Last updated: August 21, 2025
August in Helsinki, Finland is marked by a delightful blend of temperatures and weather patterns that showcase the essence of summer. The maximum temperature can soar to a warm 29°C (84°F), providing ample opportunities for outdoor activities. However, the average temperature sits comfortably at 17°C (62°F), making it an ideal time for sightseeing and enjoying the city's natural beauty. With a minimum of 7°C (45°F), cooler evenings are a reminder that autumn is on the horizon. Despite 83 mm (3.3 in) of precipitation spread over 13 days, the humidity level, reaching 83%, infuses the air with the refreshing scent of the sea. Overall, August presents a vibrant yet temperate atmosphere, perfect for both locals and visitors alike.
In August, Helsinki experiences a gentle transition towards autumn, boasting a minimum temperature of 7°C (45°F) and an average of 17°C (62°F). With maximums reaching up to 29°C (84°F), the month is a delightful extension of summer, inviting both locals and tourists to enjoy the city's vibrant outdoor life. This rise in temperatures from the cooler spring months signifies a trend of warming that peaks in midsummer. As August progresses, nights begin to cool, hinting at the approach of fall, yet the lingering warmth allows for ample opportunities to relish the beautiful Finnish landscapes before the colder months return.
August in Helsinki sees a substantial precipitation total of 83 mm (3.3 in), reflecting the city's wet summer season. This month typically experiences 13 days of rain, matching July's frequency, which contributes to the lush greenery that characterizes the late summer landscape. The rainfall is a slight dip from July's peak of 91 mm, yet it remains significant compared to earlier months like May and June. As summer transitions to autumn, the precipitation trend hints at a shift, setting the stage for the wetter months ahead, with September and October also showcasing robust rainfall amounts. Overall, August offers a balance of warmth and moisture, making it a vibrant time in Helsinki.
In Helsinki, the month of August experiences a moderate increase in humidity, reaching 83%. This marks a transition from the drier summer months of May and June, both at 75%, to the more humid atmosphere that characterizes the autumn season. As summer wanes, humidity levels begin to rise again, following the pattern seen from July's 80% humidity. This uptick foreshadows the upcoming months, which bring an increase in moisture, culminating in September's 90%. Overall, August serves as a bridge between the warm and more humid fall months, creating a unique climate experience for residents and visitors alike.
In August, Helsinki experiences a moderate UV Index of 5, indicating a notable increase in sun exposure as summer peaks, with a burn time of around 30 minutes for fair-skinned individuals. This drop from the high levels of 7 seen in both June and July signals a transition toward the milder autumn months. As daylight hours begin to wane, it's essential to stay mindful of sun protection, particularly during peak hours. Understanding these trends is crucial for enjoying the city's beautiful late-summer sunshine safely. For more detailed insights, visit Helsinki UV Index.
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August in Helsinki enjoys a delightful transition from the vibrant summer months, boasting 406 hours of sunshine. This abundant sunlight is a continuation of June's peak, which sees the city basking in 493 hours, and July, slightly trailing with 485 hours. As summer transitions into fall, sunshine begins to wane, with September showing a notable drop to 290 hours. This seasonal variation underscores the joy of August as one of the last sunny months before Helsinki prepares for the shorter, darker days ahead. The trend clearly highlights the importance of August as a golden period for enjoying the outdoors, making it a favorite time for both locals and visitors alike to soak up the final rays of summer.
In Helsinki, August offers a moderate 29% chance of sunny weather, a noticeable dip compared to the peak summer months of July and June, which boast 56% and 53% chances, respectively. This trend reflects the gradual shift toward autumn, with sunshine becoming less certain as the days grow shorter. However, the likelihood remains significantly higher than winter months, such as January and February, where the chance of sun plummets to a mere 5% and 15%. While August might not promise the same abundant sunlight as earlier in the summer, it still offers plenty of opportunities for outdoor activities amid the lingering warmth of summer.
In Helsinki, Finland, August marks the gradual transition from the long, sun-soaked days of summer to the shorter daylight hours of autumn. With 15 hours of daylight, this month offers a delightful balance, allowing residents and visitors to fully enjoy the lingering warmth and vibrant outdoor activities. Following the peak daylight of 18 hours experienced in June, August still captures the essence of summer while hinting at the approaching seasonal shift. As daylight hours begin to decrease in September, August serves as a gentle reminder of the light and life that characterize the Finnish summer months, creating a perfect backdrop for exploration and connection before the days grow shorter.
In August, Helsinki experiences a noticeable uptick in wind speed, averaging 4.4 m/s (10 mph), providing a refreshing breeze that signals the transition toward autumn. This increase positions August both as a breath of fresh air and a precursor to the brisk winds that mark the fall months. As the summer winds down, Helsinki's winds remain relatively calm, with June and July averaging lower at 3.0 m/s (7 mph) and 3.5 m/s (8 mph), respectively. However, the late summer months start to anticipate the autumn's more robust gusts, as evidenced by the wind speeds in September dropping slightly to 4.1 m/s (9 mph), before climbing again in October. This fluctuation creates a dynamic wind pattern that shapes the city's vibrant outdoor activities and scenic coastal experiences throughout the summer and fall.
Weather in Helsinki varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Helsinki, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present contrasting weather conditions. In August, temperatures range from a minimum of 7°C (45°F) to a maximum of 29°C (84°F), with an average of 17°C (62°F). The month experiences significant humidity at 83% and receives about 83 mm (3.3 in) of precipitation over 13 days. In stark contrast, January features frigid temperatures, with a minimum of -23°C (-9°F), an average of -3°C (28°F), and a maximum of 8°C (46°F). The month has a lower precipitation level of 55 mm (2.2 in) over 11 days and a very high humidity of 97%. This clear disparity highlights January's ice-cold atmosphere compared to August's warm and humid conditions. For a detailed look at January in Helsinki, visit Helsinki weather in January.
August and February present strikingly contrasting weather conditions. In August, temperatures range from a relatively mild 7°C (45°F) to a warm 29°C (84°F), with an average of 17°C (62°F). The month experiences some rain, totaling 83 mm (3.3 in) over approximately 13 days, and a humidity level of 83%, contributing to a warm, summery feel. In stark contrast, February brings frigid temperatures, with lows plunging to -23°C (-8°F) and an average of -3°C (26°F). Precipitation is lower at 48 mm (1.9 in) over 10 days, but the humidity is higher at 95%, creating a cold, damp atmosphere. For more details on February weather, you can visit Helsinki weather in February.
August and March present stark contrasts in weather patterns. In August, temperatures range from a cool 7°C (45°F) at night to a warm 29°C (84°F) during the day, with an average of 17°C (62°F). The month experiences about 83 mm (3.3 in) of precipitation over 13 days, coupled with a humidity level of 83%, creating a warm and occasionally damp atmosphere.
In contrast, March is characterized by much colder temperatures, with lows plummeting to -22°C (-7°F) and highs only reaching 10°C (51°F), resulting in an average temperature of -1°C (31°F). The month sees approximately 52 mm (2.0 in) of precipitation across 12 days and a higher humidity of 93%, contributing to a chilly, damp environment. For more detailed information, you can visit Helsinki weather in March.
When comparing the weather in August and April, it's clear that August is significantly warmer and more humid. August boasts an average temperature of 17°C (62°F), reaching highs of 29°C (84°F), while April has a much cooler average of 4°C (39°F), with maximum temperatures only reaching 19°C (67°F). Precipitation is more common in August, occurring on about 13 days and totaling 83 mm (3.3 in), compared to April's 48 mm (1.9 in) over 9 days. The humidity in both months is quite high, with August at 83% and April slightly higher at 86%. For more detailed information, you can check out Helsinki weather in April.
August typically presents a warmer climate compared to May, with average temperatures ranging from a minimum of 7°C (45°F) to a maximum of 29°C (84°F), while May sees a broader range with minimums of -3°C (27°F) and maximums of 27°C (80°F). August experiences higher humidity at 83%, making it feel more tropical, whereas May's humidity sits at a cooler 75%. Precipitation is more frequent in August, with rain over 13 days amounting to 83 mm (3.3 in), in contrast to May’s 56 mm (2.2 in) over 10 days. For more detailed insights on May weather, you can visit Helsinki weather in May.
In comparing the weather between June and August, we see some notable differences. August experiences a wider temperature range, with minimums of 7°C (45°F) and maximums reaching 29°C (84°F), while June's temperatures are slightly milder, ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F). Both months have similar average temperatures, around 16-17°C (62°F), but August is typically wetter, with 83 mm (3.3 in) of precipitation compared to June's 61 mm (2.4 in) over a few more days of rain. Additionally, humidity is higher in August at 83% compared to June's 75%. For more detailed insights, you can check out Helsinki weather in June.
In comparing the weather of August and July, August tends to be slightly cooler, with average temperatures ranging from a minimum of 7°C (45°F) to a maximum of 29°C (84°F), compared to July's range of 8°C (46°F) to 32°C (90°F). Precipitation is relatively similar in both months, with August experiencing 83 mm (3.3 in) compared to July's 91 mm (3.6 in), each having about 13 rainy days. Interestingly, August also has a higher humidity level at 83% compared to July's 80%. For more detailed information on July's weather, check out Helsinki weather in July.
August typically boasts warmer temperatures, with an average of 17°C (62°F) and a maximum of 29°C (84°F), making it a pleasant summer month. In contrast, September sees a notable drop in temperatures, averaging around 12°C (54°F) with highs reaching only 23°C (73°F). While both months experience similar amounts of precipitation—around 76-83 mm (3.0-3.3 in) over 13 days—September tends to have higher humidity at 90%, compared to August's 83%. For more detailed weather information, you can check Helsinki weather in September.
August and October present quite a contrast in weather patterns. In August, temperatures range from a mild 7°C (45°F) at night to a warm 29°C (84°F) during the day, with average temperatures hovering around 17°C (62°F). Humidity is relatively high at 83%, and while there are 13 days of rain, the total precipitation is 83 mm (3.3 in).
In contrast, October marks a significant drop in temperature, with nightly lows plunging to -4°C (25°F) and daytime highs only reaching 16°C (62°F), resulting in an average temperature of just 7°C (45°F). The month is also wetter, with 89 mm (3.5 in) of precipitation spread over 17 rainy days and an increase in humidity to 93%. For more detailed information, you can visit Helsinki weather in October.
August and November present a stark contrast in weather patterns. August boasts milder temperatures, ranging from a minimum of 7°C (45°F) to a maximum of 29°C (84°F), with an average of 17°C (62°F). The month sees considerable precipitation, totaling 83 mm (3.3 in) over 13 days, alongside high humidity levels of 83%. In contrast, November experiences much cooler temperatures, with a minimum of -7°C (19°F) and a maximum of 12°C (54°F), averaging just 3°C (38°F). Although precipitation is slightly lower at 62 mm (2.5 in) over the same number of days, humidity rises to 94%, creating a damp and chilly atmosphere. For more details, you can check Helsinki weather in November.
August weather in Helsinki is characterized by mild temperatures, with a minimum of 7°C (45°F) and an average of 17°C (62°F), peaking at a maximum of 29°C (84°F). Although the month experiences around 83 mm (3.3 in) of precipitation over approximately 13 days, the humidity remains relatively high at 83%, contributing to a warm summer feel.
In contrast, December brings a stark shift in conditions, with temperatures dropping significantly. The minimum temperature plummets to -18°C (0°F), averaging around -1°C (31°F) and reaching a maximum of only 7°C (44°F). Precipitation in December is slightly lower at 73 mm (2.9 in) but occurs over 15 days, coupled with an even higher humidity of 95%, creating a crisp, cold atmosphere. For a deeper insight into the winter climate, you can explore Helsinki weather in December.
As summer draws to a close, August in Helsinki offers a unique blend of warmth and the gradual onset of autumn's chill. With temperatures reaching a pleasant average of 17°C (62°F) and occasional peaks around 29°C (84°F), this month stands out as one of the warmest before the cooler months descend. However, higher humidity levels (83%) and increased precipitation make for a more dynamic weather experience, with rain gracing about half the days of the month. This combination creates an inviting yet unpredictable ambiance, showcasing a beautiful transition in nature. To learn more about the overall climate patterns in this vibrant city, visit Helsinki Climate.