Last updated: March 24, 2025
May in San Francesco, Italy unveils a delightful climate, with maximum temperatures reaching up to 29°C (84°F) and an average of 15°C (59°F). While the minimum temperature dips to 2°C (37°F), the month brings a notable precipitation total of 126 mm (5.0 in) across 17 rainy days, contributing to the region's lush landscape. With an average humidity level of 69%, visitors can expect a refreshing yet occasionally damp atmosphere, perfect for exploring the picturesque sights and vibrant culture of this enchanting Italian locale.
As May unfolds in San Francesco, Italy, the temperatures begin to blossom, showcasing a delightful transition into late spring. With minimums rising to 2°C (37°F) and averages climbing to a pleasant 15°C (59°F), the town shakes off the chill of winter and embraces milder weather. The maximum temperatures can reach a warm 29°C (84°F), promising sunny days perfect for outdoor adventures. This month marks a clear upward trend from April, when temperatures hovered between breezy lows of -4°C (26°F) and highs of 24°C (75°F). As nature bursts into color, visitors and locals alike can revel in the increasingly inviting climate, making May an ideal time to explore all that San Francesco has to offer.
May in San Francisco, Italy, marks a significant uptick in precipitation, with 126 mm (5.0 in) of rain falling over 17 days. This trend of increased moisture following the milder April is indicative of the transition into the warmer months of spring. Notably, the rainfall in May surpasses that of all previous months, highlighting its importance as a precursor to the drier summer season. As spring blossoms, the frequent showers not only nourish the verdant landscapes but also prepare the region for the forthcoming heat, ensuring a vibrant and lush environment in the months ahead. The consistent rain patterns observed in May resonate with a broader climate narrative in San Francisco, where varied precipitation levels shape the local ecosystem and agricultural rhythms.
As spring transitions into summer in San Francisco, May brings a slightly cooler feel, with humidity levels hovering around 69%. This marks a gradual decrease from the wetter months of January and February—where humidity peaks at 84% and 76%, respectively. Following the mild April at 70%, May's figures reflect a trend towards a drier climate, setting the stage for the warmer, sunnier months ahead. June continues this trajectory, dropping further to 62%, while summer months, particularly July and August, enjoy much lower humidity, reaching their minimums at 57% and 55%. The transition from moist spring to dry summer not only enhances the city's picturesque charm but also invites outdoor pursuits in the pleasant San Francisco climate.
As we transition into May, San Francesco experiences a significant increase in the UV Index, rising to 8, which falls into the very high exposure category. This marks a dramatic shift from the milder conditions of January and February, where the UV Index hovered between 2 and 4, presenting low to moderate risks. With this peak in May, residents and visitors should be mindful that the potential for sunburn can occur in just 15 minutes of unprotected exposure. This trend continues into June and July, where the UV Index reaches its highest at 10. It's essential to plan outdoor activities accordingly and take preventive measures against UV radiation. For a complete guide to the UV Index throughout the year, visit San Francesco UV Index.
UV Risk Categories
May in San Francesco, Italy, is a delightful embrace of warmth and sunshine, boasting 384 hours of radiant daylight. As spring progresses into summer, it's evident that daylight hours are on an upward trend, having risen sharply from 311 hours in March and 343 hours in April. This increase sets the tone for the sun-soaked months ahead, peaking in June with 419 hours. The gentle transition from the cooler, cloudier days of winter, which only provided 182 hours in January, culminates in May’s vibrant ambiance. With the sun shining brighter each day, locals and visitors alike relish the perfect conditions for outdoor activities and exploration, making it a truly enchanting month in this picturesque Italian locale.
In San Francisco, May offers a transitional glimpse of spring as the sun makes its presence felt, albeit with only a 37% chance of sunny weather. This figure is a slight decline from April's 43%, indicating a tendency for the skies to be more temperamental as the month progresses. The sunny probabilities begin to rise significantly in June, peaking in the summer months, highlighting a broader trend of increased sunshine as the year unfolds. While May may not boast the brightest of days, it still heralds the approaching warmth of summer, making it a charming time for visitors looking to escape the chill of winter and embrace the city's blossoming beauty.
As spring unfolds in San Francisco, daylight hours gradually increase, setting the stage for longer, sun-filled days. In January, the city enjoys a modest 9 hours of daylight, which steadily climbs to 10 hours by February. The trend continues as March brings 11 hours, followed by a significant leap to 13 hours in April. May marks a delightful culmination in this pattern, with daylight extending to 14 hours, creating the perfect backdrop for outdoor activities and celebrations. This trend peaks in June and July at 15 hours, before tapering off in the late summer and autumn months. By October, daylight slips back to 10 hours, and as the year closes, November and December bring shorter days with only 9 and 8 hours, respectively. Thus, while San Francisco's daylight duration ebbs and flows throughout the year, late spring and early summer offer the brightest and most vibrant days for residents and visitors alike.
In May, the winds in San Francisco start to pick up slightly, reaching an average speed of 2.5 m/s (about 6 mph), making it one of the breezier months of the year. This gentle increase from previous months—where wind speeds hovered around 2.1 m/s—signals a transition into the warmer season, invigorating both the atmosphere and the vibrant cityscape. As spring blossoms into summer, the more noticeable wind adds a refreshing touch, setting a perfect backdrop for outdoor activities and seaside strolls. Following May, however, the winds ease again into the summer months, dipping to around 1.6 m/s in June. This cyclical pattern highlights how San Francisco's winds evolve with the seasons, offering a unique charm to each month's character.
The weather in San Francesco 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 San Francesco and find detailed weather information for every month.
In comparing the weather between May and January, one can see a significant contrast. May experiences much warmer temperatures, with a minimum of 2°C (37°F) and an average reaching 15°C (59°F), whereas January starts much colder, with temperatures dipping to a minimum of -8°C (17°F) and averaging just 3°C (38°F). Additionally, May sees more days of precipitation at 17 days, accumulating 126 mm (5.0 in), compared to January's 8 days and 61 mm (2.4 in). The humidity is also higher in January at 84%, while May has a more moderate humidity level of 69%. For those interested in January's weather specifics, you can find more details here: San Francesco weather in January.
The weather in May is significantly warmer and more variable compared to February. While February sees minimum temperatures drop to -12°C (10°F) and an average of only 6°C (43°F), May boasts a minimum of 2°C (37°F) and an average of 15°C (59°F), with maximum temperatures reaching up to 29°C (84°F). Additionally, May experiences more days of precipitation—17 days with a total of 126 mm (5.0 in)—compared to February's 11 days and 105 mm (4.1 in). However, February has a slightly higher humidity level at 76%, compared to May's 69%. For more details on February weather specifics, you can explore this link: San Francesco weather in February.
May generally experiences milder and more pleasant weather compared to March. With temperatures ranging from a minimum of 2°C (37°F) to a maximum of 29°C (84°F) and an average of 15°C (59°F), May offers a much warmer climate, while March's temperatures can dip as low as -15°C (5°F) and average around 7°C (45°F). Additionally, precipitation in May is higher at 126 mm (5.0 in) over 17 days, compared to March's 89 mm (3.5 in) over 11 days, though both months maintain similar humidity levels. For more detailed information about March weather, you can visit San Francesco weather in March.
In comparing the weather of May and April, there are notable differences in both temperature and precipitation. May experiences a wider temperature range, with a minimum of 2°C (37°F) and an average of 15°C (59°F), peaking at a warm 29°C (84°F), while April starts cooler with a minimum of -4°C (26°F) and an average of 11°C (52°F), maxing out at 24°C (75°F). Precipitation in May is also higher, totaling 126 mm (5.0 in) over 17 days, compared to April's 96 mm (3.8 in) over 12 days. Interestingly, humidity remains relatively similar, at 69% in May and 70% in April. For a detailed look at April's conditions, you can visit San Francesco weather in April.
In comparing the weather of May and June, it's evident that June brings warmer temperatures, with an average of 20°C (68°F) compared to May's 15°C (59°F). The maximum temperature in June can reach up to 34°C (94°F), significantly higher than May's peak of 29°C (84°F). Additionally, June experiences less precipitation, totaling 58 mm (2.3 in) over just 8 days, in contrast to May’s 126 mm (5.0 in) over 17 days, leading to drier conditions. Humidity also decreases slightly in June to 62%, making the overall feel of the month more comfortable. For more details, check out San Francesco weather in June.
May and July present quite distinct weather patterns. In May, temperatures range from a chilly 2°C (37°F) at night to a pleasant average of 15°C (59°F), with maximums reaching 29°C (84°F). The month experiences significant rainfall, with about 126 mm (5.0 in) over 17 days, contributing to a higher humidity level of 69%. In contrast, July warms up considerably, with minimum temperatures around 11°C (51°F) and an average of 22°C (73°F), peaking at a hot 35°C (95°F). Rainfall decreases significantly to just 46 mm (1.8 in) spread over only 6 days, and the humidity drops to a more comfortable 57%. For a deeper dive into July's conditions, you can check out San Francesco weather in July.
May and August showcase distinct weather patterns. In May, temperatures range from a chilly 2°C (37°F) to a warm 29°C (84°F), resulting in an average of 15°C (59°F). This month also experiences considerable precipitation, with about 126 mm (5.0 in) over 17 days, leading to a high humidity level of 69%. In contrast, August brings significantly warmer temperatures, with a minimum of 11°C (52°F) and a peak of 34°C (94°F), averaging 23°C (73°F). Precipitation drops dramatically to just 43 mm (1.7 in) over 7 days, and humidity decreases to 55%, creating a much drier atmosphere. For more detailed insights, visit San Francesco weather in August.
May and September offer distinctly different weather experiences. In May, temperatures range from a chilly 2°C (37°F) at night to a warm 29°C (84°F) during the day, with an average temperature of 15°C (59°F). This month also sees significant rainfall, with 126 mm (5.0 in) spread over 17 days, resulting in a humidity level of 69%. In contrast, September has slightly warmer nights with temperatures starting at 5°C (42°F) and reaching the same maximum of 29°C (84°F), but with an average of 18°C (65°F). Precipitation decreases to 83 mm (3.3 in) over just 10 days, and humidity remains low at 66%. Overall, while both months can reach high temperatures, September typically enjoys drier weather compared to May. For a more detailed look at September's weather, check out San Francesco weather in September.
May and October exhibit distinct differences in weather patterns. In May, temperatures range from a minimum of 2°C (37°F) to a maximum of 29°C (84°F), providing a warm average of 15°C (59°F), while October's temperatures are slightly cooler, with a minimum of 3°C (38°F) and a maximum of 24°C (75°F), leading to an average of 13°C (56°F). Precipitation in May is higher at 126 mm (5.0 in) over 17 days, compared to October's 94 mm (3.7 in) across just 10 days. Additionally, humidity levels are greater in October at 79%, versus May's 69%. For more insights on October weather in the region, you can check out San Francesco weather in October.
May and November present contrasting weather patterns. In May, temperatures range from a cool 2°C (37°F) to a warm 29°C (84°F), with an average of 15°C (59°F). The month experiences moderate rainfall, totaling 126 mm (5.0 in) over about 17 days, and humidity levels are around 69%. In contrast, November brings cooler temperatures, with a minimum of -2°C (29°F) and a maximum of 18°C (64°F), averaging 9°C (48°F). Unlike May, November sees slightly higher precipitation at 143 mm (5.6 in) over 13 rainy days, accompanied by increased humidity at 84%. For a more detailed look at November weather, visit San Francesco weather in November.
May and December showcase quite contrasting weather conditions. In May, temperatures range from a minimum of 2°C (37°F) to a comfortable average of 15°C (59°F), with highs reaching up to 29°C (84°F). This month experiences 126 mm (5.0 in) of precipitation over about 17 days, accompanied by a humidity level of 69%. On the other hand, December brings a chillier climate, with temperatures ranging from a minimum of -5°C (23°F) to an average of 5°C (41°F), peaking at a maximum of 14°C (58°F). Precipitation slightly increases to 138 mm (5.4 in) across 14 days, while humidity rises significantly to 83%. For more detailed information, you can check out San Francesco weather in December.
As May unfolds in San Francesco, the weather transitions into a delightful blend of warmth and mildness, starkly contrasting the cooler months that precede it. With average temperatures hovering around a pleasant 15°C (59°F), this month invites visitors to enjoy the outdoors despite experiencing frequent rain, with 17 days of precipitation throughout the month. Humidity levels climb to 69%, adding a refreshing feel to the air, yet the warmth can reach a maximum of 29°C (84°F) on sunnier days. This pleasant shift makes May an ideal time for exploration and enjoyment of the vibrant scenery. For more insights into the climate as you plan your visit, check out San Francesco Climate.