Last updated: August 21, 2025
In August, Hayama, Japan, experiences a blend of warm temperatures and humidity, creating a unique summer atmosphere. The maximum temperature can reach 31°C (87°F), while the average hovers around 27°C (80°F), ensuring plenty of warmth for outdoor activities. However, nights cool off to a pleasant minimum of 21°C (70°F). This month also sees significant precipitation, with an average of 129 mm (5.1 in) over 12 days, contributing to the region's lush landscapes. With humidity levels soaring at 90%, visitors can expect a tropical feel, enhancing the vibrant allure of Hayama’s summer.
In August, Hayama, Japan, basks in the warmth of summer, with temperatures reaching a maximum of 31°C (87°F). The month starts with a minimum temperature of 21°C (70°F), transitioning to an average of 27°C (80°F), making it one of the hottest times of the year. This notable rise from the previous months highlights a consistent upward trend, as the temperature records showcase a gradual increase through the summer, starting from 19°C (66°F) in July. As the days progress, the heat not only invites locals and visitors to enjoy beach activities, but also signifies the peak of summer's vibrant energy in this beautiful coastal town. The gentle sea breeze offers a refreshing contrast, ensuring that while the warmth is palpable, it remains a pleasant escape from the bustling city life.
In August, Hayama, Japan experiences significant rainfall, accumulating 129 mm (5.1 in) over an average of 12 rainy days. This amount reflects a slight decrease from the previous month's peak of 226 mm in July, which is typically the wettest period of the year. Nonetheless, August still maintains a robust level of precipitation, setting the tone for the wetter autumn months ahead. As we move into September, the rainfall increases again, reaching 208 mm, hinting at the transitioning seasonal patterns that characterize this coastal region. Overall, while August shows a moderate precipitation trend, it acts as a precursor to the more substantial downpours that follow.
In August, Hayama, Japan, experiences a high humidity level of 90%, maintaining the lingering remnants of the intense summer heat. This month sits just below the peak of 93% recorded in July, illustrating the subtropical climate's influence in the region. As the summer progresses from June's sweltering 88%, humidity rises steadily, reinforcing the notion of a humid coastal environment. Following August, September sees a slight decrease to 86%, indicating a gradual transition towards the cooler fall months. Overall, the humidity trends in Hayama reveal a characteristic pattern of elevated moisture levels during the summer, giving way to more moderate conditions as the seasons shift.
In August in Hayama, Japan, the UV Index remains high, consistently at 11, which places it in the extreme exposure category. This trend continues from the previous months of June and July, where residents and visitors alike must be particularly cautious, as the recommended burn time is a mere 10 minutes. The summer months bring a sharp increase in UV levels, peaking in May and sustaining through August, reflecting a season that demands heightened vigilance for sun protection. As the intensity of sun exposure diminishes in September, a notable drop to a UV Index of 10 signifies a transition, but for August, the sun is unforgiving. Stay informed and protect your skin; for more details, check out the Hayama UV Index.
UV Risk Categories
August shines brightest in Hayama, Japan, boasting an impressive 297 hours of sunshine that outshines every other month. This peak contrasts beautifully with the gradual increase seen throughout the spring and early summer, where the hours climbed steadily from 255 in March to 262 in June. Although July experiences a slight drop to 249 hours, it sets the stage for an exhilarating August basking in the summer sun. Following this sun-soaked month, September offers a gentle decline to 239 hours, signaling the transition into autumn while still retaining a generous amount of sunlight. Overall, Hayama enjoys a vibrant tapestry of sunshine hours, making August a true highlight of the year.
In August, Hayama, Japan, experiences a 38% chance of sunny weather, which suggests a notable decline in sunshine compared to the earlier months of the year. Following the peak sun probabilities in January (53%) and February (64%), the likelihood begins to decrease significantly through spring and into the summer. July hits a low of 35%, and August continues this trend, indicating that while sun-drenched days are still possible, they become less frequent as summer wanes. As we transition into the fall months, the odds of sunny days improve again, with October rising to 48% and November hitting 62%. Thus, for those planning to be outdoors in August, it might be wise to prepare for a mix of cloudy skies amidst the occasional sunny respite.
In Hayama, Japan, August marks a gentle transition in daylight duration, offering approximately 13 hours of sunlight—a slight decrease from the peak of 14 hours experienced during the heart of summer in June and July. This pattern reveals a graceful shift as the days begin to shorten, paving the way for the approach of autumn. Following the vibrant months of May through July, where daylight flourishes, the gradual decline in light hours during August signals a subtle shift in the seasonal rhythm, with September promising a further reduction to 12 hours, continuing the annual ebb and flow of daylight as the year progresses. The early months of winter will soon bring daylight down to just 9 hours in December, highlighting a striking contrast to the long, sunlit days of summer.
In August, Hayama experiences a pleasant average wind speed of 5.0 m/s (11 mph), providing a refreshing breeze during the summer heat. Notably, this month showcases a slight increase from the slower winds of July, which averaged just 3.3 m/s (7 mph). As the summer transitions into autumn, the winds in Hayama begin to pick up, with speeds rising again in September to 5.2 m/s (12 mph). This pattern reflects a seasonal variation where the gentle, calming breezes of summer give way to a bit more vigor as cooler months approach. Overall, August stands out as a harmonious blend of warm weather and just enough wind to enhance the coastal charm of this picturesque Japanese locale.
Weather in Hayama varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Hayama, focusing on differences in temperature, rainfall, humidity, and UV levels.
August typically presents a warm and humid climate, with average temperatures hovering around 27°C (80°F) and maximums reaching up to 31°C (87°F). The month experiences significant rainfall, averaging 129 mm (5.1 in) over approximately 12 days, contributing to a high humidity level of 90%. In stark contrast, January offers a much cooler experience, with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 18°C (64°F), and an average of about 8°C (47°F). Precipitation is lower in January, totaling 64 mm (2.5 in) over just 6 days, and the humidity is comparatively lower at 76%. For more detailed information, you can check Hayama weather in January.
August and February present strikingly different weather patterns. In August, temperatures soar with a minimum of 21°C (70°F) and a maximum of 31°C (87°F), resulting in an average of 27°C (80°F). This month typically experiences high humidity levels at 90% and significant rainfall of 129 mm (5.1 in) over about 12 days. In contrast, February is much cooler, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 17°C (63°F), leading to an average of just 8°C (47°F). The winter month sees much less precipitation, totaling 62 mm (2.4 in) over around 8 days, and lower humidity at 74%. For a closer look at February weather conditions, check Hayama weather in February.
In August, the weather is significantly warmer, with temperatures ranging from a minimum of 21°C (70°F) to a maximum of 31°C (87°F) and an average of 27°C (80°F). The humidity is quite high at 90%, and there are 12 days of precipitation totaling 129 mm (5.1 in). In contrast, March brings much cooler temperatures, with a minimum of 3°C (38°F), an average of 11°C (52°F), and a maximum of 19°C (66°F). Despite having the same number of rainy days, March sees higher precipitation at 172 mm (6.8 in) and lower humidity at 70%. For more detailed information, you can check out Hayama weather in March.
August and April present contrasting weather conditions, emphasizing the shift from spring to summer. In August, temperatures soar with an average of 27°C (80°F) and highs reaching up to 31°C (87°F), creating a warm and humid environment with humidity levels around 90%. In contrast, April offers a much cooler climate, with average temperatures around 14°C (58°F), peaking at 21°C (70°F) during the day. Both months experience similar rainfall, averaging 129 mm (5.1 in) in August and slightly more at 141 mm (5.5 in) in April, but April's lower humidity of 74% feels less oppressive. For a closer look at the unique conditions of April, you can check Hayama weather in April.
In August, the weather is significantly warmer than in May, with temperatures ranging from a minimum of 21°C (70°F) to a maximum of 31°C (87°F), averaging around 27°C (80°F). In contrast, May experiences milder conditions, with temperatures fluctuating between 12°C (54°F) and 23°C (74°F), averaging 18°C (65°F). While both months see a fair amount of precipitation, August has slightly less, with 129 mm (5.1 in) over 12 days compared to May's 148 mm (5.8 in) over 11 days. Additionally, August tends to be more humid, with humidity levels reaching 90%, versus 81% in May. For a detailed look at May weather, you can check Hayama weather in May.
In comparing the weather between June and August, August typically offers warmer temperatures, with a minimum of 21°C (70°F) and an average of 27°C (80°F), contrasted with June's lower minimum of 16°C (62°F) and average of 21°C (70°F). While August experiences slightly fewer rainy days at 12, it still accumulates notable precipitation, totaling 129 mm (5.1 in). In June, however, rainfall is more substantial at 197 mm (7.8 in) over 13 days, contributing to a humid atmosphere with levels around 88%. Overall, August tends to be hotter and somewhat drier, while June is cooler and wetter. For more details on June weather, visit Hayama weather in June.
In comparing the weather of August and July, August tends to be slightly warmer, with average temperatures reaching 27°C (80°F) compared to July's average of 25°C (77°F). While both months experience substantial humidity, August's relative humidity is slightly lower at 90% compared to July's 93%. However, August has less precipitation overall, with 129 mm (5.1 in) over 12 days, whereas July sees a higher amount of rainfall, totaling 226 mm (8.9 in) over 17 days. For more details on July's weather, you can check Hayama weather in July.
August typically experiences warmer temperatures, with an average of 27°C (80°F) and a maximum reaching 31°C (87°F), while September sees a slight decrease, with average temperatures around 24°C (75°F) and a peak of 29°C (84°F). In terms of precipitation, September is noticeably wetter, receiving 208 mm (8.2 in) across 17 days compared to August's 129 mm (5.1 in) over 12 days. Humidity levels are also slightly lower in September, at 86%, compared to the high 90% in August. For more detailed information about September weather, you can visit Hayama weather in September.
In August, the weather is typically warm and humid, with average temperatures ranging from 21°C (70°F) to a peak of 31°C (87°F). This month also sees notable precipitation, with about 129 mm (5.1 in) falling over approximately 12 days, contributing to the high humidity levels of around 90%.
By contrast, October brings a significant drop in temperatures, averaging 20°C (68°F), with highs reaching up to 26°C (79°F) and lows around 13°C (56°F). However, this month is wetter, recording approximately 303 mm (11.9 in) of rain over 17 days. Despite the increased rainfall, the humidity is somewhat lower at 83%. For more details, you can check Hayama weather in October.
August and November present contrasting weather conditions. In August, temperatures are warm, with averages around 27°C (80°F) and highs reaching up to 31°C (87°F), accompanied by high humidity at 90%. Additionally, this month experiences significant rainfall, with around 129 mm (5.1 in) spread over 12 days. In contrast, November brings much cooler weather, with average temperatures dropping to 15°C (60°F) and highs of 21°C (71°F). While it still sees precipitation on 12 days, the amount decreases to 111 mm (4.4 in), and humidity levels drop to 80%. For more detailed information about November weather, you can check Hayama weather in November.
August and December present stark contrasts in weather conditions. August boasts warm temperatures, with an average of 27°C (80°F) and peaks reaching up to 31°C (87°F), all while maintaining high humidity levels at 90%. In contrast, December experiences much cooler temperatures, averaging 11°C (52°F), with highs only reaching 21°C (69°F) and lows dipping to 3°C (37°F). Additionally, while August receives more precipitation—129 mm (5.1 in) over 12 days—December is comparatively drier, with 82 mm (3.2 in) across 11 days, along with lower humidity at 78%. For those looking for more details on December's weather conditions, you can explore Hayama weather in December.
August in Hayama showcases a contrast to the cooler months, with its warmer temperatures and notably high humidity levels that create a tropical feel. While the average temperature reaches a balmy 27°C, the city experiences significant precipitation, spanning over half the month with around 12 rainy days. This combination of warmth and moisture adds a lush vibrancy to the surroundings, inviting both locals and visitors to enjoy the season’s unique charm. For a deeper dive into the climatic patterns of this picturesque coastal town, visit Hayama Climate.