Last updated: August 21, 2025
In Porvoo, Finland, May unveils a tapestry of temperatures ranging from a chilly -4°C (26°F) to a pleasant 29°C (84°F), with an average of 11°C (51°F) that invites both locals and visitors to embrace the vibrant spring atmosphere. While sunlight starts to dominate the days, the month sees about 50 mm (2.0 in) of rainfall spread over 10 days, contributing to a humidity level of 75% that adds a refreshing touch to the air. As nature awakens, May in Porvoo offers a captivating blend of warmth and moisture, ideal for exploration and enjoying the stunning bloom of the season.
In May, Porvoo, Finland, begins to shake off the chill of winter, showcasing a remarkable shift in temperatures that heralds the full arrival of spring. With minimums around -4°C (26°F) and delightful averages of 11°C (51°F), residents can finally step outside without heavy coats. The maximum temperatures can soar to 29°C (84°F), offering pleasant warmth that encourages outdoor activities and gatherings. This month serves as a vibrant transition, bridging the wintry cold of earlier months with the lush, summery days that follow in June. As nature awakens, May in Porvoo becomes a canvas of blossoming beauty, best enjoyed in the embrace of its warming sunshine.
In May, Porvoo experiences a moderate precipitation level of 50 mm (2.0 in), consistent with the trend observed throughout the spring, where rainfall remains stable at around 48-54 mm. The month typically sees about 10 days of rainfall, aligning closely with the previous months and hinting at a gradual transition to more variable weather patterns as summer approaches. This consistency in precipitation reflects a well-balanced climate, where the emerging greenery thrives under a gentle wash of spring rains, setting the stage for the lush landscapes that characterize the months ahead. As the year progresses, precipitation tends to increase, with June and July following with higher totals, marking a shift towards the wetter summer months.
As spring blossoms into summer, May in Porvoo, Finland marks a noticeable shift in humidity levels, dipping to a refreshing 75%. This decline from the high 87% recorded in April heralds the gradual transition toward drier months, with June mild at 74%, suggesting a period of relief from the heavy moisture of winter. While May's humidity is still significant, it reflects the pattern of decreasing humidity that continues into the summer months. Interestingly, June and July experience a slight uptick to 80%, hinting at an ebb and flow characteristic of the region's coastal climate. As we venture into August, humidity rises again to 85%, supporting the lush vegetation that thrives throughout the Finnish landscape. Overall, May stands as a pivotal month, representing both the end of the damp chill and the onset of a more temperate season.
As spring gives way to early summer, May in Porvoo, Finland, sees the UV Index rise to 5, marking a shift to a moderate exposure category. This increase invites residents and visitors alike to enjoy the growing sunshine, though caution is still advisable with a burn time of approximately 30 minutes. This trend of climbing UV levels continues into June and July, where it peaks at 7, but May serves as the perfect reminder to start thinking about sun protection. It’s a great time to embrace outdoor activities while being aware of the sun’s intensity. For more detailed insights on UV levels throughout the year, visit Porvoo UV Index.
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As spring fully unfolds in Porvoo, Finland, May heralds a remarkable surge in sunshine, boasting 451 hours of glorious daylight. This is a striking increase from the 361 hours seen in April, and it sets the stage for summer's peak. The gradual ascent of sunlight throughout the year is evident, with January languishing at a mere 52 hours and a steady climb thereafter. By March, the days extend to 262 hours, hinting at the vibrant awakening of nature, while June reaches the pinnacle with 491 hours of radiant sunshine. This clear upward trend not only brightens the landscape but also invigorates the community, inviting locals and visitors alike to bask in the warmth and beauty of Porvoo’s early summer days.
In Porvoo, Finland, the likelihood of sunny weather shows a distinct upward trend as the year progresses, peaking in the height of summer. As winter fades and spring arrives, the chances of basking in sunshine increase from a mere 5% in January to 44% in April. However, in May, the probability dips slightly to 29%, suggesting a transitional period where the warmth of summer is on the horizon, but the unpredictable nature of spring weather still prevails. This fluctuation is hardly unusual, as the sunniest months—June and July—reveal a promising 53% and 57% chance of sunshine, creating a stark contrast to the overcast winter months. As summer approaches, residents and visitors alike can look forward to more sunny days in the enchanting coastal town of Porvoo.
As spring unfolds in Porvoo, Finland, the daylight duration steadily increases, bringing a refreshing vibrancy to the landscape. By May, residents revel in around 17 hours of daylight, a significant rise from the mere 6 hours available in January. This trend continues into June and July, where the long summer days reach their peak with 18 hours of sunlight. As the year progresses, daylight begins to wane, with August still offering a generous 15 hours but tapering off towards the autumn months, dropping to 12 hours in September and then down to 10 hours in October. Despite the shorter days as winter approaches, the gradual transition from dark to light in Porvoo remains a captivating testament to the changing seasons.
In May, Porvoo experiences a gentle breeze with an average wind speed of 3.3 m/s (7 mph), slightly calmer compared to the preceding months. This subtle shift marks a transition as spring blossoms into summer, following a trend of generally moderate wind conditions from late winter through early spring. While March brings a noticeable uptick to 4.0 m/s (9 mph), the winds ease by May, aligning with the overall pattern of decreasing wind speeds into the warmer months. This delightful blend of mild winds and blooming flora makes May an inviting time to explore Porvoo, where the tranquil atmosphere complements the charming historic architecture and stunning riverside scenery.
Weather in Porvoo varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Porvoo, 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 -4°C (26°F) to a pleasant average of 11°C (51°F), occasionally peaking at a warm 29°C (84°F). The month experiences about 50 mm (2.0 in) of precipitation over approximately 10 days, accompanied by a moderate humidity level of 75%. In stark contrast, January is characterized by much colder temperatures, with a minimum of -25°C (-13°F) and an average of -3°C (27°F), rarely exceeding 8°C (47°F). This winter month sees a slight increase in precipitation at 54 mm (2.1 in) spread over 11 days, along with a markedly high humidity of 98%. For more detailed information, you can check Porvoo weather in January.
The weather in May and February presents a striking contrast. In May, temperatures can range from a chilly -4°C (26°F) at night to a comfortable 29°C (84°F) during the day, with an average temperature of 11°C (51°F). The month typically sees around 50 mm (2.0 in) of precipitation spread over 10 days, along with a humidity level of 75%. Conversely, February is much colder, with temperatures dropping to a minimum of -25°C (-13°F) and only reaching a maximum of 8°C (46°F); the average temperature is -4°C (25°F). The precipitation is slightly less at 48 mm (1.9 in), also over 10 days, but the humidity is significantly higher at 96%. For more details on February weather, you can check Porvoo weather in February.
In comparing the weather of May and March, it is evident that May experiences significantly milder conditions, with temperatures ranging from a minimum of -4°C (26°F) to a maximum of 29°C (84°F) and an average temperature of 11°C (51°F). In contrast, March remains quite cold, with mínima temperatures dropping to -23°C (-10°F) and only reaching a maximum of 13°C (55°F), yielding an average of -1°C (30°F). While both months see similar levels of precipitation—50 mm (2.0 in) in May and 49 mm (1.9 in) in March—March has slightly more rainy days at 12, compared to May's 10. The humidity is also notably higher in March at 93%, compared to 75% in May. For a deeper look into the specifics, check out Porvoo weather in March.
In comparing the weather between April and May, we can see noticeable improvements in temperature and overall conditions. April starts off with a minimum temperature of -14°C (7°F) and an average of 4°C (40°F), while May witnesses a significant rise with a minimum of -4°C (26°F) and an average of 11°C (51°F). The maximum temperatures also reflect this change, soaring from 21°C (70°F) in April to 29°C (84°F) in May. Precipitation is relatively similar, with April recording 48 mm (1.9 in) over 11 days and May seeing slightly more at 50 mm (2.0 in) over 10 days. However, humidity levels are higher in April at 87% compared to May's 75%, suggesting a drier feel as spring progresses. For more detailed insights on April weather, visit Porvoo weather in April.
In comparing the weather of May and June, we can observe a noticeable shift in temperatures and precipitation patterns. May experiences a wider temperature range, with minimums dropping to -4°C (26°F) and maximums reaching up to 29°C (84°F), while June boasts a more moderate range with minimums at 2°C (35°F) and maximums peaking at 32°C (89°F). While May sees around 50 mm of precipitation over about 10 days, June brings slightly higher rainfall at 56 mm across 11 days, resulting in similar humidity levels of approximately 75-74%. For more detailed information, you can check Porvoo weather in June.
May and July exhibit notably different weather patterns. In May, temperatures range from a chilly minimum of -4°C (26°F) to a comfortable average of 11°C (51°F), peaking at a warm 29°C (84°F). Precipitation is moderate at 50 mm (2.0 in) over about 10 days, with humidity at 75%. In contrast, July sees a warmer climate with minimum temperatures around 7°C (44°F) and an average of 18°C (65°F), hitting a maximum of 32°C (89°F). The month is slightly wetter, recording 71 mm (2.8 in) of rainfall across approximately 12 days, with humidity increasing to 80%. For more detailed insights into July weather, check out Porvoo weather in July.
In May, temperatures in Porvoo range from a chilly -4°C (26°F) at the lowest to a comfortable 29°C (84°F) at the highest, with an average temperature of 11°C (51°F). The month sees about 50 mm (2.0 in) of precipitation over approximately 10 days, with a humidity level of 75%. In contrast, August experiences warmer weather, with minimum temperatures of 6°C (43°F) and a maximum of 31°C (87°F), averaging around 16°C (62°F). Rainfall increases to 78 mm (3.1 in) across 12 days, accompanied by higher humidity at 85%. For more detailed information on August weather, check Porvoo weather in August.
May and September present a striking contrast in weather patterns. In May, temperatures range from a chilly -4°C (26°F) to a warm 29°C (84°F), with an average of 11°C (51°F) and a relatively moderate humidity level of 75%. Precipitation is lower in May, averaging 50 mm (2.0 in) over about 10 days.
In contrast, September experiences milder temperatures, with a minimum of -2°C (29°F) and a maximum of 24°C (75°F), resulting in an average of 12°C (53°F). However, it brings higher humidity at 90% and increased rainfall, totaling 63 mm (2.5 in) across approximately 12 days. For a more detailed overview, check out Porvoo weather in September.
May and October present distinct contrasts in weather conditions. In May, temperatures range from a chilly -4°C (26°F) at night to a warm 29°C (84°F) during the day, with an average of 11°C (51°F). The month sees about 50 mm (2.0 in) of precipitation over approximately 10 days, and humidity averages around 75%. In contrast, October experiences cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 17°C (64°F), yielding an average of 7°C (44°F). Precipitation increases to 80 mm (3.2 in) over about 15 days, accompanied by higher humidity levels at 94%. For a closer look at October weather specifics, check out Porvoo weather in October.
May and November exhibit markedly different weather patterns. In May, temperatures vary more dramatically, with a minimum of -4°C (26°F) and an average of 11°C (51°F), peaking at a comfortable 29°C (84°F). The month also sees about 50 mm (2.0 in) of precipitation, spread over 10 days, and humidity levels sitting at 75%. In contrast, November experiences colder conditions, with a minimum temperature of -8°C (18°F) and a chilly average of 3°C (37°F), reaching a maximum of only 12°C (54°F). Precipitation in November increases slightly to 56 mm (2.2 in), occurring over 12 days, and the humidity rises significantly to 94%, creating a damp atmosphere. For more details on November weather, you can refer to Porvoo weather in November.
In comparing the weather between May and December, it’s clear that the two months present starkly different conditions. May enjoys milder temperatures, with a minimum of -4°C (26°F) and an average of 11°C (51°F), reaching a maximum of 29°C (84°F). Meanwhile, December experiences much colder temperatures, with a minimum of -20°C (-3°F) and an average of -1°C (30°F), peaking at just 7°C (44°F). Precipitation is more frequent in December, occurring on 16 days and totaling 73 mm (2.9 in), compared to 10 days and 50 mm (2.0 in) in May. The humidity also rises significantly in December at 96%, compared to May’s 75%. For more details on December weather conditions, you can check Porvoo weather in December.
As May unfurls its charms in Porvoo, the weather presents a delightful contrast to the chill of earlier months. With daytime temperatures soaring to a warm 29°C (84°F) and the average hovering pleasantly around 11°C (51°F), the city emerges from winter's grasp, inviting residents and visitors alike to enjoy the blossoming scenery. While there may still be scattered showers—about 10 days of precipitation totaling around 50 mm (2.0 in)—the overall ambiance is marked by a refreshing humidity of 75%, adding to the vibrant feel of spring. For those looking to plan their visit, understanding these seasonal shifts is essential; dive deeper into the nuances of Porvoo's climate Porvoo Climate to make the most of your experience.