapes under the warm spring sun.
In Lisbon, Portugal, the month of May heralds a vibrant escalation in daylight, with 14 hours of sun drawing residents and visitors alike outdoors to savor the increasingly warm and enjoyable weather. Following the gradual increase from 9 hours in January to 13 hours in April, May's extended daylight sets the stage for a lively early summer atmosphere. As the days lengthen, the city awakens with energy, embracing outdoor activities and celebrations. This trend continues through June and July, where the daylight peaks at 14 hours, before slowly tapering off into the rhythm of autumn by September. The consistent growth in daylight throughout spring showcases Lisbon's transition into a season filled with growth and possibility, inviting all to bask in its sun-kissed charm.
In May, Lisbon experiences a delightful uptick in average wind speed, reaching 5.5 m/s (12 mph)—a gentle breeze that invigorates the city’s vibrant atmosphere. This marks the beginning of the summer months, with winds becoming consistently stronger compared to the previous months, especially April's calmer days averaging just 3.6 m/s (8 mph). As the season progresses into June and July, wind speeds remain steady, hinting at an alluring mix of refreshing air and sunny delight. The overall trend showcases Lisbon's transition from the soft whispers of spring to the lively gusts of early summer, inviting both locals and visitors to revel in the city’s charm under the open sky.
The weather in Lisbon changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Lisbon and find detailed weather information for every month.
May and January present contrasting weather patterns, each with its unique characteristics. In May, temperatures range from a comfortable minimum of 10°C (50°F) to a warm maximum of 30°C (86°F), alongside an average of 17°C (63°F). The month sees relatively low precipitation at 36 mm (1.4 in) over just 4 days, with humidity around 70%. In contrast, January offers cooler temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 19°C (66°F), with an average of 12°C (53°F). Precipitation is slightly higher at 37 mm (1.5 in) over 5 days, and the humidity is more pronounced at 85%. For more details on the weather in January, visit Lisbon weather in January.
May and February present quite distinct weather patterns. In May, temperatures generally range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F), making it a warmer month overall. The average humidity in May is around 70%, accompanied by relatively light precipitation of 36 mm (1.4 in) over about 4 days. In contrast, February features cooler temperatures, with a minimum of 5°C (41°F) and a maximum of 21°C (70°F), averaging 13°C (55°F). February also sees more rainfall, with 53 mm (2.1 in) spread over 7 days, and slightly higher humidity levels at 75%. For more details on February weather, you can refer to Lisbon weather in February.
May generally offers warmer temperatures compared to March, with average highs reaching 30°C (86°F) versus March's maximum of 23°C (73°F). While May sees an average temperature of 17°C (63°F), March's average is a cooler 14°C (57°F). Although May has less precipitation overall, receiving just 36 mm (1.4 in) over 4 days, March experiences heavier rainfall at 66 mm (2.6 in) across 8 days. Both months have similar humidity levels, hovering around 70-72%. For more details on the weather during this time, you can check Lisbon weather in March.
In comparing the weather between April and May, we can see a notable increase in temperature during May, with average temperatures rising from 15°C (59°F) in April to 17°C (63°F). The maximum temperatures also jump to 30°C (86°F) in May, compared to just 24°C (75°F) in April. However, May experiences significantly less precipitation, totaling only 36 mm (1.4 in) over four days, in contrast to April's 73 mm (2.9 in) spread over twelve days. Despite both months sharing a humidity level of 70%, May offers a warmer and drier climate. For more insights on April's weather, you can visit Lisbon weather in April.
In May, temperatures range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). The month experiences about 36 mm (1.4 in) of precipitation over 4 days, alongside a humidity level of 70%. In contrast, June brings slightly warmer temperatures, with a minimum of 13°C (56°F) and a maximum reaching 32°C (90°F), averaging 18°C (66°F). Precipitation drops significantly to 11 mm (0.4 in) over just 3 days, and the humidity decreases to 63%. For more detailed information, check out Lisbon weather in June.
In May, temperatures begin to warm up, with lows around 10°C (50°F) and an average of 17°C (63°F), peaking at 30°C (86°F). The month experiences higher precipitation, with about 36 mm (1.4 in) over four days, and humidity levels sit at around 70%. In contrast, July sees a slight increase in minimum temperatures to 15°C (59°F) and an average of 20°C (68°F), with a maximum similar to May at 31°C (87°F). However, July boasts significantly less rainfall, with just 5 mm (0.2 in) and zero rainy days, along with lower humidity at 60%. For more details, check out Lisbon weather in July.
In May, temperatures in Lisbon range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). The month sees about 36 mm (1.4 inches) of precipitation over four days, coupled with a humidity level of 70%. In contrast, August experiences warmer temperatures, with a minimum of 16°C (61°F) and a high of 35°C (95°F), averaging at 20°C (69°F). This month boasts significantly lower precipitation, recording just 3 mm (0.1 inches) and typically no rainy days, contributing to a drier atmosphere with 60% humidity. For more detailed information, check out Lisbon weather in August.
May and September both offer mild weather, but there are notable differences. In May, temperatures range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). This month sees more rain, with a total of 36 mm (1.4 in) over about four days, and the humidity is relatively high at 70%. In contrast, September enjoys slightly warmer temperatures, with a minimum of 14°C (58°F), an average of 20°C (68°F), and a maximum of 29°C (84°F). Precipitation is lower at 27 mm (1.1 in) spread across just two days, accompanied by a slightly lower humidity level of 67%. For more details about September weather, you can check Lisbon weather in September.
In May, temperatures in Lisbon typically range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). The month sees about 36 mm (1.4 in) of precipitation over approximately 4 days, and the humidity hovers around 70%. By contrast, October presents a slightly different climate, with temperatures ranging from 10°C (50°F) to a maximum of 28°C (82°F) and an average of 18°C (65°F). Precipitation increases to 46 mm (1.8 in) over about 5 days, and humidity rises to 74%. This contrast highlights the transition from late spring warmth to the cooler, more humid autumn conditions. For more detailed information, check out Lisbon weather in October.
May typically brings warmer temperatures with a minimum of 10°C (50°F) and an average of 17°C (63°F), peaking at a high of 30°C (86°F). In contrast, November experiences cooler averages, with a minimum of 9°C (48°F) and a maximum of 23°C (73°F), averaging around 15°C (59°F). Additionally, November is considerably wetter, receiving 80 mm (3.2 in) of precipitation over 11 days compared to May's 36 mm (1.4 in) over just 4 days. The humidity also rises in November to 83%, compared to May's 70%. For more detailed information, check out Lisbon weather in November.
May and December in Lisbon present notable contrasts in weather. In May, temperatures range from a minimum of 10°C (50°F) to a maximum of 30°C (86°F), with an average of 17°C (63°F). This month enjoys relatively low precipitation, totaling 36 mm (1.4 in) over just 4 days, and a humidity level of 70%. In contrast, December experiences cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 18°C (65°F), averaging at 13°C (56°F). Additionally, December is wetter, receiving 62 mm (2.4 in) of rainfall spread across 8 days, and exhibits higher humidity at 85%. For more detailed information, visit Lisbon weather in December.
As spring transitions to summer, May in Lisbon offers a delightful contrast to the cooler months, characterized by a significant rise in temperatures and a refreshing ambiance. With an average of 17°C, the weather is pleasantly warm, reaching a peak of 30°C on sunny days, inviting outdoor activities and exploration. Unlike the wetter months preceding it, May experiences only a few days of rainfall, making it one of the driest months of the year, with mere 36 mm of precipitation. Combined with 70% humidity, the resulting climate is ideal for enjoying the city's vibrant cultural scene and picturesque landscapes. Discover more about how Lisbon's weather shapes travel experiences throughout the year at Lisbon Climate.