Last updated: August 21, 2025
Experience the unique charm of Mariehamn, Åland Islands during the month of January. Visitors can expect temperatures ranging from a brisk -8°C (17°F) at night to a mild 8°C (46°F) during the day, with an average temperature settling around 1°C (35°F). The region sees an average precipitation of 48 mm (1.9 in), spread across 11 days, contributing to the serene winter landscape, while high humidity levels at 90% create a distinct atmospheric ambiance. Embrace the beauty of winter as snow-capped scenery and crisp air invite exploration and enjoyment of this tranquil island setting.
In Mariehamn, Åland Islands, January presents a crisp start to the year, with temperatures ranging from a chilly -8°C (17°F) to a mild 8°C (46°F), averaging around 1°C (35°F). This month often sets the tone for winter, characterized by its frosty mornings and the occasional thaw that nudges the mercury upward. As winter progresses into February, the cold deepens slightly, with minimum temperatures dropping to -10°C (14°F), while the averages hover near 0°C (33°F). By March, though still chilly, a gradual warming trend begins, hinting at the approaching spring. As temperatures fluctuate, the maximums can reach up to 9°C (48°F), showcasing a consistent rise that continues into April. Notably, temperatures leap from a wintry chill in January to a refreshing mildness by late spring, illustrating the gradual transition from icy conditions to the budding warmth of May. Overall, January captures the essence of winter's embrace, leading into the promise of renewal in the months to come.
In January, Mariehamn, Åland Islands, experiences a precipitation total of 48 mm (1.9 in) over 11 days, marking it as one of the wetter months of the year. This rainfall sets the tone for the winter season, with a noticeable dip in both precipitation amount and frequency as the calendar progresses into spring. February follows closely behind with 38 mm (1.5 in) across just 10 days, hinting at a gradual reduction in moisture. The trend continues into March, where a modest 37 mm (1.5 in) is recorded, illustrating the transition towards milder conditions. As the months warm, overall precipitation decreases significantly, particularly in April and May, where figures drop to 24 mm (1.0 in) and 36 mm (1.4 in)**, respectively. This shift not only signifies the onset of spring but also highlights how summer months bring varied and often heavier rainfall, culminating in the wetter autumn months that see a sharp increase in both precipitation and rainy days.
In January, Mariehamn experiences a notably high humidity level at 90%, contributing to the chilly, crisp air of winter. This elevated moisture in the air persists into November, maintaining a consistent 90%, while it gradually dips to 88% in February and 89% in March. As the seasons transition, humidity levels begin to decline from April onwards, reaching their lowest point in July at 74%. However, a slight uptick is seen as summer wanes into autumn, with September rebounding to 85% and back up to 89% in October. Ultimately, Mariehamn's climate showcases a winter-to-summer humidity trend where peak levels are met in the coldest months, only to soften as the year progresses toward warmer seasons.
In January, Mariehamn experiences a low UV Index of 1, with a safe burn time of 45 minutes under the sun. This trend of low UV levels persists into February, maintaining the same index and burn time, ensuring a gentle start to the year for outdoor enthusiasts. As spring approaches, the index begins to rise; by March, it reaches 3, indicating moderate exposure and reducing the burn time to 30 minutes. This gradual increase continues through April and May, where the UV Index climbs to 4 and 5 respectively, still categorized as moderate but requiring attention to sun protection. Come June and July, the UV Index peaks at 7, signifying high exposure levels and significantly reducing safe sun exposure to just 25 minutes. As summer wanes into August and September, the index falls back to 5 and 4, requiring a more cautious approach once again. By the time the year wraps up in October through December, UV levels drop back to low indexes of 2 and 1, with burn times returning to 45 minutes. These fluctuations highlight the importance of adjusting sun protection strategies throughout the year. For more information, visit Mariehamn UV Index.
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In Mariehamn, the Åland Islands, January marks the beginning of the year with a modest 66 hours of sunshine, setting a gentle tone as winter lingers. As the months progress, daylight surges dramatically, with February delivering 161 hours—a clear sign of the approaching spring. The sun continues to shine more brightly in March and April, boasting 272 and 368 hours respectively, as the landscape awakens from its frosty slumber. The height of summer peaks in July, where daylight reaches its zenith with an impressive 493 hours, enticing residents and visitors to bask in the glow. However, as August fades back to 425 hours, and autumn takes hold, sunshine gradually diminishes, leaving November with just 134 hours before the year concludes in December with a mere 73 hours. This journey through the months reveals a clear trend of increasing sunlight, highlighting the Åland Islands as a radiant destination that shifts beautifully with the seasons.
In January, the chance of sunny weather in Mariehamn, Åland Islands is a modest 8%, marking the month as one of the gloomiest in terms of sunshine. This trend of limited sun exposure begins to shift in February, when the likelihood increases to 25%, suggesting a slow but steady transition toward brighter days. By March, this figure rises further to 33%, as the days start to lengthen and the sun makes more frequent appearances. The warming trend continues through the spring, with April seeing a significant jump to 52% sunshine. As we move into the summer months, the chance of sunny weather peaks, particularly in July at 62%, making it the sunniest month of the year. Thus, while January may feel dreary, it sets the stage for a gradual increase in sunlight that unfolds beautifully as the seasons progress.
In Mariehamn, Åland Islands, the daylight duration undergoes a remarkable transformation throughout the year. In January, residents experience a mere 6 hours of daylight, gradually increasing to 9 hours by February. As spring approaches, daylight stretches to 11 hours in March and continues to grow, reaching an impressive 14 hours in April. The peak arrives in June with 18 hours of sunlight, creating long, bright days perfect for enjoying the outdoors. However, as summer fades, a gentle decline begins: July brings 17 hours, followed by 15 hours in August, and then gradually down to 12 hours in September. The transition into autumn is marked by a quicker decrease, resulting in only 10 hours by October and a bare 5 hours by December, closing the year with the shortest days. This rhythmic ebb and flow of daylight captivates both residents and visitors alike, reflecting the enchanting seasonal shifts of the region.
In January, Mariehamn experiences an average wind speed of 7.6 m/s (17 mph), setting the stage for the winter months. This brisk pace is echoed in February, where the winds remain steady at 7.4 m/s, before a slight uptick in March to 7.7 m/s, suggesting a fierce transition as spring approaches. As the year progresses into April and May, a noticeable decline occurs with winds dropping to 6.8 m/s and 5.3 m/s, respectively, bringing a more tranquil atmosphere. The gentle breezes continue through June and July, reaching their calmest point at 4.8 m/s in June, before gradually picking up again in the late summer months. The arrival of autumn spices things up, peaking in October at 9.1 m/s, a notable contrast to the calmer spring and summer months, before settling into a consistent rhythm of 7.8 m/s in November and 7.9 m/s in December. This ebb and flow of wind speeds not only characterizes the seasons but also paints a vivid picture of life in the enchanting Åland Islands.
Weather in Mariehamn varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Mariehamn, focusing on differences in temperature, rainfall, humidity, and UV levels.
January and February in Mariehamn present a chilly winter landscape, but there are subtle differences between the two months. January tends to be slightly warmer with average temperatures around 1°C (35°F), while February experiences a cooler average of 0°C (33°F). The minimum temperatures in January dip to -8°C (17°F), whereas February sees a sharper drop to -10°C (14°F). Precipitation levels are somewhat lower in February at 38 mm (1.5 in), compared to January's 48 mm (1.9 in), with both months featuring around 10 to 11 rainy days. Humidity remains high in both months, with January at 90% and February slightly less at 88%. For more details, you can check Mariehamn weather in February.
Comparing the weather in January and March, we see some notable similarities and slight differences. In January, the minimum temperature dips to -8°C (17°F), while in March it can get slightly colder, reaching -10°C (14°F), although both months share an average temperature of 1°C (35°F). Precipitation is slightly higher in January with 48 mm (1.9 in) over 11 days compared to March's 37 mm (1.5 in) over 9 days. Humidity levels remain quite similar as well, with January at 90% and March at 89%. For more detailed information on March weather conditions, you can visit Mariehamn weather in March.
January and April in Mariehamn present a clear contrast in weather patterns. January temperatures are generally colder, with average lows around -8°C (17°F) and average highs peaking at 8°C (46°F), while April sees a slight warming trend, with averages ranging from -1°C (30°F) to 9°C (48°F). Precipitation is more frequent in January, occurring on 11 days and accumulating 48 mm (1.9 in), compared to April's 7 days of rain and a total of 24 mm (1.0 in). Additionally, January's humidity is slightly higher at 90%, in contrast to April’s 85%. For a more detailed look at the weather in April, visit Mariehamn weather in April.
In January, the weather is notably colder, with temperatures ranging from a brisk -8°C (17°F) to a maximum of 8°C (46°F), accompanied by high humidity levels of 90%. The month experiences an average precipitation of 48 mm (1.9 in) over 11 days, making it a time when the chill is palpable. In contrast, May sees a significant warming trend, with temperatures starting at a minimum of 1°C (33°F) and reaching an average of 7°C (45°F), peaking at 15°C (59°F). The precipitation decreases to 36 mm (1.4 in) over just 6 days, and humidity drops to a more comfortable 77%. For more detailed insights into May's weather, you can explore Mariehamn weather in May.
January and June present stark contrasts in weather. In January, temperatures can plunge to a minimum of -8°C (17°F), with an average of just 1°C (35°F) and a maximum of 8°C (46°F). This winter month also sees significant humidity at 90%, contributing to a chilly atmosphere with 48 mm (1.9 in) of precipitation over 11 days. In comparison, June brings a more pleasant climate with minimum temperatures of 7°C (44°F), an average of 13°C (56°F), and highs reaching 21°C (70°F). The month is much drier, with only 29 mm (1.1 in) of precipitation over just 4 days, and the humidity falls to a more comfortable 76%. For a detailed look at conditions, check out Mariehamn weather in June.
When comparing the weather in January and July, a stark contrast emerges. January is characterized by frigid temperatures, with a low of -8°C (17°F) and an average around 1°C (35°F), making it a chilly month with consistent precipitation occurring on 11 days. The humidity level hovers at a high 90%, contributing to the wintery feel. In contrast, July brings much warmer conditions, where temperatures range from a minimum of 11°C (53°F) to a pleasant maximum of 24°C (75°F), coupled with an average of 17°C (63°F). Precipitation is slightly lower, occurring over just 7 days, and the humidity drops to a more comfortable 74%. For more details on summer weather, visit Mariehamn weather in July.
In January, the weather in Mariehamn is quite chilly, with temperatures ranging from a frigid -8°C (17°F) at night to a mild 8°C (46°F) during the day, while the average sits around 1°C (35°F). The month sees approximately 48 mm (1.9 in) of precipitation over 11 days, accompanied by high humidity levels at 90%. In contrast, August brings a noticeable warmth, with temperatures varying from a comfortable minimum of 13°C (55°F) to a pleasant maximum of 23°C (74°F), averaging 17°C (63°F). Despite slightly higher precipitation at 53 mm (2.1 in) over just 10 days, humidity drops to a more comfortable 77%. For a more detailed overview of conditions during this vibrant summer month, check out Mariehamn weather in August.
January and September present quite contrasting weather conditions. In January, temperatures can drop as low as -8°C (17°F), with an average of 1°C (35°F) and a maximum of 8°C (46°F), creating a cold and crisp atmosphere. The month experiences significant humidity at 90% and receives around 48 mm (1.9 in) of precipitation over 11 days. In contrast, September enjoys milder temperatures, with a minimum of 8°C (46°F), an average of 14°C (57°F), and a comfortable maximum of 20°C (68°F). Although it still experiences precipitation over 11 days, September sees a bit more rainfall at 56 mm (2.2 in) and a slightly lower humidity of 85%. For a more detailed look, check out the Mariehamn weather in September.
January and October present contrasting weather patterns. In January, the temperatures are significantly colder, with a minimum of -8°C (17°F) and an average of 1°C (35°F), while October enjoys milder conditions, ranging from a minimum of 3°C (37°F) to an average of 9°C (49°F). Precipitation is also more pronounced in October, with 90 mm (3.6 in) falling over 17 days compared to January's 48 mm (1.9 in) over just 11 days. Both months feature high humidity, with October slightly drier at 89% compared to January's 90%. For more details on October's weather, you can visit Mariehamn weather in October.
When comparing the weather between January and November, we observe notable differences. January typically experiences colder temperatures, with a minimum of -8°C (17°F) and an average of only 1°C (35°F), while November is milder, showing a minimum of -2°C (29°F) and an average of 6°C (43°F). Precipitation in November is slightly higher, totaling 57 mm (2.2 in) over about 14 days, compared to 48 mm (1.9 in) across 11 days in January. Both months have a consistent humidity level of 90%, contributing to a damp and chilly atmosphere. For additional details, you can check out Mariehamn weather in November.
In January, temperatures typically range from a minimum of -8°C (17°F) to a maximum of 8°C (46°F), with an average of 1°C (35°F). The month experiences about 48 mm (1.9 in) of precipitation over approximately 11 days, with humidity levels around 90%. In contrast, December has similar minimum temperatures at -8°C (19°F) but boasts a slightly warmer average of 3°C (37°F) and a maximum of 7°C (46°F). This month sees more precipitation, totaling 80 mm (3.1 in) over approximately 18 days, and a slightly lower humidity of 87%. For more details on December weather, you can visit Mariehamn weather in December.
In January, Mariehamn experiences a notable chill that sets it apart from other months, with average temperatures hovering around 1°C and a stark minimum that can plummet to -8°C. The high humidity, reaching 90%, coupled with frequent precipitation over 11 days, brings a distinctive dampness to the air, making it feel even colder. This month is characterized by a mix of wintry weather, where occasional milder days can surprise residents and visitors alike. For those curious about the nuances of Mariehamn's climate throughout the year, delve into the detailed insights provided in Mariehamn Climate.