Last updated: August 21, 2025
In September, Chitose, Japan experiences a delightful transition into autumn, with average temperatures hovering around 18°C (65°F). Daytime highs can reach a pleasant 27°C (80°F), while cooler nights dip to a minimum of 8°C (47°F). The month sees moderate rainfall, yielding approximately 103 mm (4.0 in) over about 13 days, contributing to a humid atmosphere at 88%. This blend of warmth and moisture makes for a refreshing and vibrant early autumn experience in this picturesque region.
As September rolls in, Chitose, Japan experiences a delightful transition into autumn, with temperatures reflecting a comfortable balance between the remnants of summer warmth and the crispness of fall. The minimum temperatures rise to a pleasant 8°C (47°F), while average highs reach a lovely 27°C (80°F), offering ideal conditions for outdoor activities. The average temperature sits at a cozy 18°C (65°F), creating the perfect backdrop for enjoying the vibrant autumn foliage. The gradual decline from the sweltering heat of summer is evident, marking a subtle shift as the month progresses, but the lingering warmth allows residents to savor the beauty of early autumn before the chill of winter arrives.
In September, Chitose, Japan, experiences a notable shift as the summer warmth gives way to the crispness of autumn, reflected in its precipitation pattern. With 103 mm (4.0 in) of rain over 13 days, September stands out as a month with higher rainfall than several preceding summer months, indicating a transition to wetter conditions. This increase ties closely to August's significant rainfall of 168 mm (6.6 in), suggesting that the lingering effects of summer storms often extend into early fall. However, as September closes, Chitose braces for October, typically one of the rainier months of the year, where the overall trend of increased precipitation continues. This seamless blend of wet summer remnants and the onset of autumn sets the stage for a vibrant landscape, enriched by the season's changing colors and cooler temperatures.
September in Chitose, Japan, reveals a noteworthy transition in humidity levels as summer winds down. With an average humidity of 88%, September marks a slight decline from the peak summer months of July and August, which boast humidity levels of 93% and 95% respectively. This decrease signifies a shift towards the more temperate conditions of autumn, yet it still retains a significant level of moisture in the air. Interestingly, the humidity remains higher than the spring months, where levels hovered around 81%, suggesting that while the sweltering heat eases, the lingering humidity continues to define Chitose's climatic identity. As October approaches, the trend indicates a further drop, mirroring the crispness of approaching fall days.
As we transition into September in Chitose, Japan, the UV Index remains a notable 8, indicating a very high exposure category that mirrors the intense sun experienced in the preceding summer months. With a burn time of just 15 minutes, this month invites residents and visitors alike to stay vigilant about sun protection. This slight dip from the peak 10 seen in August signals the tail end of the sun's most potent period, yet the UV rays are still strong enough to warrant caution. Observing this trend, it’s clear that while September offers a reprieve compared to the height of summer, UV safety should remain a top priority. For more detailed information, check out Chitose UV Index.
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September in Chitose, Japan, brings a delightful blend of warmth and light with 266 hours of sunshine, making it one of the more luminous months as summer transitions into autumn. Following the peak of 311 hours in July, sunlight begins to taper off, yet September still enjoys a robust supply of golden rays, hinting at the lingering warmth of summer. This gradual decline in sunlight hours is typical as the region shifts toward the cooler months, with October offering 232 hours of sunshine. Overall, the trend highlights a gradual yet noticeable descent from the sun-drenched days of summer, inviting residents and visitors alike to savor the last remnants of the sunny season before the crispness of fall sets in.
In Chitose, Japan, September enjoys a relatively favorable likelihood of sunny weather, with a 40% chance of sunshine. This figure aligns closely with the sunnier months at the start of the year, such as January and March, both of which also hover around 40%. While the summer months of June and July see a dip in sunshine, September offers a refreshing transition to autumn, allowing for pleasant weather that is ideal for outdoor activities. Interestingly, the trend shows that as the seasons change, the chances of sunny days remain steady, standing in stark contrast to the significantly lower percentages seen in the peak of summer.
As September rolls in Chitose, Japan, daylight begins to gently wane, offering approximately 12 hours of sunlight—a notable decrease from the summer peak of 15 hours in June. This gradual decline reflects the transition into autumn, following the vibrant days of July and August. The trend reveals a steady increase in daylight from the depths of winter, where January and February barely reach 9 to 10 hours, leading up to the lush, longer days of spring and summer. Following September, the hours of sunlight continue to shrink, mirroring nature's preparation for the colder months ahead, ultimately culminating in a return to the shorter days of late fall and winter.
As summer gives way to autumn, September in Chitose, Japan, greets residents with a refreshing breeze, featuring an average wind speed of 3.9 m/s (9 mph). This slight uptick from the summer months reflects a transition, gently whisking away the warmth of August's 3.4 m/s (8 mph) winds. Interestingly, as the year progresses into the colder months, wind speeds tend to stabilize; October sees a modest dip to 3.7 m/s (8 mph) before rising again in November to 4.4 m/s (10 mph), suggesting a dynamic interplay between seasonal shifts. Thus, September stands as a gentle harbinger of change, inviting a fresh energy that hints at the brisk chill of winter ahead.
Weather in Chitose varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Chitose, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January showcase starkly contrasting weather conditions. In September, temperatures range from a mild 8°C (47°F) at night to a warm 27°C (80°F) during the day, with an average temperature of 18°C (65°F). This month also experiences significant precipitation, with 103 mm (4.0 in) over 13 days and a high humidity level of 88%. Conversely, January brings a chillier climate, with temperatures plunging to a minimum of -15°C (6°F) and peaking at 8°C (47°F), averaging -3°C (26°F). Precipitation drops to 39 mm (1.5 in) over just 8 days, and humidity decreases slightly to 84%. For more details about January weather, you can refer to Chitose weather in January.
In comparing the weather of September and February, there is a stark contrast in temperature and precipitation levels. In September, temperatures range from a mild minimum of 8°C (47°F) to a comfortable average of 18°C (65°F), peaking at a warm 27°C (80°F). The month experiences considerable rainfall, with 103 mm (4.0 in) over 13 days, contributing to a high humidity level of 88%.
In contrast, February presents a much colder scenario, with temperatures plunging to a low of -15°C (6°F), an average of -3°C (27°F), and a maximum of just 6°C (44°F). The precipitation decreases significantly to 47 mm (1.8 in) spread over 8 days, accompanied by a slightly lower humidity level of 83%. For more detailed insights on February weather, you can check Chitose weather in February.
September and March present contrasting weather experiences. In September, temperatures typically range from a minimum of 8°C (47°F) to a maximum of 27°C (80°F), with an average temperature of 18°C (65°F). The month sees considerable humidity at 88% and approximately 103 mm (4.0 in) of precipitation over 13 days. In contrast, March is still quite chilly, with temperatures ranging from a minimum of -11°C (13°F) to a maximum of 13°C (55°F), averaging only 2°C (36°F). Although March has less precipitation at 76 mm (3.0 in) over 9 days, the humidity is slightly lower at 81%. For those looking to learn more about conditions during March, you can check out Chitose weather in March.
September and April present distinctly different weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a pleasant average of 18°C (65°F), peaking at 27°C (80°F). This month also sees relatively high humidity levels at 88% and approximately 103 mm (4.0 in) of rainfall spread over 13 days. In contrast, April experiences much cooler temperatures, with a minimum of -2°C (29°F) and an average of 6°C (44°F), reaching a maximum of just 17°C (62°F). Although April has slightly less rainfall at 80 mm (3.1 in) over 11 days, it has lower humidity at 81%. For more detailed insights into April weather, you can check Chitose weather in April.
In a comparison of September and May weather, September tends to be warmer with an average temperature of 18°C (65°F), while May averages cooler at 11°C (52°F). The maximum temperatures in September reach up to 27°C (80°F), significantly higher than May's peak of 22°C (73°F). Additionally, September experiences more rainfall, with 103 mm (4.0 in) over 13 days, compared to May's 83 mm (3.3 in) over 10 days. Humidity levels are slightly higher in September at 88% compared to May’s 86%. For more detailed information about May weather, visit Chitose weather in May.
September and June offer distinct weather experiences. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 27°C (80°F), with an average of 18°C (65°F). The month sees around 103 mm (4.0 in) of precipitation spread over 13 days, contributing to a humidity level of 88%. In contrast, June features slightly cooler temperatures, with a minimum of 7°C (45°F), an average of 15°C (59°F), and a maximum of 24°C (75°F). Rainfall in June is comparable at 106 mm (4.2 in) but occurs over fewer days, totaling just 10. The humidity is slightly lower at 87%. Overall, September tends to be warmer and wetter than June. For more details on June weather, you can check Chitose weather in June.
In comparing September and July weather, we see some notable differences. September features a range of temperatures from a minimum of 8°C (47°F) to a maximum of 27°C (80°F), while July is slightly warmer, with temperatures ranging from 11°C (52°F) to 30°C (86°F). Both months experience similar rainfall, with September receiving 103 mm (4.0 in) and July just a touch less at 95 mm (3.7 in), each having precipitation on about 13 days. However, September's humidity is slightly lower at 88% compared to July's 93%, contributing to a more comfortable feel in the early fall compared to the peak summer month. For more details on July weather, visit Chitose weather in July.
In comparing the weather of September and August, September tends to bring cooler temperatures, with a minimum of 8°C (47°F) and an average of 18°C (65°F), compared to August's more moderate minimum of 13°C (55°F) and average of 21°C (70°F). The maximum temperatures in September reach up to 27°C (80°F), slightly lower than August's peak of 29°C (84°F). Precipitation is notably lighter in September, totaling 103 mm (4.0 in) over 13 days, whereas August experiences more rainfall with 168 mm (6.6 in), also over 13 days. Additionally, humidity remains high in both months, but is slightly lower in September at 88% than in August's 95%. For a detailed look at August weather, you can check Chitose weather in August.
September typically experiences milder temperatures, with minimums around 8°C (47°F) and average highs reaching 27°C (80°F). In contrast, October sees a noticeable drop in temperatures, with minimums dropping to 3°C (37°F) and average highs declining to 24°C (75°F). Although both months receive significant precipitation, October records slightly more at 124 mm (4.9 in) over 11 days, compared to September's 103 mm (4.0 in) over 13 days. Humidity levels are also lower in October, at 83%, compared to September's 88%. For more detailed information, you can visit Chitose weather in October.
In September, the weather is generally mild with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 27°C (80°F), averaging around 18°C (65°F). This month experiences considerable humidity at 88%, along with 103 mm (4.0 in) of precipitation spread over 13 days. In contrast, November sees a notable drop in temperatures, with a minimum of -5°C (23°F) and an average of 7°C (44°F), peaking at 17°C (63°F). Precipitation slightly decreases to 88 mm (3.5 in) over 10 days, and humidity lowers to 79%. For more detailed insights on November weather, you can visit Chitose weather in November.
September and December present contrasting weather conditions. In September, temperatures are relatively mild, with an average of 18°C (65°F) and highs reaching 27°C (80°F), accompanied by significant precipitation of 103 mm (4.0 in) over 13 days, resulting in high humidity levels of 88%. In stark contrast, December brings much colder conditions, with an average temperature of 0°C (32°F) and maximums peaking at 14°C (57°F). Precipitation decreases to 60 mm (2.4 in) over the same number of days, while humidity drops to 80%. For more details on December weather, visit Chitose weather in December.
As September unfolds in Chitose, the weather begins to transition gracefully from the summer's warmth into the crispness of autumn. Characterized by a noticeable drop in temperatures, the month presents an average of 18°C, which is notably cooler compared to the peak of summer. While occasional warm days can still be savored, the increased precipitation and humidity—along with a higher likelihood of rain—clearly distinguish September from the drier summer months. The lush landscape thrums with vitality, setting the stage for autumn's vibrant hues. For a deeper understanding of weather patterns throughout the year, visit Chitose Climate.