Last updated: August 21, 2025
Experience the charm of Mariehamn, Åland Islands, in August, where summer lingers with an inviting average temperature of 17°C (63°F). Enjoy delightful warmth as daily highs can reach up to 23°C (74°F), perfect for exploring the picturesque landscapes. While the weather is generally pleasant, anticipate some rain with 53 mm (2.1 in) of precipitation spread over 10 days, adding a refreshing touch to the lush surroundings. With humidity at a comfortable 77%, August in Mariehamn offers a balance of warmth and cool breezes, making it an ideal time to discover this enchanting destination.
In August, Mariehamn embraces the warmth of summer, with temperatures reaching a pleasant average of 17°C (63°F). The month starts with a mild minimum of 13°C (55°F) and peaks at a comfortable 23°C (74°F), making it an ideal time for outdoor activities and enjoying the natural beauty of the Åland Islands. This trend marks a clear upward shift from the cooler months earlier in the year, with August's warmth providing a delightful contrast to the chill of January's minimum of -8°C (17°F). As summer transitions into autumn, temperatures begin to slide, but August stands out as a month of enjoyable warmth, perfect for both locals and visitors to soak up the sun.
In August, Mariehamn, Åland Islands experiences a notable increase in precipitation, with 53 mm (2.1 in) falling over 10 days. This uptick marks a shift from the drier summer months, reflecting the transition into the wetter autumn season. Compared to July's 45 mm, the heightened August rainfall prepares the landscape for September’s even wetter pattern, averaging 56 mm over the same number of precipitation days. The trend is clear: as summer gives way to fall, the frequency and intensity of rainfall rise, underscoring the region's dynamic climate.
In August, humidity in Mariehamn, Åland Islands settles at a comfortable 77%, marking a slight increase from the drier months of July (74%) and June (76%). As summer winds down, the air begins to feel more refreshing, reminiscent of the moist air typical in the earlier months of the year, with January and February peaking at 90% and 88% respectively. This transition illustrates a notable drop in humidity during late spring and summer months, before the levels rise again heading into autumn. The lush and vibrant landscapes of the islands are beautifully complemented by this shift, offering a pleasant climatic experience for both residents and visitors in August.
As summer wanes in August, Mariehamn experiences a moderate UV Index of 5, providing the perfect opportunity to enjoy the outdoors while still being mindful of sun exposure. After the high levels reached in June and July, where the UV Index peaked at 7, the slight dip to a UV Index of 5 means that while you should continue to practice sun safety, the burn time extends back to 30 minutes, allowing for more leisurely enjoyment under the sun. This trend highlights a gradual easing of intensity as the seasons transition, making it essential for residents and visitors alike to stay informed about local conditions. For more detailed information on UV exposure, check out Mariehamn UV Index.
UV Risk Categories
In August, Mariehamn basks in the warm glow of approximately 425 hours of sunshine, marking a delightful transition from the peak of summer. This month showcases a vibrant tapestry of light, complementing July's impressive 493 hours while still outshining September's decline to 318 hours. As the sun begins its gradual retreat towards autumn, the sunshine in August serves as a reminder of the long, bright days of summer, where residents and visitors alike can revel in the lingering warmth and outdoor festivities. The trend illustrates a steady ascent from the bleakness of winter with 66 hours in January, culminating in a radiant mid-year peak, before the gradual dimming as autumn approaches.
In Mariehamn, Åland Islands, August sees a notable drop in the likelihood of sunny weather compared to the peak of summer. With a 39% chance of sunshine, August stands out as a transitional month, where bright days give way to the crispness of early autumn. This decrease follows a more hopeful 62% in July, reflecting a seasonal trend where the long daylight and higher temperatures begin to wane. Despite this decline, August still offers pleasant opportunities for outdoor activities under the sun, making it a lovely time to embrace the lingering warmth before the cooler months arrive.
As summer begins to wane in Mariehamn, Åland Islands, August experiences a transition in daylight that reflects the shift toward autumn. With an average of 15 hours of daylight, August still basks in the warm aftermath of longer days, although it marks a noticeable decline from the peak 18 hours in June. This gradual decrease in daylight continues the trend of shorter days that will further unfold in September, dropping to 12 hours. Despite the diminishing sunlight, August remains a vibrant month, encapsulating the lingering brightness of summer while hinting at the cozy embrace of the fall season ahead.
In August, Mariehamn, nestled within the picturesque Åland Islands, experiences a return to moderate breezes, with an average wind speed of 6.8 m/s (15 mph). This month marks a slight increase from the calm of June and July, reflecting a transition as summer starts to wane. Notably, the winds begin to pick up again in October, reaching 9.1 m/s (20 mph), suggesting a gradual shift towards the more blustery months ahead. Overall, August serves as a bridge between the gentle summer winds and the invigorating gales of fall, inviting locals and visitors alike to enjoy the serene maritime atmosphere before winter's chill sets in.
Weather in Mariehamn varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Mariehamn, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January in Mariehamn showcase a striking contrast in weather. August typically enjoys milder temperatures, with averages around 17°C (63°F), peaking at 23°C (74°F), accompanied by a moderate level of precipitation at 53 mm over about 10 days. The humidity sits at a relatively comfortable 77%. In contrast, January brings frigid conditions, as temperatures plummet with averages of just 1°C (35°F) and highs of 8°C (46°F), while lows dive to a chilling -8°C (17°F). Despite slightly less precipitation at 48 mm, January experiences it over 11 days, with a higher humidity level of 90%, contributing to an overall colder feel. For a closer look at the specifics of January weather, you can visit Mariehamn weather in January.
August and February in Mariehamn present stark contrasts in weather. August boasts a mild average temperature of 17°C (63°F), with highs reaching up to 23°C (74°F) and a relatively comfortable humidity level of 77%. In contrast, February is characterized by frigid temperatures, with averages around 0°C (33°F) and maximums only climbing to 7°C (44°F). While both months experience precipitation on about 10 days, August receives more at 53 mm (2.1 in), compared to February's 38 mm (1.5 in), despite February's higher humidity at 88%. For additional insights on February's climate conditions, you can visit Mariehamn weather in February.
The weather in August and March presents a stark contrast, highlighting the seasonal shift in Mariehamn. In August, temperatures enjoy a milder range with minimums of 13°C (55°F) and maximums reaching 23°C (74°F), along with a moderate level of humidity at 77%. In comparison, March experiences much colder conditions, with temperatures plummeting to a minimum of -10°C (14°F) and only peaking at 9°C (48°F). While August sees more precipitation with 53 mm (2.1 in) over about 10 days, March has slightly less at 37 mm (1.5 in), albeit with a higher humidity of 89%. For a more detailed perspective on March weather, you can explore Mariehamn weather in March.
When comparing the weather of August and April, it's clear that August is significantly warmer and more humid. In August, temperatures range from a minimum of 13°C (55°F) to a maximum of 23°C (74°F), creating an average of 17°C (63°F), while April experiences much cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 9°C (48°F), resulting in an average of just 3°C (38°F). Additionally, August sees more precipitation with 53 mm (2.1 in) over about 10 days, compared to April's 24 mm (1.0 in) over 7 days. Interestingly, the humidity is slightly lower in August at 77%, compared to April’s higher 85%. For more detailed insights into the weather in April, check out Mariehamn weather in April.
In comparing the weather between May and August, it's evident that August is significantly warmer, with average temperatures reaching up to 17°C (63°F) compared to May's average of only 7°C (45°F). While both months experience similar humidity levels at 77%, August tends to see more rainfall, accumulating about 53 mm (2.1 in) over 10 days, whereas May has less precipitation, totaling 36 mm (1.4 in) over just 6 days. For more detailed insights into May's weather patterns, you can check out Mariehamn weather in May.
In comparing the weather of August and June, we see notable differences in temperature and precipitation. August tends to be warmer, with average temperatures ranging from a minimum of 13°C (55°F) to a maximum of 23°C (74°F), while June has a cooler range, with temperatures averaging between 7°C (44°F) and 21°C (70°F). Additionally, August experiences more precipitation, averaging 53 mm (2.1 in) over 10 days, compared to June's 29 mm (1.1 in) spread over just 4 days. Humidity levels are quite similar, with August at 77% and June slightly lower at 76%. For more details on June weather, visit Mariehamn weather in June.
In comparing the weather of August and July, we can see some notable differences. August experiences slightly warmer nights with a minimum temperature of 13°C (55°F) compared to July's 11°C (53°F). The average temperature remains the same at 17°C (63°F) for both months, but July boasts a marginally higher maximum temperature of 24°C (75°F) versus August's 23°C (74°F). Precipitation is also higher in August, with 53 mm (2.1 in) over 10 days, compared to July’s 45 mm (1.8 in) over just 7 days, reflecting a more humid environment in August at 77% versus July’s 74%. For more details on July's weather, visit Mariehamn weather in July.
In comparing the weather between August and September, August tends to be slightly warmer, with average temperatures ranging from a minimum of 13°C (55°F) to a maximum of 23°C (74°F). In contrast, September sees cooler temperatures, with averages of 8°C (46°F) to a maximum of 20°C (68°F). While August experiences less precipitation at 53 mm (2.1 in) over approximately 10 days, September's rainfall increases slightly to 56 mm (2.2 in) spread across 11 days. Additionally, September features higher humidity at 85%, compared to August's 77%. For more detailed information, you can check Mariehamn weather in September.
August typically showcases milder weather with average temperatures ranging from a minimum of 13°C (55°F) to a maximum of 23°C (74°F), accompanied by relatively low precipitation of 53 mm (2.1 in) over about 10 days. In contrast, October brings significantly cooler temperatures, with averages dropping to between 3°C (37°F) and 15°C (59°F), while experiencing more rainfall, totaling 90 mm (3.6 in) across 17 days. The humidity also rises in October to 89%, compared to August's 77%, highlighting the shift toward a more damp and brisk environment. For more detailed information, you can check Mariehamn weather in October.
August and November in Mariehamn present a striking contrast in weather. In August, temperatures are relatively mild, with an average of 17°C (63°F), while November sees a significant drop, with average temperatures falling to just 6°C (43°F). The summer month boasts a lower humidity of 77%, compared to November's damp conditions with humidity levels rising to 90%. Although August has slightly less precipitation at 53 mm (2.1 in) over about 10 days, November experiences a bit more with 57 mm (2.2 in) spread across 14 days, indicating the onset of winter. For an in-depth look at what to expect, visit Mariehamn weather in November.
August and December present striking contrasts in weather. In August, temperatures range from a mild 13°C (55°F) at night to a pleasant 23°C (74°F) during the day, accompanied by an average humidity of 77% and moderate rainfall of 53 mm (2.1 in) over about 10 days. In sharp contrast, December plunges into winter, with average temperatures dropping to a chilly 3°C (37°F) and maximums reaching only 7°C (46°F). The cold is compounded by higher humidity at 87% and increased precipitation of 80 mm (3.1 in) over 18 days. For those curious about the winter climate, more details can be found in Mariehamn weather in December.
As August arrives in Mariehamn, the weather begins to transition from the warm summer days, offering a delightful mix of mild temperatures and increased humidity. With an average temperature around 17°C, the month feels pleasantly warm, yet not as intense as July’s peak heat. Expect a few rainy days, accumulating around 53 mm of precipitation, which brings a refreshing contrast to the summer warmth. This blend of weather elements creates a unique atmosphere, making August a charming time to explore the picturesque landscapes of Mariehamn. For a deeper dive into the weather patterns throughout the year, be sure to check out Mariehamn Climate.