Last updated: August 21, 2025
In Kawasaki, Japan, the weather in September showcases a striking contrast, with temperatures ranging from a warm maximum of 33°C (92°F) to a cool minimum of 8°C (47°F), averaging around 21°C (69°F). This month experiences significant precipitation, totaling 150 mm (5.9 in) over 14 days, making it one of the wetter times of the year. The humidity levels hover at a high 86%, creating a tropical feel that underscores the city's transition into autumn. Prepare for a blend of warm days and refreshing rain, characteristic of Kawasaki's vibrant September climate.
In September, Kawasaki, Japan, experiences a delightful transition towards autumn, with temperatures showcasing a gradual cool-down from the intense summer heat. The month begins with a pleasant minimum of 8°C (47°F), allowing for crisp mornings, while the average climbs to a comfortable 21°C (69°F). Daytime highs can reach up to 33°C (92°F), providing a lingering warmth reminiscent of summer but offset by the cooler evenings. This month stands out as a bridge, where the humidity from previous months starts to dissipate, offering a refreshing respite characterized by vibrant foliage and clearer skies—perfect for outdoor activities and enjoying the scenic beauty of Kawasaki.
In September, Kawasaki experiences a notable transition in its weather patterns, marked by 150 mm (5.9 in) of precipitation over approximately 14 days of rain. This month sits comfortably between the summer's deluge, with July and August seeing significantly higher totals, and the drier months that follow in October and November. The rainfall in September is crucial as it helps to recharge the environment after the intense summer heat, supporting the lush greenery that marks the city's landscape. While the precipitation is substantial, it remains manageable, paving the way for a refreshing shift towards autumn and hinting at the seasonal changes to come.
In September, Kawasaki experiences a noticeable drop in humidity compared to the peak summer months, settling at a comfortable 86%. This represents a slight decrease from the 92% levels seen in both July and August, marking the transition from the sweltering heat of summer to the more temperate conditions of autumn. Throughout the year, Kawasaki's humidity levels generally fluctuate, with the highest averages recorded during the summer months of June through August, often hovering above 87%. As October approaches, humidity further declines to 82%, signaling the gradual shift towards drier air, which continues through the fall. This trend highlights Kawasaki's humid subtropical climate, characterized by hot summers and mild winters, creating a distinct seasonal rhythm in its atmospheric conditions.
In September, Kawasaki, Japan experiences a very high UV Index of 9, with a burn time of just 15 minutes. As summer transitions into autumn, the UV levels begin to slightly decline from the extreme highs seen in July and August, where the index peaked at 11. This shift marks a notable trend as the days grow shorter, yet the need for sun protection remains critical. The UV exposure remains significant, emphasizing the importance of taking precautions outdoors. For a detailed look at the UV Index throughout the year, visit Kawasaki UV Index.
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As the summer warmth transitions into autumn, September in Kawasaki, Japan embraces a delightful balance of sunshine and cooler breezes, boasting 247 hours of bright daylight. This month marks a slight dip from the sun-drenched days of August, which recorded 271 hours, but it still outshines the earlier months of the year. The trend shows a gradual increase in sunlight from the cold grip of January's mere 167 hours, peaking in May with an impressive 292 hours of sunshine. As the year progresses, the hours begin to taper off; however, September retains a healthy amount of daylight, signaling the lingering warmth of summer before yielding to the gentle hues of autumn.
In Kawasaki, Japan, the likelihood of sunny weather in September sits at around 29%, reflecting a slight dip in sunshine compared to the summer months. This moderate probability indicates that while clear skies are not guaranteed, there's still a fair chance of enjoying a few bright days amidst the transitioning season. Following the sizzling summer, September's weather tends to be less predictable, yet it remains more favorable for sunshine than the typically cloudy months that follow in October and November. As autumn approaches, residents and visitors alike can relish those occasional sunlit moments, making September a delightful time to experience the changing foliage alongside bursts of sunshine.
In Kawasaki, Japan, the rhythm of daylight shifts throughout the year, revealing an intriguing seasonal pattern. As summer peaks in June and July, the city basks in a generous 14 hours of daylight, creating long, sun-kissed days perfect for outdoor activities. However, as autumn approaches, notably in September, daylight begins to wane, dropping to 12 hours. This gradual decline signals the transition towards shorter days, as the daylight dips further to 11 hours in October and down to 10 hours by November. The year starts and ends with a modest 9 hours of daylight in both January and December, framing a cyclical dance of light that adapts beautifully with the changing seasons.
As the summer heat gives way to the gentle embrace of autumn, September in Kawasaki features a moderate wind speed averaging 2.3 m/s (5 mph). This slight uptick from the previous months reflects a shift in the seasonal breeze, reminiscent of nature’s transitional whisper. While July and August experienced their calmest winds at 1.9 m/s and 2.2 m/s, respectively, September's breezy ambiance hints at the refreshing changes ahead. This trend continues into October, where winds pick up slightly, suggesting that the autumn progression will gradually invigorate the air in this vibrant Japanese city.
Weather in Kawasaki varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kawasaki, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January exhibit starkly contrasting weather patterns. In September, temperatures range from a minimum of 8°C (47°F) to a maximum of 33°C (92°F), with an average of 21°C (69°F), accompanied by high humidity at 86% and significant rainfall of 150 mm (5.9 in) over 14 days. In contrast, January presents a much colder climate, where temperatures dip to a minimum of -10°C (14°F) and only reach a maximum of 11°C (52°F), averaging around 0°C (33°F). Precipitation is lower in January at 65 mm (2.6 in) across 13 days, with humidity around 80%. For more detailed insights, you can check the Kawasaki weather in January.
September and February present strikingly different weather patterns. In September, temperatures range from a mild 8°C (47°F) to a warm 33°C (92°F), with an average of 21°C (69°F). This month is characterized by high humidity at 86% and significant rainfall, totaling 150 mm (5.9 in) over approximately 14 days. In contrast, February experiences much cooler conditions, with temperatures dropping to a minimum of -10°C (14°F) and averaging just 1°C (35°F), peaking at 15°C (59°F). Precipitation is lighter in February, totaling only 53 mm (2.1 in) across 12 days, and humidity stands at 79%. For more detailed insights about February weather, visit Kawasaki weather in February.
September and March present contrasting weather profiles, highlighting the transition between late summer and early spring. In September, temperatures range from a mild 8°C (47°F) to a warm 33°C (92°F), with an average of 21°C (69°F). The month also sees substantial rainfall, with 150 mm (5.9 in) over 14 days, and high humidity at 86%. In contrast, March is notably cooler, with temperatures fluctuating from a chilly -3°C (26°F) to a mild 20°C (69°F) and an average of only 5°C (42°F). While precipitation is slightly less at 112 mm (4.4 in) over 13 days, the humidity is lower at 77%. These differences illustrate the distinct seasonal changes experienced during these months. For more detailed information, you can check Kawasaki weather in March.
September and April show distinct differences in weather patterns. September boasts a warmer climate, with average temperatures around 21°C (69°F) and highs reaching up to 33°C (92°F), making it feel notably hotter. In contrast, April experiences a cooler average temperature of 10°C (50°F), with nighttime lows occasionally dropping to -2°C (29°F). While September has higher humidity at 86% and significantly more precipitation (150 mm over 14 days), April remains relatively drier with 109 mm of rain over 12 days. For a closer look at what to expect during April, you can visit Kawasaki weather in April.
September and May present contrasting weather patterns. September features a broader temperature range, with minimums reaching 8°C (47°F) and maximums soaring up to 33°C (92°F), averaging around 21°C (69°F). In contrast, May has cooler temperatures, with minimums of 4°C (40°F) and maximums of 30°C (87°F), averaging 16°C (61°F). While September experiences higher precipitation at 150 mm (5.9 in) over 14 days and a humidity level of 86%, May is relatively drier with 107 mm (4.2 in) of rain over 13 days and 80% humidity. For more specific insights into weather during this month, you can check Kawasaki weather in May.
When comparing the weather in September and June, notable differences emerge. September experiences a wider temperature range, with a minimum of 8°C (47°F) and a maximum reaching up to 33°C (92°F), while June has a slightly higher minimum of 10°C (49°F) and a maximum of 32°C (89°F). The average temperature in September (21°C or 69°F) surpasses that of June (19°C or 67°F). Precipitation levels are also higher in September, with 150 mm (5.9 in) of rain over 14 days compared to June's 101 mm (4.0 in) across 13 days. Humidity remains quite similar, with September at 86% and June slightly higher at 87%. For more insights, you can check Kawasaki weather in June.
When comparing the weather in September and July, we see distinct contrasts. September experiences slightly cooler temperatures, with a minimum of 8°C (47°F) and a maximum of 33°C (92°F), while July boasts warmer conditions, with a minimum of 15°C (60°F) and a maximum of 35°C (95°F). Additionally, July has higher precipitation, totaling 232 mm (9.1 in) over 18 days, compared to September's 150 mm (5.9 in) over 14 days. Humidity levels also remain elevated in both months, with July at 92% and September at 86%. For more specifics on July weather, visit Kawasaki weather in July.
In comparing the weather of September and August, September tends to be cooler, with a minimum temperature of 8°C (47°F) compared to August's 14°C (58°F). While the average temperature in September is 21°C (69°F), August offers a warmer average of 25°C (77°F), and the maximum temperatures reflect this difference as well, hitting 33°C (92°F) in September versus 35°C (95°F) in August. Additionally, September experiences more rainfall, with 150 mm (5.9 in) over 14 days, while August has higher precipitation of 214 mm (8.4 in) across 20 days. Finally, humidity levels are slightly lower in September at 86%, compared to August's higher 92%. For more details on August weather, you can visit Kawasaki weather in August.
September tends to be warmer than October, with average temperatures ranging from a minimum of 8°C (47°F) to a maximum of 33°C (92°F), while October sees cooler averages of 4°C (39°F) to 27°C (81°F). Alongside the temperature drop, October experiences an increase in precipitation, totaling 208 mm (8.2 in) over 12 days, compared to September's 150 mm (5.9 in) across 14 days. Humidity levels in September are slightly higher at 86%, while October's humidity rests at 82%. For more detailed weather conditions in October, you can refer to this link: Kawasaki weather in October.
September and November present a striking contrast in weather patterns. September boasts a range of temperatures from a pleasant 8°C (47°F) to a warm 33°C (92°F), making it the last surge of summer temperatures with an average of 21°C (69°F). However, it comes with significant rainfall, totaling 150 mm (5.9 in) over 14 days and high humidity at 86%. In contrast, November ushers in a much cooler climate, with temperatures dipping to a minimum of -3°C (27°F) and averaging around 9°C (48°F), with a maximum of 21°C (69°F). Precipitation is considerably lower at 40 mm (1.6 in) over just 9 days, accompanied by a drop in humidity to 79%. For more details on the specific weather in November, you can visit Kawasaki weather in November.
In September, the weather is significantly warmer, with average temperatures reaching 21°C (69°F), peaking at a high of 33°C (92°F), while nighttime temperatures can drop to a mild 8°C (47°F). The month sees considerable rainfall, totaling 150 mm (5.9 in), and humidity levels are high at 86%, with precipitation occurring on 14 days. In contrast, December experiences much cooler temperatures, with an average of only 3°C (37°F) and maximums up to 16°C (61°F), while nighttime lows can dip to -5°C (23°F). Although December has fewer total rainfall at 67 mm (2.6 in), it still shares a notable number of rainy days at 16, with slightly lower humidity at 80%. For more detailed insights, visit Kawasaki weather in December.
As September unfolds in Kawasaki, the weather signals a transition from the warmth of summer to the cooler embrace of autumn. With average temperatures hovering around 21°C, this month offers a pleasant reprieve, but not without its challenges—high humidity levels reaching 86% contribute to a feeling of stuffiness, while rainfall is more frequent, with precipitation spread over 14 days. Compared to the blazing heat of the preceding months, the milder temperatures and increased moisture invite a refreshing change, encouraging outdoor exploration amidst the changing foliage. Experience the unique nuances of September's climate by visiting Kawasaki Climate.