Last updated: August 21, 2025
In May, the charming town of Mariehamn in the Åland Islands experiences a delightful transition into spring. With maximum temperatures reaching 15°C (59°F) and an average of 7°C (45°F), the weather is pleasantly mild. However, it can dip to a minimum of 1°C (33°F), so a light jacket is advisable. This month sees a precipitation total of 36 mm (1.4 in) over approximately 6 days, contributing to the region's lush, green landscapes. The humidity level rides high at 77%, adding a touch of freshness to the air. Overall, May is a lovely time to explore the natural beauty of Mariehamn, as the budding flora and vibrant atmosphere invite outdoor adventures.
As spring unfolds, May in Mariehamn, Åland Islands marks a significant warming trend, with temperatures rising from the lingering chill of winter. The month kicks off with a minimum of 1°C (33°F) and sees an average temperature of 7°C (45°F), peaking at a pleasant 15°C (59°F). This transition is reflected in the gradual increase from the cooler April, where highs reached only 9°C (48°F). With each passing day, the air becomes more inviting, heralding the arrival of vibrant greenery and outdoor activities. By the end of May, residents and visitors alike can finally shed their winter layers, embracing the refreshing warmth that foreshadows the balmy summer ahead.
In Mariehamn, Åland Islands, May brings a gentle transition into the warmer months, marked by a precipitation total of 36 mm (1.4 in) across approximately 6 days. This amount reflects a slight increase from the dwindling rains of April, where only 24 mm (1.0 in) fell over 7 days. As spring blossoms into early summer, May’s rainfall sits relatively low compared to the incoming summer months, which tend to see heightened levels of precipitation. This trend suggests that while May might still experience a few rainy days, it serves as a brief respite before the heavier downpours of late summer. Enjoying the fresh air after the light showers, residents can appreciate the beauty of burgeoning greenery during this period of moderate rainfall.
In May, the humidity in Mariehamn, Åland Islands begins to show a refreshing decline, dipping to 77% from the higher levels seen in the preceding months. This reduction signals the transition into warmer summer days, offering a more comfortable atmosphere for outdoor activities. While January through April maintain high humidity levels—hovering around the 85% mark or above—May paves the way for the drier months ahead, as June and July experience even lower humidity levels at 76% and 74%, respectively. This gradual decrease not only enhances the vibrancy of the beautiful Åland landscapes but also invites both residents and visitors to embrace the springtime charm.
As May unfolds in Mariehamn, Åland Islands, the UV Index rises noticeably, reaching 5, which marks a shift to a moderate exposure category. This increase from April's 4 highlights the approaching summer and calls for mindfulness regarding sun safety. With a burn time of just 30 minutes, it’s essential for residents and visitors to take precautions such as wearing sunscreen, sunglasses, and protective clothing to enjoy the sunny days responsibly. The trend from the earlier months reveals a steady progression from low to moderate UV levels, paving the way for the high indices of June and July. For more detailed information on UV levels throughout the year, check out Mariehamn UV Index.
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In Mariehamn, Åland Islands, May marks a significant turning point in sunshine hours, basking in an impressive 457 hours of radiant sunlight. As spring unfolds, this month experiences a remarkable leap in daylight, following April's 368 hours, reflecting the longer days and clear skies typical of late spring. The trend continues as the summer months approach, with June and July surpassing May, yet May remains a cherished gem, full of lush landscapes and vibrant blooms fueled by the sun's warm embrace. This month not only heralds the arrival of summer but also serves as a reminder of the increasing brightness that will soon envelop the islands, inviting both locals and visitors to revel in the enchanting beauty of the outdoors.
In Mariehamn, Åland Islands, the transition to sunnier days is palpable as spring unfolds. **May typically boasts a 33% chance of sunny weather, a notable drop from the previous month's higher likelihood of 52%. This fluctuation reflects the unpredictable nature of early seasonal shifts, where lingering clouds may still compete with the emerging sun. As summer approaches in June, the probability of sunshine significantly increases to 56%, marking the onset of brighter, more stable weather patterns. While May may not offer the sunniest skies, it certainly paves the way for the sunnier months ahead, making it a transitional gem in the annual weather cycle.
In the enchanting Mariehamn, Åland Islands, the month of May ushers in a delightful transition with an impressive 17 hours of daylight, marking a significant increase from the 14 hours seen in April. As spring advances, the days grow noticeably longer, highlighting a trend that peaks in June when daylight reaches its maximum at 18 hours. This extended sunlight not only brightens the landscape but also invites residents and visitors alike to revel in outdoor activities and enjoy the natural beauty of the islands. In contrast, the year begins with limited daylight, featuring just 6 hours in January, gradually awakening as the months progress. This seasonal shift showcases the gradual embrace of summer, making May a particularly vibrant time in Mariehamn, where each day feels increasingly filled with life and light.
In Mariehamn, Åland Islands, the month of May ushers in a noticeable shift in wind patterns, with average wind speeds dropping to 5.3 m/s (12 mph), the lowest for the year. This gentle breeze contrasts sharply with the blustery conditions experienced during the earlier months, particularly March and October, when winds peak at 7.7 m/s (17 mph) and 9.1 m/s (20 mph), respectively. As spring unfolds, the calmer winds create a more serene atmosphere, perfect for enjoying outdoor activities amid the blooming scenery. Notably, the transition from April’s 6.8 m/s (15 mph) to May’s lighter gusts signals the arrival of summer vibes, encouraging the inhabitants and visitors alike to embrace the leisurely pace of life in this beautiful archipelago.
Weather in Mariehamn varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Mariehamn, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between May and January, it's clear that May offers much milder temperatures, with averages around 7°C (45°F) and highs reaching up to 15°C (59°F). In contrast, January experiences much colder conditions, with average temperatures hovering around 1°C (35°F) and lows plummeting to -8°C (17°F). Additionally, May sees less precipitation at 36 mm (1.4 in) over approximately 6 days, whereas January has more frequent rain or snow, totaling 48 mm (1.9 in) over about 11 days. Humidity levels are also higher in January at 90%, compared to 77% in May, contributing to the overall chill of the winter month. For those interested in more details, check out Mariehamn weather in January.
When comparing the weather in May and February, we see a significant contrast in temperatures and conditions. In May, temperatures range from a minimum of 1°C (33°F) to a maximum of 15°C (59°F), with an average of 7°C (45°F), creating a mild atmosphere as spring settles in. In contrast, February presents a much colder climate, with temperatures dropping as low as -10°C (14°F) and averaging around 0°C (33°F). This month also experiences slightly more precipitation, totaling 38 mm (1.5 in) over 10 days, compared to May's 36 mm (1.4 in) over just 6 days. Furthermore, February's humidity is higher at 88%, compared to May's 77%, adding to the chilliness of the winter air. For a more detailed look at February conditions, you can visit Mariehamn weather in February.
Comparing the weather in May and March reveals a significant shift in temperature and conditions. In March, temperatures range from a chilly -10°C (14°F) to a maximum of 9°C (48°F), with an average of 1°C (35°F), while May sees much milder conditions, with temperatures varying from 1°C (33°F) to 15°C (59°F) and an average of 7°C (45°F). Precipitation is slightly higher in March, totaling 37 mm (1.5 in) over 9 days, compared to 36 mm (1.4 in) over 6 days in May. Additionally, March exhibits higher humidity levels at 89%, while May has a more comfortable humidity of 77%. For a more detailed look at March's conditions, you can visit Mariehamn weather in March.
In comparing the weather between April and May, May shows a noticeable increase in temperature, with minimums of 1°C (33°F) compared to April's -1°C (30°F) and an average of 7°C (45°F) versus April's 3°C (38°F). The maximum temperatures in May also reach 15°C (59°F), significantly warmer than April's highest of 9°C (48°F). Although May experiences slightly less precipitation at 36 mm (1.4 in) over 6 days, compared to April's 24 mm (1.0 in) over 7 days, the humidity remains quite high in both months, with May at 77% and April at 85%. For more details on the weather patterns in April, you can visit Mariehamn weather in April.
May and June exhibit a notable shift in weather patterns. In May, temperatures range from a chilly minimum of 1°C (33°F) to a maximum of 15°C (59°F), with an average of 7°C (45°F). The month experiences moderate precipitation of 36 mm (1.4 in) over about 6 days, coupled with relatively high humidity at 77%. In contrast, June sees warmer temperatures, with a minimum of 7°C (44°F) and a maximum reaching 21°C (70°F), resulting in a more comfortable average of 13°C (56°F). Additionally, June boasts slightly less precipitation at 29 mm (1.1 in), occurring over just 4 days, with humidity dropping slightly to 76%. For a more detailed overview, check out Mariehamn weather in June.
May and July exhibit notable differences in weather patterns. In May, temperatures range from a chilly 1°C (33°F) to a milder 15°C (59°F), with an average of 7°C (45°F). The month sees around 36 mm (1.4 in) of precipitation over 6 days, contributing to a humid environment with 77% humidity. In contrast, July experiences a significant warm-up, with temperatures spanning from a minimum of 11°C (53°F) to a comfortable maximum of 24°C (75°F) and an average of 17°C (63°F). While July receives slightly more precipitation at 45 mm (1.8 in) over 7 days, the humidity drops to 74%, making it feel less sticky than May. For more details, visit Mariehamn weather in July.
In May, temperatures range from a chilly minimum of 1°C (33°F) to a pleasant maximum of 15°C (59°F), with an average of 7°C (45°F). The month experiences relatively light precipitation, totaling 36 mm (1.4 in) over about 6 days, while humidity remains at 77%. In contrast, August sees significantly warmer weather, with temperatures ranging from a minimum of 13°C (55°F) to a comfortable maximum of 23°C (74°F) and an average of 17°C (63°F). However, it brings more rainfall, accumulating 53 mm (2.1 in) over approximately 10 days, still at 77% humidity. For more details, you can check the local conditions for the month with Mariehamn weather in August.
In May, the weather is cooler, with temperatures ranging from a minimum of 1°C (33°F) to a maximum of 15°C (59°F) and an average of 7°C (45°F). The month sees about 36 mm (1.4 in) of precipitation over six days and has a humidity level of 77%. In contrast, September experiences milder temperatures, with lows around 8°C (46°F), highs reaching 20°C (68°F), and an average of 14°C (57°F). However, it is also wetter, receiving 56 mm (2.2 in) of rain spread over eleven days, alongside a higher humidity at 85%. For more insights into September weather, you can visit Mariehamn weather in September.
In May, temperatures in Mariehamn range from a chilly minimum of 1°C (33°F) to a pleasant maximum of 15°C (59°F), with an average of 7°C (45°F). This month sees relatively low precipitation of 36 mm (1.4 in) over about 6 days, with humidity levels at 77%. In contrast, October brings slightly warmer minimum temperatures of 3°C (37°F) and a consistent maximum of 15°C (59°F), but the average rises to 9°C (49°F). Rainfall increases significantly, with 90 mm (3.6 in) spread across 17 days and humidity climbing to 89%. The change in weather patterns reflects a transition from spring's freshness to autumn's dampness. For more detailed insights, check out Mariehamn weather in October.
May and November present quite different weather conditions. In May, temperatures range from a chilly 1°C (33°F) at night to a pleasant 15°C (59°F) during the day, with an average of 7°C (45°F) and relatively low precipitation of 36 mm (1.4 in) over about 6 days, leading to a humidity level of 77%. In contrast, November experiences colder nights with temperatures dropping to -2°C (29°F) and a slightly cooler average of 6°C (43°F). The month is wetter, with 57 mm (2.2 in) of precipitation spread over 14 days, resulting in a higher humidity of 90%. For more insights into the November climate, check out Mariehamn weather in November.
May and December present stark contrasts in weather conditions. May typically features milder temperatures, with average highs reaching up to 15°C (59°F) and only a low of 1°C (33°F). It sees relatively low precipitation, averaging 36 mm (1.4 in) over about six days, along with a humidity level of 77%. In comparison, December experiences much colder temperatures, with an average high of only 7°C (46°F) and lows plunging to -8°C (19°F). The month is significantly wetter, receiving about 80 mm (3.1 in) of precipitation across 18 days and a higher humidity of 87%. For more detailed information, you can check Mariehamn weather in December.
As spring unfolds in Mariehamn, May brings a refreshing change from the lingering chill of winter. With temperatures reaching a comfortable maximum of 15°C (59°F), this month showcases a delightful increase in warmth compared to the cooler months. While average temperatures linger around 7°C (45°F), the crisp air still holds a hint of freshness, inviting residents and visitors to enjoy the beauty of nature. The 36 mm of precipitation over about six days suggests a typical spring pattern, ensuring that the landscape remains vibrant and lush. Overall, May's 77% humidity adds a soft touch to the air, making it a transitional month full of promise for both the flora and those who experience it. For more insights on the seasonal variations, check out Mariehamn Climate.