Last updated: August 21, 2025
September in Ishikawa, Japan, offers a warm and humid climate, with maximum temperatures reaching 30°C (86°F) and an average of 28°C (82°F). The month brings a noticeable coolness as well, with lows dropping to a comfortable 24°C (75°F). However, visitors should be prepared for frequent rainfall, totaling 237 mm (9.3 in) across approximately 18 rainy days, contributing to the overall humidity level of 82%. This blend of warmth and moisture paints a vivid picture of early autumn in Ishikawa, making it a unique time to experience the region's lush landscapes and vibrant culture.
In Ishikawa, Japan, September marks a delightful transition as summer begins to wane, bringing warm yet comfortable temperatures. With a minimum of 24°C (75°F) and an average of 28°C (82°F), the month still boasts a maximum of 30°C (86°F), allowing for enjoyable outdoor activities against a backdrop of seasonal charm. This warmth signifies a slight decline from the peak heat of July and August, yet remains inviting for both locals and visitors. As the month progresses, you can expect a gradual cool-down leading into October, but September remains a vibrant time to experience Ishikawa’s natural beauty and rich culture.
September marks a notable transition in Ishikawa's precipitation patterns, as the region experiences an increase in rainfall compared to the summer months. With 237 mm (9.3 in) of precipitation, September becomes one of the wettest months of the year, showing a significant rise from August's 187 mm (7.4 in). This uptick is complemented by 18 rainy days, suggesting a persistent drizzle that characterizes the month's weather. As the rainy season continues to trend upward, September often becomes a vivid display of nature's palette, preparing the land for the upcoming autumn hues while bracing for the cooler months ahead.
As summer transitions into autumn, September in Ishikawa, Japan, witnesses a notable shift in humidity levels. Following the peak of 86% humidity in both June and July, the month settles at a comfortable 82%, similar to August's levels. This maintains the trend of high humidity observed during the warmer months, while still reflecting a slight decrease as the cooler weather approaches. October continues this trajectory with a further dip to 80%, heralding the onset of drier conditions. Overall, September serves as a bridging month, where the lingering warmth of summer begins to gracefully yield to the crispness of fall.
In September, Ishikawa, Japan, experiences a UV Index of 12, classifying it under the extreme exposure category, with a burn time reduced to just 10 minutes. This slight decline from the peak of 13 in the summer months indicates that while the sun remains intense, the urgency for sun protection begins to ease slightly as autumn approaches. As the seasons shift, it’s crucial for residents and visitors alike to remain vigilant against UV exposure, even as the days grow shorter. To stay informed on UV levels throughout the year, check out the Ishikawa UV Index for updated safety guidelines and recommendations.
UV Risk Categories
September in Ishikawa, Japan, is a stunning transition into autumn, boasting 295 hours of sunshine. This follows a vibrant summer, where July and August recorded peaks of 317 and 319 hours respectively, making them the sunniest months of the year. As the summer heat ebbs, September's sunshine remains plentiful, though slightly lower than its predecessors, signaling a gentle shift towards cooler days. The trend reveals a steady increase in daylight from the depths of winter, where January struggles with only 154 hours. As the year progresses, Ishikawa experiences a gradual crescendo of sunshine, peaking in late summer before a slight decline through autumn and into winter. This natural ebb and flow of sunlight not only enriches the landscape but also fosters a vibrant atmosphere in this charming region.
When contemplating the weather in Ishikawa, Japan, September emerges as a standout month, boasting a 61% chance of sunny days. This marks a notable increase compared to the preceding summer months, where the likelihood of sunshine hovered between 9% and 40%. As the peak heat of summer transitions into the gentler embrace of autumn, September not only invites warmth but also a refreshing vibrancy in the region's landscapes. This promising shift in weather patterns presents an ideal time for outdoor activities and enjoying the natural beauty of Ishikawa, making it a perfect month to bask in the balance of warmth and sun.
As summer fades into autumn, September in Ishikawa, Japan, brings a gentle transition in daylight hours, offering about 12 hours of sunlight. This marks a gradual decline from the peak daylight of 13 hours experienced in the summer months of June through August. Following the warmth and brightness of summer, September serves as a reminder of the changing seasons, as daylight gradually diminishes, dwindling further to 11 hours in October. Overall, the trend reveals a steady shift from the longer days of summer toward the shorter days of winter, highlighting the natural rhythm of Ishikawa’s beautiful climate.
As summer gives way to autumn in Ishikawa, Japan, September ushers in a noticeable shift in wind patterns, with average speeds dipping to 5.5 m/s (12 mph). This gentler breeze, markedly lower than the preceding months, invites a sense of tranquility as the region transitions into fall. The months leading up to September experienced higher wind speeds, peaking at 7.7 m/s (17 mph) in April and 7.5 m/s (17 mph) in July, creating lively, dynamic conditions perfect for summer activities. However, as the leaves begin to change and cooler temperatures approach, the more subdued winds of September herald a serene period of reflection and preparation for the invigorating gusts that return in October, climbing back up to 7.8 m/s (18 mph).
Weather in Ishikawa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ishikawa, focusing on differences in temperature, rainfall, humidity, and UV levels.
September weather is characterized by warm temperatures, with a minimum of 24°C (75°F) and an average high of 30°C (86°F). The month is also quite humid, with an average humidity of 82%, and experiences significant rainfall totaling 237 mm (9.3 in) over 18 days. In contrast, January brings much cooler temperatures, with a minimum of 12°C (53°F) and a maximum of 24°C (75°F), along with lower humidity at 71%. The precipitation in January is substantially reduced to 99 mm (3.9 in) over just 11 days, offering a much drier and fresher atmosphere. For more details on January weather, you can visit Ishikawa weather in January.
September and February showcase stark contrasts in weather. September typically boasts warmer temperatures, with averages around 28°C (82°F) and daily highs reaching up to 30°C (86°F). However, this warmth is accompanied by considerable rainfall, totaling 237 mm (9.3 in) over 18 days, and high humidity levels of 82%. In contrast, February presents a much cooler climate, where temperatures range from a minimum of 12°C (53°F) to an average of 18°C (65°F) and a maximum of 24°C (75°F). Precipitation in February is significantly lower at 98 mm (3.9 in) over 13 days, coupled with reduced humidity at 71%. For those interested in more details, visit Ishikawa weather in February.
September and March present contrasting weather patterns. In September, temperatures are warmer, with a minimum of 24°C (75°F) and an average of 28°C (82°F), reaching highs of 30°C (86°F). The month also experiences significant rainfall, totaling 237 mm (9.3 in) over 18 days, coupled with high humidity at 82%. In contrast, March offers a cooler climate, with minimum temperatures dropping to 14°C (57°F), an average of 20°C (68°F), and a maximum of 24°C (76°F). Precipitation is less frequent, totaling 109 mm (4.3 in) over 12 days, and humidity is slightly lower at 76%. For more details on March weather, you can visit Ishikawa weather in March.
In comparing the weather in September and April, September tends to be significantly warmer with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (86°F), while April offers cooler conditions with temperatures from a minimum of 15°C (60°F) to a maximum of 26°C (79°F). Additionally, September experiences a higher level of precipitation, with 237 mm (9.3 in) over 18 days compared to April's 146 mm (5.7 in) over just 12 days. Interestingly, both months have the same humidity level of 82%, but the overall feel is quite different, given the warmth and heavier rainfall commonly found in September. For more detailed information, you can check Ishikawa weather in April.
When comparing the weather in September and May, September tends to be warmer with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (86°F), while May sees slightly cooler temperatures, with a minimum of 19°C (66°F) and a maximum of 28°C (82°F). Both months experience significant rainfall, but September has higher precipitation levels, averaging 237 mm (9.3 in) over 18 days compared to May's 213 mm (8.4 in) over just 12 days. Humidity levels are similar, with September at 82% and May slightly higher at 84%. For more detailed insights, you can refer to Ishikawa weather in May.
In comparing the weather between September and June, both months exhibit warm temperatures, but September tends to be slightly hotter, with an average temperature of 28°C (82°F) compared to June’s 26°C (80°F). While June experiences a minimum temperature of 21°C (69°F), September starts at a higher minimum of 24°C (75°F). However, June brings more rainfall, with a total of 328 mm (12.9 in) spread across 20 days, whereas September has less precipitation at 237 mm (9.3 in) over 18 days. Humidity levels are also relatively high in both months, with September at 82% and June slightly higher at 86%. For a closer look at June weather specifics, you can visit Ishikawa weather in June.
In comparing the weather of September and July, it’s evident that both months experience warm temperatures, with September having slightly lower minimum and maximum temperatures than July. September's average temperature is 28°C (82°F), matching July’s average, while July boasts a minimum of 26°C (78°F) compared to September’s 24°C (75°F). However, September is characterized by higher precipitation, receiving 237 mm (9.3 in) over 18 days, while July sees less rain, totaling 180 mm (7.1 in) across 12 days. Additionally, humidity levels are slightly higher in July at 86%, compared to September’s 82%. For more details on July weather, you can visit Ishikawa weather in July.
In comparing the weather of September and August, both months exhibit similar average temperatures, with September showing a slight decrease in minimum temperature at 24°C (75°F) compared to August's 26°C (78°F). Both months reach a maximum of 30°C (86°F) and maintain consistent average temperatures around 28°C (82°F). However, September is notably wetter, experiencing 237 mm (9.3 in) of precipitation over 18 days, whereas August has 187 mm (7.4 in) of rainfall over 16 days. Humidity levels remain steady at 82% for both months, creating a persistent tropical feel. For a closer look at August conditions specifically, you can refer to Ishikawa weather in August.
September tends to be warmer and more humid compared to October, with average temperatures peaking at 28°C (82°F) and a maximum of 30°C (86°F). In contrast, October sees a slight dip in temperatures, averaging 26°C (78°F) with a maximum of 29°C (84°F). Additionally, September is marked by significantly higher precipitation, totaling 237 mm (9.3 in) over 18 days, while October experiences a much drier climate with only 149 mm (5.8 in) of rain over 12 days. For more detailed insights on October weather, you can check out Ishikawa weather in October.
September and November showcase notable differences in weather patterns. In September, temperatures are warmer, with averages around 28°C (82°F) and highs reaching up to 30°C (86°F), while November sees cooler temperatures, averaging 23°C (74°F) and maxing out at 26°C (80°F). Additionally, September experiences a much higher level of precipitation, totaling 237 mm (9.3 in) over 18 days, compared to November's 106 mm (4.2 in) across just 11 days. Humidity remains relatively high in both months, with September at 82% and November slightly lower at 79%. For more detailed insights, check out Ishikawa weather in November.
September and December present quite contrasting weather patterns. In September, temperatures are typically warmer, with a minimum of 24°C (75°F) and an average high of 30°C (86°F), accompanied by high humidity levels of 82%. The month experiences substantial rainfall, with 237 mm (9.3 in) falling over 18 days, contributing to a muggy atmosphere.
In contrast, December brings cooler and more comfortable weather, featuring a minimum temperature of 14°C (57°F) and a maximum of 25°C (78°F). Precipitation decreases to 162 mm (6.4 in) over 15 days, and humidity drops to 75%, resulting in drier conditions. For more specifics on December weather, you can visit Ishikawa weather in December.
As September unfolds in Ishikawa, the weather showcases a notable shift toward warmer temperatures and increased humidity compared to the preceding summer months. With an average range hovering around a comfortably warm 28°C, this transition is accompanied by significant rainfall, leading to nearly two-thirds of the month featuring precipitation. The average humidity level of 82% enhances the tropical feel, setting September apart as a month of lush greenery and vibrant landscapes. As you explore this beautiful region, don't forget to check out more on the local weather patterns by visiting Ishikawa Climate.