Last updated: August 21, 2025
October in Mariehamn, Åland Islands is characterized by a cool and damp climate, with average temperatures hovering around 9°C (49°F). Daily highs can reach a maximum of 15°C (59°F), while nights trickle down to a brisk low of 3°C (37°F). This month witnesses significant precipitation, totaling about 90 mm (3.6 in) over approximately 17 days, contributing to a high humidity level of 89%. As the leaves change colors and the air turns crisp, October is a prime time for experiencing the serene beauty of the Åland Islands, despite the frequent rain showers.
In October, Mariehamn, Åland Islands, transitions into cooler autumn weather, marked by average temperatures hovering around 9°C (49°F). The month starts with minima of 3°C (37°F) and peaks at a comfortable 15°C (59°F), providing a refreshing contrast to the warmer summer months that precede it. As daylight fades and the leaves begin to change, the region gradually bids farewell to the lingering warmth of September, which had seen temperatures reaching up to 20°C (68°F). This month's milder conditions invite both locals and visitors to enjoy outdoor adventures amidst the stunning fall foliage, making October a beautiful time to experience the serene charm of Mariehamn.
October brings a significant increase in precipitation to Mariehamn, Åland Islands, with an average of 90 mm (3.6 in) of rain falling over 17 days. This marks a notable rise compared to the drier summer months, reflecting the transition into autumn. While July and August see lighter showers totaling 45 mm (1.8 in) and 53 mm (2.1 in) respectively, September begins to ramp up with 56 mm (2.2 in) over 11 days, setting the stage for October’s peak. The increase in rainy days signals a shift towards a more unsettled climate as temperatures cool and the region prepares for winter. This trend establishes October as a pivotal month for precipitation in Mariehamn, making it a particularly wet time in the annual cycle.
In October, the humidity in Mariehamn, Åland Islands climbs back to 89%, marking a noticeable rise from the drier summer months. This increase brings the levels in line with the higher humidity of late winter and early spring, where figures hover around 90% and 89%. The transition into autumn is characterized by this surge, reflecting the region's coastal climate and the onset of cooler days. Following a dip in humidity during the warmer months, October serves as a reminder of the approaching winter, as air moisture begins to rebound, making the atmosphere feel crisp yet enveloping. The cyclical pattern of humidity showcases Mariehamn's unique climatic rhythm, emphasizing the interplay between seasonal changes and atmospheric conditions.
As October rolls into Mariehamn, Åland Islands, the UV Index drops to a low 2, marking a shift towards safer sun exposure following the higher values of summer. This month, residents and visitors can enjoy up to 45 minutes of sun without the risk of burning, similar to the winter months of January and February. After experiencing a peak in the summer with UV readings hitting 7 in June and July, October's moderate UM exposure is a gentle reminder to embrace the softer light of autumn. With a comfortable burn time and a lower exposure category, it's an ideal time for leisurely outdoor activities while still being mindful of the sun. For more insights on UV levels year-round, check out the Mariehamn UV Index.
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Amidst the vibrant autumn hues, October in Mariehamn, Åland Islands, offers a delightful transition into the cooler months, with an impressive 216 hours of sunshine. This marks a significant dip compared to the sun-drenched summer months, where July enjoys the highest sunshine at 493 hours. As the days shorten, October still holds onto a substantial amount of sunshine, making it the third sunniest month of the year, following the relentless brightness of June and July. The fluctuating hours reflect the gradual shift from the exuberance of summer to the tranquil embrace of late autumn, inviting visitors to bask in the golden glow as the landscape prepares for the winter ahead.
In October, the chances of enjoying sunny weather in Mariehamn, Åland Islands, dip to 23%, marking a noticeable decline as the year transitions into the cooler months. This trend reflects a significant drop from the brighter summer months, peaking in July with a 62% chance of sunshine. As autumn progresses, the likelihood of sunny days decreases from 39% in August to 31% in September, ultimately reaching the October figure. The gradual reduction in sun exposure not only signals the impending winter but also emphasizes the charming, moody atmosphere that envelops Mariehamn during this time of year.
As October rolls in, daylight hours in Mariehamn, Åland Islands take a noticeable dip, offering around 10 hours of light each day. This marks a shift from the vibrant summer months, where June boasts the longest days at an impressive 18 hours. The gradual decline in daylight begins in late summer, with July and August still enjoying 17 and 15 hours, respectively, while September ushers in shorter days with just 12 hours. The trend is clear: as the chill of autumn settles in, the warm glow of daylight wanes, leading the way to the long, dark winter months ahead. With just 7 hours expected in November and a mere 5 hours by December, the transition is marked by the slowing descent of the sun, inviting residents to embrace cozy evenings indoors.
As the seasons transition, October in Mariehamn, Åland Islands brings a noticeable surge in wind speed, averaging 9.1 m/s (20 mph), marking it as one of the breeziest months of the year. This uptick follows a steady decline from the gentle breezes of summer, where July and August saw average speeds just above 5 m/s. While September maintained this calm at 6.8 m/s, October's winds signal a shift towards the blustery conditions typical of late autumn. With a jump to over 9 m/s, the wind provides a robust reminder of nature's transition, invigorating the island's ambiance and inviting adventurous spirits to embrace the elements.
Weather in Mariehamn varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Mariehamn, focusing on differences in temperature, rainfall, humidity, and UV levels.
October and January present stark contrasts in weather, with October enjoying milder temperatures ranging from 3°C (37°F) to a maximum of 15°C (59°F), while January plunges into chillier conditions, with temperatures dipping as low as -8°C (17°F) and averaging just 1°C (35°F). Additionally, October experiences higher precipitation levels, with about 90 mm (3.6 in) over 17 days, compared to January's relatively drier conditions, which see 48 mm (1.9 in) spread over 11 days. Both months have high humidity levels, but January's frostier air can make the cold feel more biting. For a closer look at what to expect, check out Mariehamn weather in January.
October and February present strikingly different weather patterns. In October, temperatures range from a minimum of 3°C (37°F) to a maximum of 15°C (59°F), with an average of 9°C (49°F). The month sees considerable precipitation, totaling 90 mm (3.6 in) over approximately 17 days, and a high humidity level of 89%. In contrast, February experiences much colder conditions, with temperatures dipping as low as -10°C (14°F) and peaking at just 7°C (44°F), resulting in an average temperature of 0°C (33°F). Precipitation in February is significantly lower, at 38 mm (1.5 in) and occurring over about 10 days, with humidity close to that of October at 88%. To learn more about the weather specifics in February, visit Mariehamn weather in February.
Comparing the weather in October and March reveals significant contrasts. In October, temperatures range from a minimum of 3°C (37°F) to a maximum of 15°C (59°F), with an average of 9°C (49°F). The month sees considerable rainfall, accumulating to 90 mm (3.6 in) over approximately 17 days, maintaining a high humidity level of 89%. In contrast, March experiences colder temperatures, with a minimum of -10°C (14°F) and an average of just 1°C (35°F), reaching up to 9°C (48°F). Precipitation is notably lower in March, totaling 37 mm (1.5 in) over about 9 days, while humidity remains the same at 89%. For more details on the weather in March, you can check out Mariehamn weather in March.
When comparing the weather in October and April, it's clear that October tends to be milder overall. In October, temperatures range from a minimum of 3°C (37°F) to a maximum of 15°C (59°F), while April experiences slightly cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 9°C (48°F). Additionally, October sees significantly higher precipitation, totaling 90 mm (3.6 in) over 17 days, compared to April's 24 mm (1.0 in) over just 7 days. Both months feature high humidity, but October is slightly more humid at 89%, compared to April's 85%. For more details on April's specific weather patterns, you can visit Mariehamn weather in April.
When comparing the weather in October and May, a few key differences emerge. October experiences a slightly higher average temperature of 9°C (49°F), while May cools down to an average of 7°C (45°F). Both months share the same maximum temperature of 15°C (59°F), but October's minimum temperature is a bit milder at 3°C (37°F) compared to May's 1°C (33°F). Precipitation is significantly greater in October, with 90 mm (3.6 in) over 17 days, whereas May sees only 36 mm (1.4 in) in just 6 days. Additionally, humidity levels in October are higher at 89%, compared to May's 77%. For more specific details about weather conditions in May, you can visit Mariehamn weather in May.
In comparing the weather of October and June, it's clear that June offers a milder and more pleasant climate, with average temperatures ranging from a minimum of 7°C (44°F) to a maximum of 21°C (70°F). In contrast, October experiences cooler temperatures, averaging between 3°C (37°F) and 15°C (59°F). Additionally, June has significantly less precipitation, totaling only 29 mm (1.1 in) over 4 days, whereas October sees much wetter conditions with 90 mm (3.6 in) of rain spread across 17 days, accompanied by higher humidity levels of 89% compared to June's 76%. For a more in-depth look at the weather in June, you can visit Mariehamn weather in June.
In contrasting the weather between October and July, October tends to be significantly cooler with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 15°C (59°F) and an average of 9°C (49°F). In contrast, July boasts much warmer temperatures, with a minimum of 11°C (53°F) and a maximum of 24°C (75°F), averaging 17°C (63°F). Additionally, October experiences much higher precipitation, totaling 90 mm (3.6 in) over 17 days, compared to July's 45 mm (1.8 in) over just 7 days. The humidity also differs notably, with October's humidity at 89% compared to July's 74%. For more details on July's weather, visit Mariehamn weather in July.
In comparing the weather of October with August, October presents a significant drop in temperatures, with minimums reaching as low as 3°C (37°F) and averages around 9°C (49°F), while August enjoys milder conditions with minimums of 13°C (55°F) and average temperatures of 17°C (63°F). Precipitation levels also increase in October, totaling 90 mm (3.6 in) over about 17 days, compared to August's more moderate 53 mm (2.1 in) over 10 days. Additionally, humidity in October is higher at 89%, creating a damp chill, whereas August's humidity is more comfortable at 77%. For those looking for more detailed insights, you can visit Mariehamn weather in August.
In comparing the weather of October and September, October tends to be cooler, with average temperatures ranging from a minimum of 3°C (37°F) to a maximum of 15°C (59°F), compared to September's milder temperatures, which range from 8°C (46°F) to 20°C (68°F). Additionally, October experiences more precipitation, totaling 90 mm (3.6 in) over 17 days, while September has less rainfall at 56 mm (2.2 in) across 11 days. Humidity also rises slightly in October, averaging 89%, versus September's 85%. For more detailed weather insights for September, you can check Mariehamn weather in September.
October and November exhibit notable differences in weather patterns. In October, temperatures range from a minimum of 3°C (37°F) to a maximum of 15°C (59°F), with an average of 9°C (49°F). The month is relatively wet, recording 90 mm (3.6 in) of precipitation over 17 days and maintaining a high humidity level of 89%. In contrast, November brings colder temperatures, with a minimum of -2°C (29°F), an average of 6°C (43°F), and a maximum of 13°C (55°F). Although it is cooler, November experiences less rainfall, at 57 mm (2.2 in) over 14 days, while humidity remains slightly higher at 90%. For more details on November weather, visit Mariehamn weather in November.
In October, the weather is generally milder, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 15°C (59°F), and an average temperature of 9°C (49°F). This month experiences considerable precipitation, with about 90 mm (3.6 in) falling over 17 days, and humidity levels are quite high at 89%.
Conversely, December brings colder conditions, with temperatures dipping to a minimum of -8°C (19°F) and an average temperature of just 3°C (37°F). The maximum temperature is a mere 7°C (46°F), and while December sees slightly less precipitation than October at 80 mm (3.1 in) over 18 days, humidity remains high at 87%. For more insights, you can visit Mariehamn weather in December.
As October unfolds in Mariehamn, the warmth of early autumn begins to fade, making way for cooler temperatures and an increase in precipitation. With an average temperature that hovers around 9°C (49°F), this month brings a notable chill compared to the milder days of summer. Rainy spells are common, with about 17 days receiving precipitation, contributing to a higher humidity level of 89%. This shift not only accentuates the crisp air but also transforms the landscape, setting the stage for a picturesque autumn. For a detailed look at what to expect throughout the year, check out Mariehamn Climate.