August Weather in Sapporo, Japan

Last updated: August 21, 2025

In August, Sapporo, Japan, experiences a dynamic weather pattern characterized by warm temperatures and high humidity. The maximum temperature can reach a scorching 31°C (88°F), while the average hovers around a comfortable 21°C (69°F), providing a pleasant yet sometimes steamy summer atmosphere. However, visitors should be prepared for occasional cooler spells, with temperatures dipping to a minimum of 10°C (51°F). During this month, Sapporo sees considerable precipitation, totaling 183 mm (7.2 in), spread over about 14 days of rain, resulting in a humid environment with an average humidity of a striking 95%. This combination of heat and moisture contributes to the lush greenery and vibrant summer scenery that Sapporo is renowned for.

August Temperature in Sapporo

In August, Sapporo basks in the warmth of summer, with temperatures notably rising compared to the rest of the year. This month typically sees minimums of 10°C (51°F) and averages around 21°C (69°F), peaking at a delightful 31°C (88°F). These figures reflect a significant transition from the frigid winter months, where temperatures plummet as low as -19°C (-2°F) in January. The balmy weather invites residents and visitors alike to explore outdoor festivals and lush parks, making it an ideal time to experience the city’s vibrant culture. As the warmest month in Sapporo, August embodies the seasonal shift that captures the essence of summer, setting the stage for the cool autumn ahead.

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

The chart illustrates August temperature patterns in Sapporo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sapporo, 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).
JanFebMarAprMayJunJulAugSepOctNovDec212232415359686963513926
Data source: Temperature data for Sapporo generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Sapporo

In August, Sapporo experiences a notable peak in precipitation, with an average of 183 mm (7.2 in) over the course of the month, making it the wettest time of the year. This hefty rainfall typically spans 14 days, contributing to the lush landscapes characteristic of the region during summer. Following a gradual increase from 56 mm in January to 113 mm in July, August marks a significant jump, signaling the height of the monsoon season. Interestingly, as the city transitions into autumn, precipitation levels begin to taper, dropping to 126 mm in September. This trend highlights the seasonal variations that define Sapporo's climate, where mid-summer moisture culminates in August before giving way to drier, cooler months ahead.

August Precipitation Trends in Sapporo

The chart displays monthly precipitation patterns in Sapporo, 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 Sapporo, August typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec566386879412311318312612011779
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Sapporo

In August, Sapporo, Japan, experiences its peak humidity, soaring to a notable 95%. This high level of humidity is part of a warm and muggy summer, following similarly elevated readings in July, which sees humidity levels at 93%. As the year progresses, there is a clear trend of increasing humidity from the drier winter months of January and February, both hovering around 84% to 83%, through to the lush green of summer. The pattern subtly shifts as the seasons change, with September seeing a decrease to 88%, signaling a transition to the crisp autumn air. This cyclical rise and fall reflects Sapporo's characteristic climate, where summer means not just warmth but also a significant embrace of moisture in the air.

August Average Humidity in Sapporo

This chart illustrates the average monthly humidity levels in Sapporo, 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 Sapporo is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%81%81%86%87%93%95%88%83%79%80%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Sapporo

In August, Sapporo, Japan, experiences its peak UV Index, reaching a striking 10, categorized as very high. This significant increase from the previous months indicates a heightened risk for skin damage, with a mere 15 minutes of unprotected sun exposure enough to lead to burns. The trend for the summer months shows a gradual climb in UV levels, with May through July maintaining a UV Index of 9. This emphasizes the importance of sun protection throughout the summer, especially as the warm weather invites outdoor activities. As Sapporo transitions to September, the UV Index drops to 8, but it's still essential to remain vigilant. For detailed information on daily UV levels and safety tips, visit Sapporo UV Index.

Maximum UV Index Levels in Sapporo for August

The chart shows the monthly maximum UV Index (UVI) for Sapporo 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 Sapporo typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2367999108532
Data source: Sapporo 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 Sapporo

In Sapporo, Japan, August basks in a generous 292 hours of sunshine, positioning it as one of the year's sunniest months. Following a vibrant July with its peak of 321 hours, August experiences a slight dip in sunshine yet maintains a robust brightness that invites both locals and visitors to enjoy the lush landscapes and lively festivals. This season is a continuation of the warming trend initiated in spring, where each month from March onward has seen steadily increasing hours of sunlight, culminating in a glorious summer. As September approaches, the sunshine begins to wane, dropping to 269 hours, but the lingering warmth of August leaves a memorable imprint on Sapporo’s summer ambiance.

Monthly Sunshine Duration in Sapporo: August Highlighted

The August sunshine duration represents the total number of hours Sapporo 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.
JanFebMarAprMayJunJulAugSepOctNovDec133h189h243h287h309h297h321h292h269h234h177h163h
Data source: Sapporo August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Sapporo During August

August in Sapporo offers a moderate chance of sunny weather at 28%, which is slightly lower than the summer months of July (39%) and June (42%). This suggests that while August retains some of the summer sunshine, it often gives way to occasional showers and overcast skies as autumn approaches. In contrast to spring, where the likelihood of sunny days steadily increases, August sees a slight dip after the peak of summer. This fluctuation highlights the transitional nature of late summer in Sapporo, where warm days can quickly shift to more variable weather patterns. Adventure seekers should plan accordingly, embracing both the sunny moments and the playful summer rain.

Percentage of Sunny Days in August in Sapporo

The chart illustrates the percentage of sunny days in Sapporo 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 Sapporo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec29%25%35%40%24%42%39%28%32%32%35%32%
Data source: Sapporo August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Sapporo in August

In Sapporo, Japan, August marks a delightful transition in daylight duration, with 13 hours of sunlight illuminating the city. Following the peak of 15 hours in June, the days begin to gently shorten, reminiscent of the gradual fading of summer. This trend continues as daylight slips to 14 hours in July, offering long, beautiful evenings perfect for outdoor activities. As autumn approaches, September sees a decrease to 12 hours, signaling the end of those blissful summer nights. The overall pattern reveals the ebb and flow of daylight throughout the year, with Sapporo enjoying its longest days in the vibrant summer months before shifting towards the cozy embrace of fall.

Average Daylight Hours in Sapporo for August

The chart illustrates the variation in daylight duration in Sapporo throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 23m10h 30m11h 56m13h 24m14h 39m15h 17m14h 58m13h 52m12h 28m11h9h 43m9h 2m
Data source: Sapporo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Sapporo

In August, the average wind speed in Sapporo, Japan, dips to a gentle 2.3 m/s (5 mph), mirroring the tranquil summer atmosphere of the city. This slight decrease follows a modest trend observed throughout the warmer months, as July also recorded a similar speed, emphasizing a serene climate ideal for outdoor activities. Interestingly, the wind picks up again in September, reaching 2.5 m/s, suggesting that while August may feel calmer, a breath of invigorating air is just around the corner. Overall, this tranquil breeze characterizes Sapporo's summer months, offering a perfect backdrop for leisurely strolls and seasonal festivities.

Average August Wind Speed in Sapporo

The chart displays monthly wind speed patterns in Sapporo, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.93.12.93.32.92.32.42.3 m/s2.52.62.93.0
Data source: Sapporo August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Sapporo Compares to Other Months

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

August and January present stark contrasts in weather conditions. In August, temperatures range from a minimum of 10°C (51°F) to a maximum of 31°C (88°F), with an average of 21°C (69°F). The month experiences high humidity at 95% and considerable rainfall, averaging 183 mm (7.2 in) over 14 days. Conversely, January brings much colder temperatures, with a minimum of -19°C (-2°F) and a maximum of just 4°C (40°F), leading to an average of -6°C (21°F). Precipitation decreases to 56 mm (2.2 in) over 13 days, and humidity drops to 84%. For more details on winter weather conditions, you can explore Sapporo weather in January.

August and February present strikingly contrasting weather conditions. In August, temperatures range from a mild 10°C (51°F) at night to a warm 31°C (88°F) during the day, with an average of 21°C (69°F). The month also experiences high humidity levels of 95% and significant rainfall, totaling 183 mm (7.2 in) across 14 days. In contrast, February is much colder, with temperatures dipping as low as -17°C (2°F) and averaging around -5°C (23°F), reaching up to 5°C (42°F) at best. This month sees only 63 mm (2.5 in) of precipitation over 18 days and lower humidity at 83%. For more specific details on February's weather, check out Sapporo weather in February.

August and March in Sapporo present strikingly contrasting weather conditions. In August, temperatures range from a mild 10°C (51°F) to a warm 31°C (88°F), with an average of 21°C (69°F). The month is characterized by high humidity at 95% and considerable precipitation, totaling 183 mm (7.2 in) over 14 days. In contrast, March sees much colder temperatures, with a minimum of -13°C (9°F) and a maximum of 14°C (58°F), averaging around 0°C (32°F). Precipitation in March is significantly less, at 86 mm (3.4 in) over the same number of days, and the humidity level is lower, at 81%. For more information about the weather specifics in March, you can refer to Sapporo weather in March.

In comparing the weather of August and April, it's clear that August is significantly warmer, with average temperatures ranging from a minimum of 10°C (51°F) to a maximum of 31°C (88°F). In contrast, April presents much cooler conditions, with temperatures ranging from a low of -6°C (21°F) to a high of 20°C (69°F). August also experiences a much higher level of humidity at 95%, compared to April’s 81%. Additionally, while August sees a considerably greater amount of precipitation at 183 mm (7.2 in) over 14 days, April's rainfall is more moderate at 87 mm (3.4 in) over 13 days. For more detailed information, you can check Sapporo weather in April.

When comparing the weather in August and May, it's clear that August is significantly warmer, with average temperatures ranging from a low of 10°C (51°F) to a high of 31°C (88°F). In contrast, May experiences cooler temperatures, with a minimum of 2°C (36°F) and an average of 12°C (53°F). Additionally, August sees a higher amount of precipitation, totaling 183 mm (7.2 in) over 14 days, compared to May's 94 mm (3.7 in) over just 12 days. Humidity levels also rise in August, reaching 95%, compared to May's 86%. For a closer look at the conditions in May, you can refer to the link: Sapporo weather in May.

When comparing the weather in August to that of June, we find that August is significantly warmer, with average temperatures reaching 21°C (69°F) and maximums soaring to 31°C (88°F). In contrast, June has a milder climate, with average temperatures around 15°C (60°F) and maximums peaking at 26°C (80°F). Additionally, August experiences higher humidity levels at 95%, compared to June's more comfortable 87%. Precipitation is also greater in August, totaling 183 mm (7.2 in) over 14 days, compared to June's 123 mm (4.8 in) over 12 days. For more details on June's weather specifics, you can check Sapporo weather in June.

In comparing the weather of August and July, we observe that both months experience similar temperature ranges, with maximums reaching up to 31°C (88°F). However, August tends to be slightly warmer on average, with an average temperature of 21°C (69°F) compared to July's 20°C (68°F). Precipitation levels are notably higher in August, with 183 mm (7.2 in) falling over 14 days, compared to July's 113 mm (4.5 in) over 12 rainy days. Humidity also increases in August, reaching a notable 95%, slightly edging out July's 93%. For a more detailed overview of July’s weather, you can check Sapporo weather in July.

August tends to be the hottest month, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 31°C (88°F) and an average of 21°C (69°F). It also experiences significant rainfall, with 183 mm (7.2 in) over 14 days, accompanied by high humidity levels of 95%. In contrast, September sees a noticeable drop in temperatures, with a minimum of 4°C (40°F), an average of 17°C (63°F), and a maximum of 29°C (84°F). Rainfall decreases to 126 mm (5.0 in), but it still spans 14 days with humidity dropping to 88%. For more detailed information, check out Sapporo weather in September.

In August, the weather is typically warm, with temperatures ranging from a minimum of 10°C (51°F) to a maximum of 31°C (88°F), and an average of 21°C (69°F). This month also experiences high humidity at 95%, with significant rainfall totaling 183 mm (7.2 in) over about 14 days. In contrast, October brings cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 24°C (76°F), averaging at 11°C (52°F). While October sees less precipitation at 120 mm (4.7 in), it is still rainy on approximately 17 days, accompanied by lower humidity levels of 83%. For a detailed look at October weather specifically in Sapporo, visit Sapporo weather in October.

August and November present strikingly different weather patterns. August boasts warm temperatures with a minimum of 10°C (51°F), an average of 21°C (69°F), and a maximum of 31°C (88°F). It is characterized by high humidity at 95% and considerable rainfall, accumulating around 183 mm (7.2 in) over approximately 14 days. In contrast, November experiences a significant drop in temperatures, with a minimum of -8°C (18°F), an average of 4°C (39°F), and a maximum of 17°C (62°F). Although precipitation is lower at 117 mm (4.6 in), it occurs more frequently over 20 days, and humidity levels are reduced to 79%. For a closer look at what to expect during this transition to winter, explore Sapporo weather in November.

August and December in Sapporo present strikingly contrasting weather conditions. In August, temperatures range from a minimum of 10°C (51°F) to a maximum of 31°C (88°F), with an average of 21°C (69°F), and the air is quite humid at 95%. This month also sees considerable precipitation, totaling 183 mm (7.2 in) over approximately 14 days. In contrast, December brings frigid temperatures, with a minimum of -15°C (6°F) and a maximum of 11°C (53°F), averaging around -3°C (26°F). While precipitation is less intense at 78 mm (3.1 in), it occurs over more days—about 22—with humidity dropping to 80%. For more details on the winter weather, you can check Sapporo weather in December.

Compare Sapporo's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Sapporo

August in Sapporo presents a vivid contrast to the cooler months of the year, characterized by warmer temperatures and heightened humidity, making it one of the warmest months. While daytime highs can reach a toasty 31°C (88°F), the sultry atmosphere is often accompanied by significant rainfall, with 183 mm of precipitation spread across approximately 14 days. This increased moisture not only elevates the humidity to around 95%, but also contributes to the lush vibrancy of the city's landscapes. For those seeking a balance of summer warmth and refreshing rain, August offers a unique experience. To learn more about Sapporo's weather patterns throughout the year, visit Sapporo Climate.