Last updated: August 21, 2025
In Ishikari, Japan, September marks a transition into autumn, showcasing a maximum temperature of 28°C (83°F) and a pleasant average of 19°C (66°F). As the month progresses, temperatures dip to a minimum of 10°C (49°F), offering a refreshing coolness. Despite enjoying mild weather, residents and visitors can expect 103 mm (4.0 in) of precipitation over 13 days, resulting in a humidity level of 88% that enhances the lush landscape. This blend of warm days and occasional rain creates a vibrant atmosphere, perfect for experiencing the natural beauty of Ishikari as it transitions into autumnal splendor.
In Ishikari, Japan, September marks a delightful transition from summer to autumn, with temperatures beginning to cool from the warmer months. The average temperature settles at a comfortable 19°C (66°F), while daytime highs can reach a pleasant 28°C (83°F), providing plenty of warmth for outdoor activities. As the month progresses, nights become crisper, with minimum temperatures dropping to around 10°C (49°F). This shift sets a tranquil atmosphere, perfect for enjoying the vibrant fall foliage that starts to appear, making September an ideal time to experience the changing seasons in this charming region.
In Ishikari, Japan, September brings a notable shift in precipitation patterns, with an average of 103 mm (4.0 in) of rain spread over 13 days. This marks a continuation of the substantial rainfall seen in August, which peaks at 182 mm (7.2 in). Following the summer months, where the precipitation steadily increases, September maintains a high level of rainfall, reflecting the region's transition into the wetter autumn season. Notably, this September precipitation aligns closely with June and July's totals, indicating a persistent wet trend as the year progresses towards autumn. As local landscapes prepare for the cooler months, the consistent rainfall reinforces Ishikari’s lush, green scenery, a hallmark of the region’s dynamic climate.
September in Ishikari, Japan, marks a transition as summer's peak humidity begins to wane, settling at a still-significant 88%. This dip follows the sweltering highs of 95% in August and a continuous rise through the summer months. While September retains a sense of mugginess, it heralds the approach of autumn, where the humidity further decreases in the subsequent months, eventually reaching 83% in October. Interestingly, throughout the year, Ishikari exhibits a pattern of fluctuating humidity, with winter months hovering in the 79-84% range, reflecting a cooler and dryer climate. Overall, September serves as a pivotal month, balancing the lingering warmth of summer with the promise of autumn’s crispness.
As September rolls around in Ishikari, Japan, the UV Index reflects a notable trend toward a high level of UV exposure, maintaining an index of 8 categorized as very high. This indicates a continued risk from the sun, especially following the peak of summer, which experienced consistent UV Index values of 9 and 10 in the preceding months. With a burn time of just 15 minutes, it's essential for residents and visitors alike to remain vigilant about sun protection. As temperatures begin to cool with the arrival of autumn, the UV levels still demand caution, making it a crucial time to protect your skin. For detailed UV readings throughout the year, you can check Ishikari UV Index.
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September in Ishikari, Japan, is a delightful transition into autumn, offering 269 hours of sunshine. This month continues the summer's generous glow, following the peak radiance of 321 hours in July. As the days shorten, September still retains a vibrant warmth, serving as a reminder of the sunny days of summer. The sunshine begins to wane into October, which sees a drop to 234 hours, but September holds its own, still brighter than the earlier months of the year, particularly in comparison to the 133 hours of January. This trend showcases Ishikari's gradual shift in seasons, making September a perfect time to savor the lingering sunshine before the cooler months settle in.
In Ishikari, Japan, September enjoys a 43% chance of sunny weather, marking a notable improvement from the summer months. The likelihood of sunshine in September is slightly higher than the previous month’s 35%, indicative of a gradual transition into autumn. This month stands out as one of the more favorable periods for clear skies, especially when compared to the earlier winter and spring months, which average below 42%. With a modest yet significant probability of sunshine, September invites residents and visitors alike to embrace the beauty of early fall, making it an ideal time for outdoor activities.
As summer gradually gives way to autumn in Ishikari, Japan, September marks a gentle transition in daylight duration, with the sun gracing the skies for 12 hours each day. This is a slight dip from the vibrant peak of 15 hours in June, reflecting a subtle shift in the rhythm of daily life. October further continues this trend, reducing daylight to 11 hours, signaling the approach of winter. Notably, the gradual decrease from the lush summer months captures the essence of seasonal change, where each hour of daylight becomes a cherished moment as the days slowly shorten. This beautiful balance of light and shadow encapsulates the charm of Ishikari's fall season, inviting residents and visitors alike to savor the lingering warmth of September's sun.
In Ishikari, Japan, the winds shift with the seasons, painting a dynamic picture of the region's atmosphere. September ushers in a gentle breeze, with an average wind speed of 3.7 m/s (8 mph), marking a slight uptick from the sultry summer months of July and August. As the year progresses, the wind speeds gradually increase, culminating in November's robust 5.0 m/s (11 mph), indicative of the approaching colder months. Meanwhile, early winter in December sees a return to stronger gusts, reaching 5.1 m/s (12 mph). The overall trend showcases a gradual increase in wind strength from summer into late autumn, hinting at the approaching chill of winter that will soon envelop Ishikari. With each passing month, the dance of the wind reflects the shifting seasonal rhythms, creating an alluring narrative of nature's changes.
Weather in Ishikari varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Ishikari, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present starkly contrasting weather conditions. In September, temperatures range from a mild 10°C (49°F) at night to a pleasant average of 19°C (66°F) during the day, peaking at a warm 28°C (83°F). The month experiences significant rainfall, with 103 mm (4.0 in) falling over 13 days, and humidity levels rising to a sultry 88%. In contrast, January is characterized by cold temperatures, plunging as low as -13°C (8°F) at night, with an average of -3°C (26°F) and a maximum of 6°C (42°F). While January sees less precipitation, totaling 74 mm (2.9 in) over 19 days, the humidity remains relatively high at 84%. For a more detailed look at January weather, check out Ishikari weather in January.
In September, the weather is notably warmer with average temperatures ranging from a minimum of 10°C (49°F) to a maximum of 28°C (83°F), while February offers a stark contrast with much colder averages that can drop to a minimum of -12°C (11°F) and peak at just 5°C (42°F). Additionally, September experiences more intense rainfall, totaling 103 mm (4.0 in) over 13 days, compared to February, which sees lower precipitation levels at 84 mm (3.3 in) but over a longer stretch of 21 days. Humidity levels are similar in both months, with September at 88% and February slightly lower at 83%. For a deeper look at February's weather specifics, visit Ishikari weather in February.
In September, the weather is notably warmer, with average temperatures hovering around 19°C (66°F) and a maximum of 28°C (83°F), making it a pleasant time for outdoor activities. The month experiences significant rainfall, with 103 mm (4.0 in) over 13 days, contributing to a high humidity level of 88%. In contrast, March brings a much cooler climate, characterized by an average temperature of just 1°C (35°F) and occasional drops to -8°C (18°F). Although it sees slightly less precipitation, totaling 80 mm (3.2 in) over 14 days, the humidity remains relatively high at 81%. For more details on March weather, you can check Ishikari weather in March.
September and April present distinct weather contrasts. In September, temperatures range from a comfortable minimum of 10°C (49°F) to a warm maximum of 28°C (83°F), with an average of 19°C (66°F). The month experiences considerable rainfall, totaling 103 mm (4.0 in) across 13 days, coupled with high humidity at 88%. In stark contrast, April features much cooler temperatures, with a minimum dipping to -2°C (28°F) and a maximum reaching 20°C (68°F), resulting in an average temperature of just 6°C (43°F). Precipitation is lower in April, accumulating to 73 mm (2.9 in) over 11 days, and the humidity is also slightly lower at 81%. For more detailed insights on the weather in April, you can check Ishikari weather in April.
In September, temperatures are generally warmer, with a minimum of 10°C (49°F) and an average of 19°C (66°F), peaking at 28°C (83°F), while May experiences cooler temperatures, ranging from a minimum of 4°C (40°F) to an average of 12°C (54°F) and a maximum of 27°C (81°F). Precipitation levels are slightly higher in September, at 103 mm (4.0 in) over 13 days, compared to May's 89 mm (3.5 in) across 12 days. Both months have high humidity, with September at 88% and May at 86%. For more specific weather details in May, you can check Ishikari weather in May.
In comparing the weather of September and June, we see that September tends to be warmer, with average temperatures reaching 19°C (66°F) compared to June's 16°C (61°F). While both months experience similar precipitation levels, with September receiving 103 mm (4.0 in) over 13 days and June recording 103 mm (4.1 in) over just 10 days, September's higher maximum temperature of 28°C (83°F) contrasts with June's peak of 24°C (76°F). Humidity levels are quite similar, with September at 88% and June slightly lower at 87%. For more detailed information on June weather, you can check out Ishikari weather in June.
When comparing the weather in September to that of July, notable differences and similarities emerge. September sees slightly cooler temperatures, with an average of 19°C (66°F) compared to July's warmer 21°C (69°F). The maximum temperature in September reaches 28°C (83°F), while July peaks at 30°C (86°F). Both months experience similar levels of precipitation, with September receiving 103 mm (4.0 in) over 13 days and July totaling 104 mm (4.1 in) over 11 days. Humidity remains high in both months, though September's 88% is a touch lower than July’s 93%. For a closer look at specific conditions during July, you can check Ishikari weather in July.
In comparing the weather between September and August, September presents cooler temperatures with a minimum of 10°C (49°F), an average of 19°C (66°F), and a maximum of 28°C (83°F). In contrast, August is warmer, featuring a minimum of 15°C (59°F), an average of 22°C (71°F), and a maximum of 30°C (86°F). Precipitation is notably higher in August, with 182 mm (7.2 in) compared to September's 103 mm (4.0 in), although both months experience rain on approximately 13 days. Moreover, humidity levels in August peak at 95%, while September's humidity decreases slightly to 88%. For more details on August weather in Ishikari, check out Ishikari weather in August.
September and October present a noticeable shift in weather characteristics. In September, temperatures range from a minimum of 10°C (49°F) to a maximum of 28°C (83°F), with an average of 19°C (66°F). The month sees 103 mm (4.0 in) of precipitation spread across 13 days, alongside relatively high humidity at 88%. In contrast, October experiences cooler temperatures, with a minimum of 4°C (40°F) and an average of 13°C (56°F), peaking at 24°C (75°F). Precipitation increases to 129 mm (5.1 in) over 16 days, while humidity slightly decreases to 83%. This transition marks a shift to more autumn-like conditions. For a detailed look at the weather in October, check out Ishikari weather in October.
The weather in September is characterized by milder temperatures ranging from a minimum of 10°C (49°F) to a maximum of 28°C (83°F), with an average of 19°C (66°F). During this month, the region experiences considerable rainfall, with 103 mm (4.0 in) spread over 13 days, and high humidity at 88%. In contrast, November sees a significant drop in temperatures, with minimums plummeting to -3°C (26°F) and an average of just 6°C (44°F), although maximums can still reach 17°C (63°F). This month also brings increased precipitation of 153 mm (6.0 in) over 22 days, and humidity decreases to 79%. For a closer look at November weather, check out Ishikari weather in November.
In September, the weather is notably warmer, with temperatures ranging from a minimum of 10°C (49°F) to a maximum of 28°C (83°F) and an average of 19°C (66°F). The month experiences significant rainfall, with 103 mm (4.0 in) spread over 13 days, and the humidity often feels quite high at 88%. In contrast, December ushers in a much colder climate, with temperatures dipping to a minimum of -11°C (13°F) and peaking at 13°C (56°F), averaging around -1°C (31°F). The precipitation increases slightly to 123 mm (4.8 in) but is spread over a longer span of 27 days, while humidity remains relatively lower at 80%. For more detailed information, check out Ishikari weather in December.
As September rolls into Ishikari, the weather experiences a noticeable shift from the warmth of summer to the crispness of autumn. Daytime temperatures average a comfortable 19°C (66°F), offering a refreshing respite as the peak heat wanes. With about 103 mm of precipitation spread across 13 days, sporadic showers become a hallmark of the month, adding a layer of humidity that lingers in the air, often reaching 88%. Compared to the dry and warmer days of the previous months, September serves as a bridge into the cooler seasons, inviting residents and visitors alike to enjoy the vibrant change in nature. For a deeper dive into how these trends shape Ishikari's climate, visit Ishikari Climate.