Last updated: August 21, 2025
In May, Naantali, Finland experiences a diverse climate, with temperatures ranging from a brisk -4°C (26°F) to a pleasantly warm maximum of 26°C (79°F). The average temperature settles at a mild 10°C (49°F), making it a transitional month as spring unfolds. Rainfall contributes to the region's lush landscape, with 44 mm (1.7 in) of precipitation spread over nine days, fostering a vibrant atmosphere. Humidity levels hover around 77%, adding to the refreshing breeziness of the season, ideal for outdoor activities and exploration of Naantali's charming coastal beauty.
As spring unfolds in Naantali, Finland, May brings a delightful transition from the lingering chill of winter to a more temperate climate. With temperatures ranging from a minimum of -4°C (26°F) to a maximum of 26°C (79°F), the month showcases an average of 10°C (49°F), inviting residents and visitors alike to enjoy the warming sun. Compared to the harsh cold of earlier months, May marks a significant shift; it is notably milder than April, which still bears the winter's bite, while hinting at the vibrant warmth of the upcoming summer months. This rich interplay between cool mornings and pleasantly warm afternoons makes May an ideal time to explore the scenic beauty of Naantali as nature awakens and blooms.
In May, Naantali experiences a noteworthy turning point in precipitation, mirroring the wet conditions seen in March with 44 mm (1.7 in) of rain over nine days. This amount suggests a return to the dampness that characterizes the Finnish spring, providing much-needed moisture for the budding flora. While April saw a drop to 32 mm, May revives the precipitation trend, paving the way for an increasingly lush landscape as summer approaches. Interestingly, as we look ahead, the forthcoming months hint at a surge in rain, with July and August set to bring notably higher totals. This month not only marks a transition but also primes the region for the more abundant rains to come.
As spring unfolds in Naantali, Finland, May brings a noticeable shift in humidity levels, dropping to 77%—the lowest for the year so far. This decline marks a transitional period, following the higher humidity in the preceding months of winter and early spring, where levels hovered around 89% to 92%. The reduction in moisture not only signifies the warming temperatures, but also sets the stage for a picturesque summer. Interestingly, as we move into the summer months, humidity levels stabilize around 78%, indicating a slight uptick as lush greenery revitalizes the landscape. This pattern reflects the coastal climate of Naantali, where atmospheric conditions fluctuate seasonally, ultimately shaping its beautiful and inviting environment.
As spring gives way to summer in Naantali, Finland, the UV Index rises steadily, signaling a shift in sun exposure. In May, the UV Index reaches 5, categorizing it as moderate, which means the burn time is approximately 30 minutes for most skin types. This marks the continuation of an upward trend seen since March, when the UV Index began to climb from a low of 1 in January and February. With the sun gaining strength, it's a great time to enjoy outdoor activities while still being mindful of skin protection. As the season progresses into June, the UV Index will peak at 7, highlighting the importance of staying vigilant against sun damage. For more information on UV exposure throughout the year, visit Naantali UV Index.
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In May, Naantali, Finland, basks in an impressive 458 hours of sunshine, a delightful crescendo following the gradual increase from the winter months. As daylight lengthens, the city transitions from a mere 63 hours in January to a vibrant and sunlit May, marking a significant leap that fosters a sense of rejuvenation. This month stands out as the turning point before the peak in June, which boasts 494 hours of sunlight, further affirming the trend of increasing brightness that characterizes the enchanting Finnish spring. With each passing month, the sun's embrace becomes ever more generous, making May a particularly joyous time for residents and visitors alike, eager to savor the blooming nature under vast blue skies.
In Naantali, Finland, the likelihood of sunny weather fluctuates significantly throughout the year. As winter wanes, May captures a promising moment with a 33% chance of sunshine, although this is a decrease from the 52% sunny days observed in April. The trend suggests that while May is often embraced for its milder temperatures, it can be somewhat unpredictable. As summer approaches, the sunshine probability increases, peaking in July at 57%, indicating that those looking for reliable sunny days might want to plan their stay for mid-summer. Therefore, while May offers a delightful blend of spring charm, it's essential to keep a flexible outlook on the sun's appearance.
As the seasons shift in Naantali, Finland, daylight duration experiences a remarkable transformation. Starting from a modest 6 hours in January, the days gradually lengthen, reaching 9 hours in February and 11 hours by March, signaling the end of winter's grip. April brings a surge to 14 hours, paving the way for the glorious 17 hours of daylight in May, where the vibrant blooms of spring are complemented by the increasing sunshine. This trend peaks in June and July with a stunning 18 hours of daylight, offering long, bright evenings perfect for outdoor gatherings. As summer transitions to autumn, the daylight tapers off to 15 hours in August, before declining to 12 hours in September and further to 10 hours in October. Ultimately, November and December bring shorter days, tumbling down to just 5 hours of daylight, demonstrating the cyclical nature of light in this enchanting Finnish locale.
In Naantali, Finland, the month of May typically experiences a gentle breeze with an average wind speed of 3.6 m/s (8 mph), marking a slight decline from the slightly stronger gusts of earlier spring months. This trend reveals a gradual wind slowdown as the warmer months approach, contrasting with October, which boasts the highest average wind speed of 5.3 m/s (12 mph). Moreover, as the year progresses, wind speeds tend to fluctuate, with summer months like June and July witnessing the calmest conditions. This consistent pattern highlights May as a transition point, where the winds become softer, setting the stage for the tranquil summer days that lie ahead.
Weather in Naantali varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Naantali, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between May and January, there is a striking contrast in temperatures and conditions. May enjoys a much milder average temperature of 10°C (49°F), with maximums reaching 26°C (79°F), while January can be quite frigid, averaging -2°C (29°F) and only peaking at 8°C (47°F). Although both months experience a similar number of precipitation days—9 days—the total precipitation in January at 48 mm (1.9 in) is slightly higher than May's 44 mm (1.7 in). Additionally, January's humidity level at 92% contributes to a colder, more damp feeling, compared to May's more moderate 77% humidity. For more information about the conditions in January, you can check out Naantali weather in January.
May and February present contrasting weather patterns, with May showcasing milder temperatures and a more pleasant atmosphere. In May, temperatures range from a chilly minimum of -4°C (26°F) to a comfortable maximum of 26°C (79°F), while February experiences much colder conditions, with temperatures dipping as low as -20°C (-4°F) and only reaching a maximum of 7°C (44°F). Both months see similar levels of precipitation, around 44 mm (1.7 in) in May and 42 mm (1.7 in) in February, but February is marked by higher humidity at 90%, compared to 77% in May. For a closer look at the February climate, you can visit Naantali weather in February.
When comparing the weather in May and March, we see a notable difference in temperature and overall conditions. In May, temperatures range from a minimum of -4°C (26°F) to a pleasant maximum of 26°C (79°F), with an average of 10°C (49°F). In contrast, March is significantly colder, with temperatures dipping as low as -23°C (-9°F) and peaking at just 11°C (52°F), averaging around 0°C (32°F). Both months receive the same amount of precipitation—44 mm (1.7 in)—over nine days, but March tends to have higher humidity at 89% compared to May's 77%. For a deeper understanding of the colder conditions in March, you can explore Naantali weather in March.
May generally showcases milder temperatures compared to April, with a noticeable increase in the average temperature from 4°C (39°F) in April to 10°C (49°F) in May. While both months experience similar precipitation days—with rain occurring on 9 days—May sees a slight uptick in total rainfall at 44 mm (1.7 in), compared to April's 32 mm (1.3 in). Additionally, humidity levels drop slightly in May to 77%, down from April's higher humidity of 85%. Overall, May marks a transition towards warmer and more pleasant weather. For more details, check Naantali weather in April.
May and June exhibit a noticeable shift in weather patterns. In May, temperatures range from a minimum of -4°C (26°F) to a maximum of 26°C (79°F), with an average of 10°C (49°F). It experiences a fair amount of precipitation at 44 mm (1.7 in) over 9 days, along with a humidity level of 77%. By contrast, June warms up significantly, featuring a minimum of 3°C (38°F) and a maximum of 28°C (83°F), with an average temperature of 16°C (61°F). Precipitation remains similar at 43 mm (1.7 in) but occurs over just 7 days, and humidity slightly increases to 78%. This transition marks June as a more pleasant and warmer month compared to May. For more details on June weather, you can check Naantali weather in June.
In May, temperatures vary significantly, with lows reaching -4°C (26°F) and highs peaking at 26°C (79°F), presenting a mild average of 10°C (49°F). The month also sees an average of 44 mm (1.7 in) of precipitation over approximately 9 days, combined with a relatively high humidity level of 77%. In contrast, July brings warmer conditions with minimum temperatures at 6°C (44°F) and maximums rising to 31°C (89°F), leading to a comfortable average of 18°C (64°F). Rainfall increases to 75 mm (3.0 in) over 11 days, while humidity remains slightly elevated at 78%. For more details on the weather in July, you can check this link: Naantali weather in July.
May and August present notable differences in weather conditions. In May, temperatures range from a chilly minimum of -4°C (26°F) to a pleasant average of 10°C (49°F), peaking at a maximum of 26°C (79°F). The month sees an average humidity of 77% and experiences 44 mm (1.7 in) of precipitation over about 9 days. In contrast, August offers warmer weather, with temperatures starting at a minimum of 6°C (43°F), an average of 17°C (62°F), and reaching up to 28°C (83°F). It also tends to be wetter, with 87 mm (3.4 in) of precipitation spread over 14 days and a slightly higher humidity of 79%. For a detailed look at August weather, you can visit Naantali weather in August.
Comparing the weather in May and September reveals notable differences in temperature and precipitation patterns. May typically experiences a minimum temperature of -4°C (26°F) and an average of 10°C (49°F), peaking at a comfortable 26°C (79°F). In contrast, September offers slightly milder conditions with minimum temperatures around -1°C (31°F), averaging 12°C (54°F) and reaching a maximum of 23°C (73°F).
Precipitation is more pronounced in September, accumulating to 72 mm (2.8 in) over 12 days, compared to May's 44 mm (1.7 in) across just 9 days. Additionally, humidity levels rise in September to 86%, compared to May’s 77%, making the latter month feel somewhat crisper. For more detailed insights on September weather, you can visit Naantali weather in September.
May and October present contrasting weather patterns. In May, temperatures range from a minimum of -4°C (26°F) to a maximum of 26°C (79°F), making it a notably warmer month with an average of 10°C (49°F). Precipitation is moderate at 44 mm (1.7 in), spread over 9 days, and humidity sits at a comfortable 77%. In contrast, October experiences cooler conditions, with temperatures dipping slightly lower, ranging from -5°C (23°F) to a maximum of 17°C (62°F) and an average of 7°C (46°F). The month is wetter, with 86 mm (3.4 in) of precipitation over 17 days and higher humidity at 90%. For a more detailed view, visit Naantali weather in October.
In comparing the weather between May and November, we see a distinct shift in temperatures and conditions. May typically experiences a milder climate, with average temperatures around 10°C (49°F) and maximums reaching up to 26°C (79°F), while November sees cooler averages at just 4°C (39°F) and highs peaking at 13°C (56°F). Precipitation increases in November, totaling 59 mm (2.3 in) over approximately 12 days, compared to May's 44 mm (1.7 in) across 9 days, contributing to a higher humidity level of 91% in November versus 77% in May. For more detailed information about November's weather, you can visit Naantali weather in November.
In May, temperatures begin to warm up, ranging from a minimum of -4°C (26°F) to a pleasant maximum of 26°C (79°F), with an average of 10°C (49°F). The month sees relatively low precipitation of 44 mm (1.7 in) over about 9 days, alongside a moderate humidity level of 77%. In contrast, December experiences a stark drop in temperature, with lows plunging to -18°C (-1°F) and an average of 0°C (32°F), peaking at just 7°C (45°F). This winter month is significantly wetter, with 79 mm (3.1 in) of precipitation falling over 15 days, and a higher humidity of 89%. For more specific details on December's weather conditions, you can visit Naantali weather in December.
As spring blooms in Naantali, May offers a delightful transition from the lingering chill of winter to the warmth of summer. With temperatures soaring to a pleasant maximum of 26°C (79°F), the month boasts a significant jump from the cool averages of earlier months, while occasional frosty nights remind us of the winter past. Although May sees around nine days of rain, the overall precipitation remains manageable at 44 mm (1.7 in), accompanied by humidity levels hovering around 77%, creating a refreshing atmosphere. This combination of warmth and moisture sets the stage for vibrant flora and sunny days, making May a standout month in Naantali's climatic calendar. For more details on what to expect throughout the year, check out the complete Naantali Climate guide.