Last updated: August 21, 2025
September in Kushiro, Japan offers a mild transition into autumn, marked by a maximum temperature of 25°C (77°F) and an average of 17°C (62°F), creating a comfortable climate for outdoor activities. Visitors can expect cool evenings, with minimum temperatures dropping to 9°C (48°F), making a sweater a wise choice. This month sees an average precipitation of 105 mm (4.2 in) spread over 10 days, reflecting the region's lush, vibrant landscape. With a humidity level reaching 89%, the air feels pleasantly crisp, setting the perfect backdrop for exploring the natural beauty of Kushiro.
As September unfolds in Kushiro, Japan, the transition to autumn is palpable, marked by increasingly mild temperatures. The month greets visitors with a minimum temperature of 9°C (48°F) and an average of 17°C (62°F), reaching up to a pleasant 25°C (77°F) at its warmest. This warmth is a gentle decline from the summer's peak, providing a comfortable climate perfect for outdoor exploration before the chill of fall sets in. Notably, September's temperatures reflect a shift from the hotter months, offering a delightful balance that encourages both locals and tourists to enjoy the vibrant natural landscapes and potential wildlife sightings as the leaves begin their transformation.
In Kushiro, Japan, September marks a notable transition in the precipitation pattern, with an average rainfall of 105 mm (4.2 in) over 10 days of rain. This amount, while high, fits into a larger trend of increasing moisture that peaks during the summer months. Following the peak precipitation of 134 mm (5.3 in) in August, September maintains a substantial rainfall level, setting the stage for the heavier downpour often experienced in October. This continuity of rainfall not only contributes to the lush landscapes of the region but also highlights the seasonal shifts characteristic of Kushiro's climate, where late summer showers give way to autumn's heavier episodes. The overall trend indicates a gradual progression of rainfall from the relatively drier winter months through the wetter summer and fall seasons, emphasizing the dynamic weather patterns that define this unique locale.
In Kushiro, Japan, September marks a notable shift in humidity levels as the summer heat begins to wane. With an average humidity of 89%, the month shows a decline from the peak of 96% in August, yet still maintains a relatively high moisture level compared to the earlier months of the year. This slight decrease indicates a transition from the muggy summer months towards the drier conditions of autumn. Over the course of the year, humidity in Kushiro is consistently high, particularly during the summer, with a gradual descent as the colder months approach; January and February, for instance, see humidity levels around 84% and 83% respectively. Thus, while September retains a substantial humidity level, it hints at the impending shift towards the cooler, drier days ahead.
In September, Kushiro, Japan, experiences a UV Index of 8, indicating a very high exposure category that necessitates vigilance against sunburn, with a burn time of just 15 minutes. This reflects a trend seen throughout the summer months, where UV levels peak at their highest, particularly in July and August. Although September marks a slight decline from the summer's peak UV Index of 10, the levels remain elevated, emphasizing the importance of sun safety as the seasons begin to shift. As the year progresses into the cooler months, UV Index values tend to decrease, dropping to 5 by October. For more detailed information, visit Kushiro UV Index.
UV Risk Categories
As summer gracefully transitions into autumn, September in Kushiro, Japan continues to bask in a welcoming glow, accumulating 246 hours of sunshine. While this marks a slight decline from the vibrant summer months, it remains a delightful extension of the warmer season, reflecting a consistent trend of abundant sunlight that peaks in late spring. The steady increase from January to May is particularly striking, indicating a strong progression towards longer, sunnier days as the year unfolds. Despite September's retreat from the high-energy summer days of July and August, it still offers a pleasant ambiance, hinting at the crisp beauty of autumn that is just around the corner.
When it comes to sunny weather in September in Kushiro, Japan, the likelihood stands at about 35%, a moderate chance compared to the surrounding months. This follows a generally decreasing trend through the summer, where July and August see their lowest probabilities of sunny days, dropping to 14% and 27%, respectively. As autumn approaches, the outlook improves slightly, with September offering a hint of brightness before the weather becomes more variable in October, which returns to a 42% chance. Despite the fluctuating weather patterns, September still presents opportunities for clear skies, making it a transitional month worth experiencing in Kushiro.
As September arrives in Kushiro, Japan, daylight begins to wane, offering a gentle transition from the vibrant summer months into the crispness of fall. With 12 hours of daylight, September shows a slight decrease from the peak of 15 hours in June. This month marks a turning point; following the height of summer, the days gradually shorten, revealing a seasonal rhythm where longer days in spring and summer give way to the cozy embrace of autumn. The consistent drop in daylight hours continues into October and November, reflecting the retreat of sunlight as winter approaches. Despite this, September's still generous daylight lingers, inviting exploration of nature's changing hues and the beauty of the shifting seasons.
In Kushiro, Japan, September ushers in a mild shift in wind patterns, with an average speed of 3.6 m/s (8 mph)—a reflection of the transitional season as summer draws to a close. This gentle breeze contrasts with the stronger winds of early spring and late autumn, which can reach speeds of 5.6 m/s (13 mph) in February and 5.8 m/s (13 mph) in November. The summer months offer the calmest weather, notably in July, where the winds dip to 2.9 m/s (6 mph). However, as September arrives, the wind picks up slightly from the summer lull, hinting at the dynamic changes ahead. The gradual increase in wind speed toward October suggests a gearing up for the bolder gusts of autumn, making September a perfect time for those in Kushiro to enjoy the serene beauty of nature while feeling the remnants of summer's warmth in the air.
Weather in Kushiro varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kushiro, 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 9°C (48°F) to a warm 25°C (77°F), with an average of 17°C (62°F). This month experiences significant rainfall, totaling 105 mm (4.2 in) over approximately 10 days, coupled with high humidity at 89%. In contrast, January sees much colder temperatures, with a minimum of -14°C (7°F) and a maximum of just 7°C (45°F), averaging -4°C (26°F). Precipitation decreases to 44 mm (1.7 in) over about 6 days, and humidity is slightly lower at 84%. For further details on January weather, check out Kushiro weather in January.
September and February present stark contrasts in weather conditions. In September, temperatures range from a mild 9°C (48°F) at night to a pleasant 25°C (77°F) during the day, accompanied by significant rainfall totaling 105 mm (4.2 in) over approximately 10 days and high humidity at 89%. In contrast, February experiences much colder temperatures, with a chilling minimum of -18°C (-1°F) and an average of -4°C (25°F), peaking at just 6°C (43°F). Precipitation is also less frequent in February, with only 39 mm (1.5 in) over about 6 days and slightly lower humidity at 83%. For a detailed overview of February weather, you can visit Kushiro weather in February.
September and March present contrasting weather conditions. September experiences milder temperatures, with averages around 17°C (62°F) and maximums reaching 25°C (77°F), while March remains much colder, with an average of just 1°C (33°F) and maximums of only 11°C (53°F). Precipitation is fairly similar in both months, with September receiving 105 mm over 10 days and March having 90 mm over 9 days. Humidity is slightly higher in September at 89%, compared to March's 83%. The transition from the warmth of late summer in September to the chill of late winter in March highlights the distinct seasonal change in weather. For more details on March weather, you can check Kushiro weather in March.
September and April present distinct weather experiences, highlighting the transition between late summer and early spring. In September, the temperatures are noticeably warmer, with an average of 17°C (62°F) and a maximum of 25°C (77°F), compared to April's cooler conditions, where averages hover around 4°C (40°F) and max out at 16°C (61°F). September is also marked by higher humidity levels at 89%, while April has slightly lower humidity at 83%. Precipitation is more pronounced in September, with 105 mm (4.2 in) over approximately 10 days, whereas April sees about 73 mm (2.9 in) across roughly 9 days. For more detailed insights, you can check Kushiro weather in April.
September and May present distinct weather patterns, reflecting the transition between seasons. In September, temperatures range from a mild minimum of 9°C (48°F) to a comfortable maximum of 25°C (77°F), with an average of 17°C (62°F). This month experiences about 105 mm (4.2 in) of precipitation over approximately 10 days, coupled with high humidity at 89%. Conversely, May exhibits cooler temperatures, with a range from a low of 2°C (37°F) to a max of 23°C (74°F) and an average of 9°C (49°F). Precipitation in May is slightly lower at 93 mm (3.7 in) over 11 days, and humidity is also a bit reduced at 86%. For more detailed information on the weather in this month, you can refer to Kushiro weather in May.
September generally experiences warmer temperatures compared to June, with average highs reaching 25°C (77°F) as opposed to June's maximum of 20°C (69°F). The minimum temperatures in September are also higher, averaging 9°C (48°F) compared to June's 5°C (41°F). Although both months receive similar amounts of precipitation, September tends to be a bit wetter overall with 105 mm (4.2 in) compared to June's 92 mm (3.6 in). Additionally, the humidity in September is slightly higher at 89%, while June sits just below at 88%. For more detailed information on weather patterns in June, you can visit Kushiro weather in June.
In comparing the weather of September and July, both months experience similar temperature ranges, with maximums around 25°C (77°F). However, September averages a slightly higher daily temperature at 17°C (62°F) compared to July’s average of 16°C (61°F). While July sees a slightly lower precipitation level at 101 mm (4.0 in) over 9 days versus September's 105 mm (4.2 in) over 10 days, humidity levels are higher in September at 89%, compared to July's 93%. For more details on July weather, you can check Kushiro weather in July.
In comparing the weather of September to August, September tends to be slightly cooler, with average temperatures ranging from a minimum of 9°C (48°F) to a maximum of 25°C (77°F), while August boasts warmer conditions, with temperatures between 12°C (54°F) and 27°C (81°F). Moreover, September experiences a decrease in precipitation, totaling 105 mm (4.2 in) over approximately 10 days, compared to August's 134 mm (5.3 in) across 12 days. Humidity levels also drop in September to 89%, down from August's higher figure of 96%. For a more detailed look at the weather specifics in August, you can access this link: Kushiro weather in August.
In comparing the weather of September and October, we see a noticeable decline in temperature as October arrives. September boasts a mild average temperature of 17°C (62°F), with maximums reaching 25°C (77°F) and minimums at 9°C (48°F). In contrast, October brings cooler conditions, with an average of only 12°C (55°F) and a maximum of 21°C (70°F), along with minimum temperatures dropping to 3°C (38°F). Rainfall also increases in October, totaling 171 mm (6.7 in) over 12 days compared to September's 105 mm (4.2 in) over 10 days, although humidity slightly decreases from 89% to 83%. For more details on October weather, check out Kushiro weather in October.
September and November showcase distinctly different weather patterns. In September, temperatures are milder, with a minimum of 9°C (48°F) and a maximum of 25°C (77°F), averaging around 17°C (62°F). The month experiences considerable precipitation, with 105 mm (4.2 in) falling over 10 days, combined with high humidity at 89%. In stark contrast, November sees much cooler conditions, with temperatures plunging to a minimum of -5°C (23°F) and an average of just 7°C (44°F), peaking at 16°C (61°F). While November has less rainfall at 73 mm (2.9 in) over 8 days, humidity also drops to 80%. For more detailed insights, visit Kushiro weather in November.
September weather in Kushiro is characterized by milder temperatures, with lows around 9°C (48°F) and highs reaching up to 25°C (77°F), offering a pleasant average of 17°C (62°F). This month also sees significant rainfall, totaling 105 mm (4.2 in) over approximately 10 days, combined with high humidity at 89%. In contrast, December brings much colder conditions, with temperatures dropping to a minimum of -10°C (15°F) and a maximum of 13°C (55°F), averaging around 0°C (32°F). Precipitation decreases to 56 mm (2.2 in) over 7 days, and humidity also lowers to 79%. For more on December's climate, you can visit Kushiro weather in December.
As summer gently transitions into autumn, Kushiro's September weather brings a refreshing change characterized by milder temperatures and increased humidity. With average temperatures sitting around a comfortable 17°C, it's a perfect time to explore the natural beauty of the region. While the month does see some rainfall, totaling about 105 mm, these showers contribute to the lush scenery rather than dampen the spirit. The high humidity, prevalent throughout September, adds a slight heaviness to the air, reminding us of the waning warmth. Overall, this month sets the stage for the vivid fall colors that follow, making it a unique time to experience the charm of Kushiro. For more details, visit Kushiro Climate.