July Weather in Yamaguchi, Japan

Last updated: August 21, 2025

In July, Yamaguchi, Japan experiences a warm and humid climate, with temperatures peaking at a sweltering 37°C (99°F) and averaging around 26°C (80°F). Nights offer a mild respite, with lows dipping to 17°C (63°F). This month sees significant rainfall, accumulating to 340 mm (13.4 in) across approximately 20 days, creating a lush environment amidst the heat. With humidity often soaring to 95%, visitors can expect a tropical atmosphere, making it essential to stay hydrated and prepared for the seasonal downpours.

July Temperature in Yamaguchi

In July, Yamaguchi, Japan, transforms into a sweltering summer haven, with temperatures soaring. The month brings a minimum of 17°C (63°F), coupled with an average high of 26°C (80°F), and an impressive peak reaching 37°C (99°F). This significant jump from the cooler June averages highlights the shift into the heart of summer, marking July as one of the hottest months of the year. As the humidity rises alongside the heat, residents and visitors alike seek refuge in shaded spots or cool indoor areas, embracing the vibrant energy of summer festivals that fill the streets with life. The warmth not only sets the stage for outdoor activities but also influences the region's lush greenery and blooming scenery, painting a vivid backdrop for unforgettable experiences in Yamaguchi.

July Weather in Yamaguchi: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Yamaguchi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yamaguchi, July 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).
JanFebMarAprMayJunJulAugSepOctNovDec424351586672798275655545
Data source: Temperature data for Yamaguchi 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.

July Precipitation in Yamaguchi

In Yamaguchi, Japan, July marks a significant peak in precipitation, with a staggering 340 mm (13.4 in) of rain typically falling over 20 days. This deluge is a stark contrast to the milder months preceding it; for instance, June receives 198 mm (7.8 in) of rain across just 13 days. The trend suggests a gradual buildup of moisture that culminates in a dramatic summertime surge, not unlike a tropical monsoon. Following July, August still sees substantial rainfall at 265 mm (10.4 in), but with fewer rainy days, indicating a slightly less intense weather pattern. Overall, July stands out as a month of notable hydrological activity, characterizing Yamaguchi's summer climate as vibrant and dynamic.

July Precipitation Trends in Yamaguchi

The chart displays monthly precipitation patterns in Yamaguchi, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Yamaguchi, July typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec58781301221361983402652401204167
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

July Humidity in Yamaguchi

In Yamaguchi, Japan, July brings the peak of summer humidity, soaring to a sweltering 95%. This month marks the culmination of a steady rise in moisture levels, starting from a more moderate 69% in March and escalating with each passing month, particularly noticeable in the jump from June's 88% to July. Following the high, humidity remains elevated in August at 93%, but begins its gradual descent as the year progresses, signaling the transition into autumn. The trend illustrates a clear seasonal pattern where early summer leads to markedly humid conditions, creating a lush atmosphere that characterizes this vibrant region.

July Average Humidity in Yamaguchi

This chart illustrates the average monthly humidity levels in Yamaguchi, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Yamaguchi is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%72%69%75%84%88%95%93%84%79%76%75%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Yamaguchi

In July, Yamaguchi, Japan, experiences a staggering UV Index of 12, placing it in the extreme exposure category. This level of intensity signifies that even minimal sun exposure can lead to skin damage in just 10 minutes, necessitating enhanced precautions for outdoor activities. The trend leading up to July shows a steady increase in UV exposure, particularly from March's moderate levels, rising sharply through April and May to reach extremes by mid-year. Comparatively, the summer months of July and August remain the most critical, maintaining that high index and demanding vigilance against sunburn. To explore more about the UV Index trends throughout the year, check out Yamaguchi UV Index.

Maximum UV Index Levels in Yamaguchi for July

The chart shows the monthly maximum UV Index (UVI) for Yamaguchi in July, 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 July, the maximum UV index in Yamaguchi typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458111111121210763
Data source: Yamaguchi July 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.

July Sunshine in Yamaguchi

In Yamaguchi, Japan, July brings a delightful continuation of summer sunshine, with residents basking in approximately 280 hours of radiant daylight. This month is part of a trend that sees sunlight peaking during the warmest weeks of the year, following a steady rise from January's 174 hours. Interestingly, while July's sunshine is slightly less than June's 291 hours, it marks a transition to even brighter days ahead in August, which boasts an impressive 303 hours. This pattern highlights the vibrant energy of summer, where longer days and increased sunlight create an inviting atmosphere for outdoor activities and exploration. The sunshine not only brightens the landscape but also elevates the spirits of the locals, making Yamaguchi a quintessential summer destination.

Monthly Sunshine Duration in Yamaguchi: July Highlighted

The July sunshine duration represents the total number of hours Yamaguchi experiences direct sunlight during the month of July, excluding cloudy or obstructed periods. This chart compares the sunshine duration of July with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec174h229h264h280h300h291h280h303h257h256h234h211h
Data source: Yamaguchi July Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Yamaguchi During July

In Yamaguchi, Japan, the likelihood of sunny weather takes a noticeable dip during July, with only 22% chance of sun. This marks a significant decrease from the preceding months, particularly June's 27%. A trend emerges as we move toward the peak of summer; July, typically characterized by humidity and precipitation, stands out as the month where sunny days are least likely. This shift continues into August, which offers a marginally better 25% chance of sunshine. Overall, while July might be anticipated for warmth, it seems to favor clouds over clear skies, making it a period where indoor activities may become more appealing.

Percentage of Sunny Days in July in Yamaguchi

The chart illustrates the percentage of sunny days in Yamaguchi throughout the year, with July 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 Yamaguchi experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec36%45%37%47%31%27%22%25%30%58%47%44%
Data source: Yamaguchi July chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Yamaguchi in July

In Yamaguchi, Japan, the month of July enjoys a splendid 14 hours of daylight, mirroring the brightness of June. This peak in sunshine signals the height of summer, offering longer days that encourage outdoor activities and community events. Following this radiant month, daylight gradually begins to ebb in August, with 13 hours remaining, leading to a gentle transition into autumn. Observing the yearly pattern, daylight in Yamaguchi increases steadily from 10 hours in the winter months of January and February, reaching a vibrant maximum in the summer before tapering off into the shorter days of fall and winter. This rhythmic cycle of daylight not only shapes the daily lives of residents but also highlights the beauty of seasonal change in this picturesque region.

Average Daylight Hours in Yamaguchi for July

The chart illustrates the variation in daylight duration in Yamaguchi throughout the year, with July highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 8m10h 56m11h 58m13h 2m13h 56m14h 22m14h 9m13h 22m12h 21m11h 18m10h 22m9h 54m
Data source: Yamaguchi daylight hours, calculated by summing the hours between sunrise and sunset for each day.

July Winds in Yamaguchi

In July, Yamaguchi experiences a notable dip in wind speed, averaging just 2.2 m/s (5 mph), making it one of the calmest months of the year. This decline continues the trend established in previous months, where June recorded 2.6 m/s and May was even lower at 2.9 m/s. The gentle breezes of July, softer than those found in the earlier winter months, create a tranquil atmosphere that contrasts sharply with the more dynamic winds of January and February, which tripled the July figures. As summer peaks, the mild winds invite outdoor relaxation and highlight the region's lush landscapes, embodying the serene essence of a Japanese summer. Observing this trend reveals how wind patterns shift throughout the year, contributing to the unique climatic character of Yamaguchi.

Average July Wind Speed in Yamaguchi

The chart displays monthly wind speed patterns in Yamaguchi, with values for each month shown alongside July's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how July's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.23.53.13.22.92.62.2 m/s2.72.62.42.93.3
Data source: Yamaguchi July wind data, generated using information from the Copernicus Climate Change Service.

How July Weather in Yamaguchi Compares to Other Months

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

In July, the weather is typically hot and humid, with temperatures ranging from a minimum of 17°C (63°F) to a scorching maximum of 37°C (99°F) and an average of 26°C (80°F). This month also witnesses considerable rainfall, totaling 340 mm (13.4 in) over about 20 days, creating a steamy atmosphere with 95% humidity. In stark contrast, January brings much cooler conditions, with temperatures dropping to a minimum of -4°C (25°F) and a maximum of 16°C (60°F), averaging just 5°C (42°F). The winter month sees much less precipitation at 58 mm (2.3 in) across roughly 9 days, accompanied by lower humidity levels at 76%. For more details on January weather, check Yamaguchi weather in January.

July and February present a stark contrast in weather conditions. In July, temperatures range from a minimum of 17°C (63°F) to a maximum of 37°C (99°F), with an average of 26°C (80°F). The month is marked by high humidity at 95% and substantial rainfall, totaling 340 mm (13.4 in) over 20 days. In contrast, February brings much cooler temperatures, with a minimum of -3°C (27°F), an average of 6°C (43°F), and a maximum of 22°C (71°F). Precipitation is significantly lower, at 78 mm (3.1 in) over just 9 days, and humidity sits at a more moderate 72%. For more details on February weather, you can visit Yamaguchi weather in February.

In July, the weather is characterized by soaring temperatures, with nighttime lows averaging around 17°C (63°F) and peaks reaching up to 37°C (99°F), creating a hot and humid atmosphere with an average humidity of 95%. In contrast, March experiences much cooler conditions, with minimum temperatures dipping to -1°C (31°F) and maximums only reaching 22°C (72°F). Additionally, March has significantly less rainfall, averaging 130 mm (5.1 in) over just 12 days, compared to July's heavy precipitation of 340 mm (13.4 in) over 20 days. For more specific insights into March weather, you can refer to Yamaguchi weather in March.

When comparing the weather between April and July, it's clear that July is significantly warmer and more humid. With temperatures ranging from a minimum of 17°C (63°F) to a scorching maximum of 37°C (99°F), July averages a high of 26°C (80°F), while April experiences milder conditions, with temperatures varying from 1°C (34°F) to 26°C (79°F) and an average of 14°C (58°F). Rainfall also differentiates the two months; July sees substantial precipitation at 340 mm (13.4 in) over 20 days, compared to April's 122 mm (4.8 in) over just 10 days. Additionally, the humidity is notably higher in July, reaching 95%, compared to April's 75%. For more detailed information about April's weather, you can visit Yamaguchi weather in April.

July weather is significantly warmer and more humid compared to May, with temperatures ranging from a minimum of 17°C (63°F) to a scorching maximum of 37°C (99°F) and an average of 26°C (80°F). In contrast, May sees much cooler temperatures, from a minimum of 5°C (42°F) to a maximum of 30°C (87°F), with an average of 19°C (67°F). Additionally, July is marked by higher precipitation, with 340 mm (13.4 in) falling over 20 days, whereas May experiences only 136 mm (5.4 in) over 11 days. The humidity is also notably higher in July at 95%, compared to May's 84%. For more details on the weather conditions in May, you can visit Yamaguchi weather in May.

July is notably warmer and wetter than June, with minimum temperatures starting at 17°C (63°F) compared to June's 12°C (54°F). The average temperature in July reaches 26°C (80°F), while June's average is slightly cooler at 22°C (73°F). Maximum temperatures soar to 37°C (99°F) in July, significantly higher than June's peak of 31°C (89°F). In addition, July experiences increased precipitation, with 340 mm (13.4 in) over 20 days, contrasting with June's 198 mm (7.8 in) over just 13 days. Humidity also rises in July to a sticky 95%, compared to June's 88%. For more details, check out Yamaguchi weather in June.

July and August both bring warm weather, but August tends to be slightly hotter with an average temperature of 28°C (83°F) compared to July's 26°C (80°F). The maximum temperatures peak at 38°C (100°F) in August, just above July's 37°C (99°F). Precipitation levels, however, decrease in August to 265 mm (10.4 in) over 15 days, while July experiences significantly higher rainfall at 340 mm (13.4 in) spread over 20 days. Humidity remains relatively high in both months but is marginally lower in August at 93% compared to 95% in July. For more detailed information, check out Yamaguchi weather in August.

July and September present notably different weather patterns. In July, temperatures soar, with lows around 17°C (63°F) and highs reaching a sweltering 37°C (99°F), accompanied by high humidity at 95%. The month experiences significant rainfall, with about 340 mm (13.4 in) over approximately 20 days, making it a particularly wet month. In contrast, September offers a milder climate with average temperatures dropping to around 24°C (75°F). Minimum temperatures fall to 13°C (56°F), and the maximums are still warm at 35°C (95°F). Rainfall decreases to 240 mm (9.4 in) over just 14 days, and humidity decreases to 84%, making it a more comfortable time of year. For more detailed weather information, you can explore Yamaguchi weather in September.

July and October present strikingly different weather patterns. In July, temperatures can soar with a minimum of 17°C (63°F) and peaks reaching up to 37°C (99°F), averaging around 26°C (80°F). The month is characterized by heavy rainfall, receiving about 340 mm (13.4 in) over approximately 20 days, coupled with high humidity levels of 95%. In contrast, October experiences a significant drop in temperature, with a minimum of 8°C (46°F) and a maximum of 30°C (87°F), averaging 19°C (66°F). Rainfall is also lighter in October, with only 120 mm (4.7 in) over about 10 days and a decrease in humidity to 79%. For more details, you can check Yamaguchi weather in October.

In July, the weather is characterized by warm temperatures, with average highs reaching up to 37°C (99°F) and a high humidity level of 95%, making it feel quite muggy. Accompanied by significant rainfall totaling 340 mm (13.4 in) over 20 days, July can be a rather wet month. In contrast, November presents a much cooler climate, where temperatures range from a minimum of 0°C (32°F) to an average of 13°C (55°F) and maxing out at 25°C (78°F). With only 41 mm (1.6 in) of precipitation over just 5 days and a lower humidity level of 76%, November offers a more comfortable and drier experience. For more details about the weather specifics in November, you can refer to Yamaguchi weather in November.

July and December present starkly contrasting weather conditions. In July, temperatures soar with a minimum of 17°C (63°F) and an average of 26°C (80°F), reaching highs of up to 37°C (99°F). This month is characterized by heavy rainfall, totalling 340 mm (13.4 in) over about 20 days, coupled with high humidity levels at 95%. Conversely, December experiences a much cooler climate, with temperatures ranging from a minimum of -1°C (31°F) to an average of 7°C (46°F), peaking at 21°C (70°F). Precipitation drops significantly to 67 mm (2.6 in) spread over just 8 days, and humidity levels moderate to 75%. For more details about the December weather, you can visit Yamaguchi weather in December.

Compare Yamaguchi's Climate with Cities Worldwide

Conclusion: What to Expect From July Weather in Yamaguchi

In July, the weather in Yamaguchi stands out with its scorching temperatures that can soar up to 37°C (99°F), making it the warmest month of the year. This month also brings a significant uptick in humidity, often reaching a tropical 95%, which can create a heavy, sultry atmosphere. Unlike the drier months, July experiences an average of 20 days of rain, contributing to a total precipitation amount of 340 mm (13.4 in), resulting in lush greenery and vibrant landscapes. Travelers should be prepared for a mix of sweltering heat and frequent showers, contrasting sharply with the more temperate conditions of other months. For more insights into the climate variations throughout the year, check out Yamaguchi Climate.