August Weather in Porvoo, Finland

Last updated: August 21, 2025

August in Porvoo, Finland presents a delightful mix of summer warmth and refreshing breezes. With maximum temperatures soaring up to 31°C (87°F) and an average of 16°C (62°F), the month promises plenty of pleasant days. However, be prepared for some rain, as 12 days may see precipitation totaling 78 mm (3.1 in). The high humidity level of 85% adds a touch of tropical flair to the summer atmosphere, making it an ideal time for both outdoor adventures and cozy indoor retreats. Whether you're exploring the charming old town or enjoying the natural beauty surrounding this picturesque locale, August offers a unique blend of experiences in Porvoo.

August Temperature in Porvoo

In August, Porvoo, Finland, experiences a delightful transition into late summer, with temperatures ranging from a comfortable 6°C (43°F) in the early morning to a warm 31°C (87°F) during the day. The average temperature settles at 16°C (62°F), providing pleasant conditions for outdoor activities and exploring the picturesque scenery of this charming town. This month stands out as one of the warmest in the year, reflecting a notable rise from the cooler months preceding it. With August being a time of vibrant colors and long, sunny days, it's an ideal season for both locals and visitors to soak up the beauty and warmth of Porvoo before the crispness of autumn sets in.

August Weather in Porvoo: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Porvoo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porvoo, August typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec272530405162646253443729
Data source: Temperature data for Porvoo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Porvoo

In August, Porvoo experiences a notable increase in precipitation, with an average of 78 mm (3.1 in), marking it as one of the wetter months of the year. The combination of 12 rainy days not only contributes to this elevated total but also signals a transition as the summer draws to a close. This uptick is part of a pattern that sees the summer months collectively becoming increasingly moist, culminating in August’s peak before the approaching autumn. Following July's 71 mm (2.8 in), August’s rainfall sets the stage for the wetter fall, with October typically bringing even more precipitation, aligning with the overall trend of increased rainfall as the seasons change. This shift underscores Porvoo's dynamic climate, where the lush landscapes flourish under the consistency of late summer rains.

August Precipitation Trends in Porvoo

The chart displays monthly precipitation patterns in Porvoo, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Porvoo, August typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec544849485056717863805673
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Porvoo

In August, Porvoo experiences a notable rise in humidity, reaching 85% as summer draws to a close. This increase comes after a relatively drier June and July, where humidity levels bath in the comfortable 74% and 80% range, respectively. Throughout the year, humidity levels consistently hover high, starting with a near-saturation of 98% in January and gradually tapering down to a more moderate 75% in May. As autumn approaches, the trend shifts back upward, with September bringing a significant jump to 90%, reflecting the changing season. Overall, Porvoo's humidity patterns denote a humid climate, with noticeable fluctuations that evoke the transitions between the vibrant warmth of summer and the cooler embrace of autumn.

August Average Humidity in Porvoo

This chart illustrates the average monthly humidity levels in Porvoo, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Porvoo is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%93%87%75%74%80%85%90%94%94%96%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Porvoo

In August, Porvoo, Finland, experiences a moderate UV Index of 5, indicating that while sun exposure is generally safe, caution is still advisable. This month shows a slight decline from the high levels of 7 seen in June and July, when the sun's intensity is at its peak. With a burn time of 30 minutes, it's important to enjoy the summer sunshine while being mindful of skin protection. As autumn approaches, the UV Index begins to taper, heading towards lower levels in the coming months. For detailed insights into UV exposure throughout the year, check out the complete Porvoo UV Index.

Maximum UV Index Levels in Porvoo for August

The chart shows the monthly maximum UV Index (UVI) for Porvoo in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Porvoo typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Porvoo August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

August Sunshine in Porvoo

In August, Porvoo, Finland, basks in a generous 408 hours of sunshine, making it one of the sunniest months of the year. Following the peak of summer in June with an impressive 491 hours, the days gradually begin to shorten as autumn approaches, yet August still offers a vibrant display of sunlight, significantly higher than the subsequent months of September and October with 289 and 193 hours respectively. This pattern highlights how the long, bright days of summer transition into the softer light of autumn, allowing residents and visitors alike to revel in the warm hues of late summer before the chill sets in. Overall, August serves as a beautiful bridge between the radiant summer and the brisk fall, inviting exploration of Porvoo's picturesque landscapes bathed in golden light.

Monthly Sunshine Duration in Porvoo: August Highlighted

The August sunshine duration represents the total number of hours Porvoo experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec52h151h262h361h451h491h485h408h289h193h108h53h
Data source: Porvoo August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Porvoo During August

In Porvoo, Finland, the likelihood of enjoying sunny weather experiences a notable peak during the summer months, with July leading the way at 57% sunshine. Following this, August presents a significant drop to 27%, highlighting a transitional shift as summer wanes. This decrease in sunny days contrasts sharply with the earlier months of June and July, suggesting that while you may still catch some rays, it's wise to prepare for a balance of weather in August. As autumn approaches, the chances of sunny weather drop further, with September and October hovering around 26% and 18%, respectively. Therefore, while August may still offer opportunities for outdoor enjoyment, it signals the beginning of a gradual retreat from the long, bright days of summer.

Percentage of Sunny Days in August in Porvoo

The chart illustrates the percentage of sunny days in Porvoo throughout the year, with August highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Porvoo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec5%15%37%44%29%53%57%27%26%18%16%12%
Data source: Porvoo August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Porvoo in August

In Porvoo, Finland, August marks a transition in daylight as summer begins to wane, offering about 15 hours of sunlight. This follows the peak daylight of 18 hours experienced in June and July, highlighting the gradual decline as the days shorten. As the month progresses, the vibrant energy of summer starts to ebb, making way for the crispness of early autumn. This shift not only influences the landscape's colors but also invites a change in activities, as residents and visitors alike savor the lingering warmth of late summer days. The light will continue to diminish in the coming months, leading towards the shorter daylight hours of fall, making August a beautiful bridge between the long summer days and the approaching winter gloom.

Average Daylight Hours in Porvoo for August

The chart illustrates the variation in daylight duration in Porvoo throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec6h 42m9h 5m11h 51m14h 40m17h 17m18h 50m18h15h 33m12h 48m10h 1m7h 24m5h 52m
Data source: Porvoo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Porvoo

As August unfolds in Porvoo, Finland, the average wind speed rises to 3.8 m/s (9 mph), marking a refreshing shift as summer begins to wane. This modest increase highlights a trend seen throughout the season, where the winds remain relatively gentle, peaking in March and October, both at 4.0 m/s (9 mph) and 4.5 m/s (10 mph) respectively. While July often experiences lower winds at 3.1 m/s (7 mph), August's breezy atmosphere invites both locals and visitors to enjoy the tail end of summer with a sense of invigorating crispness. As the year progresses, the winds tend to gain strength in the autumn months, hinting at the changing seasons ahead.

Average August Wind Speed in Porvoo

The chart displays monthly wind speed patterns in Porvoo, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.43.14.03.63.32.73.13.8 m/s3.54.53.83.7
Data source: Porvoo August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Porvoo Compares to Other Months

Weather in Porvoo varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Porvoo, focusing on differences in temperature, rainfall, humidity, and UV levels.

August and January present stark contrasts in weather. In August, temperatures vary significantly, ranging from a cool 6°C (43°F) at their lowest to a warm 31°C (87°F) at their peak, with an average of 16°C (62°F). This month sees relatively high humidity at 85% and has 12 days of precipitation totaling 78 mm (3.1 in). In comparison, January experiences much harsher conditions, with temperatures plummeting to a minimum of -25°C (-13°F) and averaging around -3°C (27°F), peaking at just 8°C (47°F). The precipitation in January is lower at 54 mm (2.1 in) but spans 11 days, accompanied by high humidity at 98%. For those curious about the specifics of January weather, you can explore more at Porvoo weather in January.

August and February present a striking contrast in weather conditions. In August, temperatures range from a mild 6°C (43°F) at night to a warm 31°C (87°F) during the day, with an average of 16°C (62°F). The month sees moderate precipitation of 78 mm (3.1 in) over 12 days and maintains a relatively high humidity level of 85%. In contrast, February is characterized by frigid temperatures, with a minimum of -25°C (-13°F) and a maximum of only 8°C (46°F), resulting in an average temperature of -4°C (25°F). Precipitation is lower at 48 mm (1.9 in) over 10 days, but humidity is even higher at 96%. For those looking to learn more about February's weather, you can visit Porvoo weather in February.

In August, temperatures in Porvoo are considerably warmer, ranging from a minimum of 6°C (43°F) to a maximum of 31°C (87°F) with an average of 16°C (62°F). The month sees around 78 mm (3.1 in) of precipitation over approximately 12 days, accompanied by a humidity level of 85%. In contrast, March experiences much colder temperatures, with a minimum of -23°C (-10°F) and a maximum of 13°C (55°F), averaging -1°C (30°F). Precipitation during March is lower at 49 mm (1.9 in), but the humidity is slightly higher at 93% over the same 12 days. For more detailed insights on March weather, check out Porvoo weather in March.

When comparing the weather in August and April, it's evident that August is significantly warmer and more humid. August experiences a minimum temperature of 6°C (43°F) and can rise to a maximum of 31°C (87°F), with an average of 16°C (62°F). In contrast, April starts much cooler, with temperatures dipping as low as -14°C (7°F) and averaging just 4°C (40°F) before reaching a maximum of 21°C (70°F). In terms of precipitation, August sees more rain with 78 mm (3.1 in) over 12 days, while April receives 48 mm (1.9 in) over 11 days. Although both months have high humidity levels, April's 87% slightly edges out August's 85%. For more specific insights on April weather, you can check Porvoo weather in April.

When comparing the weather in August and May, a noticeable contrast emerges in both temperature and humidity. August boasts a warmer average temperature of 16°C (62°F), with maximums reaching up to 31°C (87°F), while May’s average is cooler at 11°C (51°F) and maxing out at 29°C (84°F). Additionally, August experiences higher humidity levels at 85%, compared to May’s 75%. Precipitation is slightly more pronounced in August, with 78 mm (3.1 in) over 12 days, versus May's 50 mm (2.0 in) across 10 days. For a closer look at May's conditions, you can check out Porvoo weather in May.

In comparing the weather of August and June, both months exhibit mild temperatures but differ in several key aspects. August typically has a warmer range with minimum temperatures around 6°C (43°F) and a maximum of 31°C (87°F), while June has slightly cooler temperatures, ranging from a minimum of 2°C (35°F) to a maximum of 32°C (89°F). Interestingly, the average temperature for both months is similar at around 16°C (62°F) for August and 17°C (62°F) for June. Precipitation is more frequent in August with 78 mm (3.1 in) over 12 days, compared to June's 56 mm (2.2 in) across 11 days. Additionally, humidity levels are higher in August, reaching 85% compared to June's 74%. For more details on June's weather, you can refer to Porvoo weather in June.

In comparing the weather of August and July, we can observe some notable differences. August tends to have slightly cooler temperatures overall, with a minimum of 6°C (43°F) compared to July's 7°C (44°F). The average temperature in August is also lower at 16°C (62°F), versus 18°C (65°F) in July. However, the maximum temperatures are quite similar, with August peaking at 31°C (87°F) and July reaching 32°C (89°F).

Precipitation levels show that August experiences more rainfall, totaling 78 mm (3.1 in) over 12 days, while July has 71 mm (2.8 in) over the same number of days. Humidity is higher in August at 85%, compared to 80% in July, making August feel a bit muggier. For a closer look at July's specific weather patterns, you can visit Porvoo weather in July.

August typically features much warmer temperatures, with a minimum of 6°C (43°F) and a maximum of 31°C (87°F), offering an average of 16°C (62°F). In contrast, September cools off significantly, with minimums dropping to -2°C (29°F) and maximums reaching only 24°C (75°F), leading to a cooler average of 12°C (53°F). While August experiences a slightly higher precipitation of 78 mm (3.1 in) over 12 days, September sees less rainfall at 63 mm (2.5 in), although it retains a similar number of wet days. Additionally, humidity levels rise slightly in September to 90%, compared to 85% in August. For more specific details on September weather, check out Porvoo weather in September.

August and October present notably different weather patterns. In August, temperatures typically range from a mild 6°C (43°F) at night to a warm 31°C (87°F) during the day, with an average of 16°C (62°F). The month sees about 78 mm (3.1 in) of precipitation over 12 days, accompanied by relatively high humidity at 85%. In contrast, October experiences much cooler temperatures, with minimums dropping to -5°C (23°F) and an average of only 7°C (44°F), while the maximum temperature reaches 17°C (64°F). Although the precipitation slightly increases to 80 mm (3.2 in) over 15 days, the humidity also rises to 94%, creating a noticeably damp atmosphere. For a more detailed look at October weather, you can visit Porvoo weather in October.

August and November present contrasting weather in terms of temperature and humidity. In August, temperatures range from a minimum of 6°C (43°F) to a maximum of 31°C (87°F) with an average of 16°C (62°F), accompanied by relatively high humidity levels of 85%. This month experiences more precipitation, totaling 78 mm (3.1 inches) over 12 days. In stark contrast, November has much colder temperatures, with a minimum of -8°C (18°F) and a maximum of only 12°C (54°F), averaging 3°C (37°F). Although it has slightly less precipitation at 56 mm (2.2 inches) across the same number of days, humidity is notably high at 94%, giving the month a more frigid feel. For more detailed insights into November's weather, you can visit Porvoo weather in November.

In August, the weather features a wide range of temperatures, with minimums around 6°C (43°F) and highs reaching up to 31°C (87°F), creating a warm and vibrant atmosphere. The average temperature hovers at a comfortable 16°C (62°F), accompanied by relatively high humidity levels at 85%, and precipitation falls on about 12 days, totaling 78 mm (3.1 in). In stark contrast, December ushers in a colder climate, with temperatures plummeting to a minimum of -20°C (-3°F) and averaging around -1°C (30°F). The maximum temperature reaches just 7°C (44°F), reflecting a chilly and harsh winter. Despite slightly less precipitation, at 73 mm (2.9 in) across 16 days, the humidity rises to a notable 96%, adding to the cold and damp feel typical of winter. For more details on the winter weather conditions, you can check Porvoo weather in December.

Compare Porvoo's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Porvoo

August in Porvoo ushers in a delightful blend of summer warmth and the onset of autumn's chill. As the month progresses, temperatures average a pleasant 16°C (62°F), with peaks reaching 31°C (87°F), offering residents and visitors extended opportunities for outdoor enjoyment. However, the humidity lingers around 85%, contributing to the feeling of warmth and occasional discomfort. Rainfall also makes its presence known, contributing 78 mm (3.1 in) over 12 days, hinting at the transitional nature of the season. This contrasts sharply with the drier and cooler months that bookend August, making it a unique time to embrace the changing scenery. For those wishing to explore more about Porvoo's climate, delve into Porvoo Climate.