Last updated: August 21, 2025
Experience the enchanting August weather of Naantali, Finland, where summer reaches a peak with maximum temperatures soaring up to 28°C (83°F). The average temperature hovers around a comfortable 17°C (62°F), making it ideal for outdoor adventures. However, be prepared for the occasional rain, as August sees about 87 mm (3.4 in) of precipitation over 14 days, contributing to a humidity level of 79%. The combination of warm days and refreshing breezes provides a perfect backdrop for exploring this picturesque coastal town.
In August, Naantali, Finland basks in mild temperatures that signal the peak of summer. With a minimum of 6°C (43°F) and a comfortable average of 17°C (62°F), the days are pleasantly warm, while the highs can reach up to 28°C (83°F), perfect for enjoying the outdoors. This month notably transitions from the sweltering warmth of July, yet still retains a summery vibe, making it ideal for exploring the picturesque archipelago and coastal beauty. As summer begins to wane, the gradual cooling reflects the shift towards autumn, with September hinting at cooler days ahead.
In August, Naantali experiences a notable peak in precipitation, with 87 mm (3.4 in) of rain over 14 days, making it one of the wettest months of the year. This increase contrasts sharply with the relatively drier early summer months, where June recorded only 43 mm (1.7 in) over just 7 days. The shift to more consistent rainfall signifies the transition from summer's warmth to the cooler, wetter autumn. This trend of rising precipitation continues into September, which shows a decrease in both rainfall and rainy days, indicating that while August brings the summer's final bursts of rain, the following months prepare the region for the onset of autumnal weather.
In August, Naantali experiences a relative humidity of 79%, reflecting a slight uptick from the 77% in May and remaining consistent with the preceding months of summer. This increase marks a seasonal trend, as humidity levels gradually rise from early spring’s 85% in April to the higher figures seen in late summer and early autumn. Interestingly, this summer month is a transition point, leading into a noticeable uptick in humidity in September, when levels soar to 86%. Overall, August acts as a bridge between the drier summer and the more humid fall, supporting the region's lush landscapes.
In August, Naantali experiences a moderate UV Index of 5, marking a slight decline from the hot summer months of June and July when the index peaked at 7. This indicates a transition as the days begin to shorten and the intensity of the sun's rays diminishes. While the burn time remains at 30 minutes, it’s crucial to stay aware of the UV exposure, especially when planning outdoor activities. As summer fades, the trend shows autumn approaching, with the UV Index set to drop further in September. For more information on the UV Index throughout the year, check out Naantali UV Index.
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In August, Naantali basks in a delightful 423 hours of sunshine, a vibrant continuation of the summer glow that peaked in July with 490 hours. This abundance of light signifies the tail end of a sun-kissed season, where residents and visitors alike can enjoy the warm embrace of summer while it lasts. As the year progresses into September, the sun's presence begins to wane, dropping to 315 hours, a clear indication of the approaching autumn. This gradual shift in daylight not only highlights the joys of the earlier months but also sets the stage for the cozy, golden hues of Finnish fall. Embracing the bright days of August is essential, as the contrast with the shorter days ahead reminds us to savor every luminous moment.
In Naantali, Finland, the likelihood of sunny weather in August reflects a unique seasonal trend, with a 33% chance of sunshine. This marks a notable shift from the high probabilities seen in the earlier summer months of June (56%) and July (57%), when the days are at their brightest. As August unfolds, the warmth of summer begins to wane, leading to a slight decline in sunny days compared to its predecessors. Nevertheless, August retains a decent opportunity for sun, echoing the similar transitional patterns observed in September (32%) and October (18%), while still offering a cheerful close to the summer season.
In August, Naantali basks in a delightful 15 hours of daylight, signaling the tail end of its sun-kissed summer days. As the season transitions, the daylight gradually recedes from the heights of 18 hours witnessed in June and July. This subtle decline foreshadows the shorter days of autumn, but August still offers plenty of sunshine for outdoor activities and late-night gatherings. The gradual shift from the longest days of summer to the dimmer months ahead reminds locals and visitors alike to savor every moment of sunlight before the days grow shorter. With daylight starting at a promising amount in August, Naantali continues to be a vibrant hub for enjoying nature and the outdoors.
In August, Naantali experiences a refreshing shift in wind patterns, with an average speed of 4.1 m/s (9 mph). This capstone to summer shows a gentle increase compared to July’s 3.5 m/s (8 mph), offering a balmy respite as the season transitions. Interestingly, August’s winds mirror those of September, suggesting a consistent late-summer breeze that breathes life into the coastal landscape. Looking back through the months, a subtle upward trend is evident as the wind typically strengthens in the fall, peaking in October at 5.3 m/s (12 mph). This pattern hints at a lively atmosphere that invites both locals and visitors to enjoy the picturesque surroundings of Naantali during this fleeting yet dynamic time of year.
Weather in Naantali varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Naantali, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, the weather is notably milder, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F) and an average of 17°C (62°F). This month experiences 87 mm (3.4 in) of precipitation over about 14 days, coupled with a humidity level of 79%. In contrast, January brings a stark chill, where temperatures plummet to a minimum of -21°C (-6°F) and reach a maximum of only 8°C (47°F), averaging at -2°C (29°F). Precipitation in January is lower at 48 mm (1.9 in) over approximately 9 days, but humidity levels rise to 92%. For those seeking more detailed information, you can check out Naantali weather in January.
August and February present a stark contrast in weather conditions. In August, temperatures range from a chilly 6°C (43°F) at night to a pleasant high of 28°C (83°F) during the day, with an average of 17°C (62°F). Despite the warm weather, August experiences significant rainfall, with about 87 mm (3.4 in) of precipitation over 14 days and an average humidity level of 79%.
On the other hand, February is characterized by much colder temperatures, with nighttime lows plummeting to -20°C (-4°F) and daytime highs reaching only 7°C (44°F), resulting in a cumulative average of -3°C (27°F). Precipitation is less frequent in February, totaling 42 mm (1.7 in) over 8 days, but the humidity is notably higher at 90%. For more details on the weather in February, you can visit Naantali weather in February.
August and March present starkly contrasting weather conditions. In August, temperatures typically range from a minimum of 6°C (43°F) to a warm maximum of 28°C (83°F), providing a pleasant average of 17°C (62°F). The month sees around 87 mm (3.4 in) of precipitation over approximately 14 days, accompanied by a humidity level of 79%. In contrast, March is characterized by much colder temperatures, with lows plunging to -23°C (-9°F) and an average of 0°C (32°F), peaking at just 11°C (52°F). Precipitation is lower at 44 mm (1.7 in), occurring on about 9 days, and the humidity is slightly higher at 89%. For a more detailed look, you can check Naantali weather in March.
When comparing the weather in August and April, significant differences emerge. August boasts a warm average temperature of 17°C (62°F), with maximum highs reaching 28°C (83°F), making it a much hotter month compared to April, where the average temperature is a cooler 4°C (39°F) and highs can only reach up to 21°C (70°F). Precipitation is notably higher in August, totaling 87 mm (3.4 in) over 14 days, while April sees only 32 mm (1.3 in) of rain across 9 days. Humidity levels are relatively similar, with August at 79% and April slightly higher at 85%. For more detailed information on April's weather, consider checking Naantali weather in April.
In comparing the weather between May and August, one can observe distinct differences in temperature, precipitation, and humidity. August typically sees higher temperatures, ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), with an average of 17°C (62°F). In contrast, May has cooler temperatures with a minimum of -4°C (26°F) and a maximum of 26°C (79°F), averaging only 10°C (49°F). Precipitation also varies, with August receiving 87 mm (3.4 in) over 14 days, while May has less, at 44 mm (1.7 in) over 9 days. Humidity levels are relatively similar, with August at 79% and May slightly lower at 77%. For more detailed insights, you can check Naantali weather in May.
In June, the weather in Naantali tends to be mild, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 28°C (83°F) and an average of 16°C (61°F). Rainfall is relatively light, averaging 43 mm (1.7 in) over about 7 days, accompanied by a humidity level of 78%. In contrast, August brings warmer temperatures with a minimum of 6°C (43°F), an average of 17°C (62°F), and the same maximum of 28°C (83°F). However, August experiences significantly more rainfall, accumulating 87 mm (3.4 in) spread across 14 days, along with a slightly higher humidity level of 79%. For more detailed information about June weather, you can visit Naantali weather in June.
Comparing the weather in August and July reveals some notable differences. August experiences a slightly broader temperature range, with minimums similar to July at 6°C (43°F) but average temperatures dropping to 17°C (62°F) and maximums reaching 28°C (83°F). In contrast, July maintains a warmer average of 18°C (64°F) and higher maximum temperatures up to 31°C (89°F). Precipitation also varies, with August receiving 87 mm (3.4 in) over 14 days compared to July's 75 mm (3.0 in) over 11 days, making August a wetter month. Humidity levels are similar, with August at 79% and July at 78%. For a closer look at the specifics, check out Naantali weather in July.
August and September display notable differences in weather patterns. August tends to be milder, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 28°C (83°F), while September sees cooler temperatures, dropping to a minimum of -1°C (31°F) and peaking at 23°C (73°F). Precipitation is slightly lower in September at 72 mm (2.8 in) compared to August's 87 mm (3.4 in), even though it rains on similar numbers of days. Additionally, September experiences higher humidity levels at 86%, compared to August's 79%. For more detailed information about the weather in Naantali during this month, check out Naantali weather in September.
August and October present a noticeable shift in weather patterns. In August, temperatures range from a mild 6°C (43°F) at night to a warm 28°C (83°F) during the day, with an average of 17°C (62°F). The month experiences around 87 mm (3.4 in) of precipitation over 14 days, coupled with a humidity level of 79%, creating a warm and somewhat humid atmosphere.
In contrast, October brings cooler temperatures, with a minimum of -5°C (23°F) and a maximum of 17°C (62°F), resulting in an average of just 7°C (46°F). Precipitation remains similar, at 86 mm (3.4 in) but occurs over more days—17 in total—with humidity increasing slightly to 90%. This shift highlights the transition from the warmth of late summer to the chill of early autumn. For more detailed insights, you can check Naantali weather in October.
In August, the weather is generally warm, with average temperatures around 17°C (62°F) and maximum highs reaching up to 28°C (83°F), making it a pleasant summer month. However, with an average humidity of 79% and 14 days of precipitation totaling 87 mm (3.4 in), the month can feel muggy at times. In contrast, November brings a significant drop in temperature, where the average sits at just 4°C (39°F) and nighttime lows can plummet to -8°C (17°F). This colder month experiences less precipitation overall, with about 59 mm (2.3 in) over 12 days, but it carries a higher humidity level of 91%, making the air feel even chillier. For more detailed insights, visit Naantali weather in November.
In August, temperatures in Naantali range from a pleasant minimum of 6°C (43°F) to a warm maximum of 28°C (83°F), with an average temperature of 17°C (62°F). The weather is characterized by higher humidity at 79%, and there's about 87 mm (3.4 in) of precipitation spread over 14 days. In stark contrast, December brings a sharp drop in temperatures, with a minimum of -18°C (-1°F) and a maximum of only 7°C (45°F), resulting in an average of 0°C (32°F). The month sees even higher humidity at 89%, with 79 mm (3.1 in) of precipitation occurring over 15 days. For a more detailed look at December weather in Naantali, visit Naantali weather in December.
As August rolls in, Naantali experiences a delightful transition, marked by warmer days and a distinct increase in humidity, setting it apart from the cooler summer months. While temperatures peak at a comfortable 28°C, the average invites soothing warmth, making outdoor activities especially enjoyable. However, August is also characterized by its share of rainfall, with over half the month experiencing precipitation. This blend of warmth and occasional showers creates a unique climate that beautifully balances summer's end with the onset of fall. For a deeper dive into the weather patterns throughout the year, check out Naantali Climate.