Last updated: August 21, 2025
September in Amakusa, Japan is characterized by warm temperatures and high humidity, making it a vibrant yet humid month. With maximum daily highs reaching 35°C (95°F) and an average temperature of 26°C (79°F), the climate invites both outdoor exploration and a need for hydration. Visitors can expect a cooler respite at night, with temperatures dipping to a minimum of 17°C (62°F). However, preparations for rain are essential, as this month records an impressive 227 mm (8.9 in) of precipitation over 15 days. The high humidity, averaging around 84%, adds a tropical feel to the already picturesque surroundings, making September a unique time to experience Amakusa's natural beauty.
In September, Amakusa experiences a delightful transition as summer begins to wane. With minimum temperatures around 17°C (62°F) and average highs climbing to 35°C (95°F), the month strikes a balance between warmth and the onset of cooler autumn vibes. As days grow shorter, the average temperature settles at a pleasant 26°C (79°F), offering ideal conditions for outdoor activities and exploration. This month marks a significant drop from the sizzling highs of August, which often boast scorching temperatures up to 39°C (103°F), signaling that cooler days are on the horizon. Overall, September in Amakusa is a captivating time, where the lingering summer warmth gradually gives way to the more temperate charm of fall.
September marks a notable transition in Amakusa, Japan, as the region experiences 227 mm (8.9 in) of precipitation, spread over 15 rainy days. This significant amount of rainfall is part of a broader trend seen throughout the summer months, where precipitation peaks in July with an impressive 475 mm (18.7 in). Following the deluge of summer, September’s rainfall delivers a substantial yet softer volume, giving way to a more temperate atmosphere as autumn approaches. The drop from August’s 295 mm (11.6 in) suggests a gradual easing of the wet season, while also highlighting the sustained moisture that characterizes this coastal locale. Overall, September serves as a bridge, transitioning from the intense summer rains towards the drier spells of autumn.
As summer transitions into autumn, September in Amakusa, Japan, experiences a notable dip in humidity, settling at 84%. This marks a reduction from the peak levels of 92% in July and 91% in August, signaling a gradual shift towards a more comfortable atmosphere. While the humidity is still relatively high compared to the earlier months of the year, such as January's 75% and February's 71%, September's figures reflect a consistent pattern of decreasing humidity as the year progresses. This trend not only enhances outdoor activities but also prepares residents and visitors for the cooler and drier days of October ahead, making September a more pleasant time to explore the scenic beauty of Amakusa.
In September, Amakusa, Japan, experiences a UV Index of 11, categorized as extreme, which means sun exposure can lead to skin damage in as little as 10 minutes. This trend of heightened UV levels continues a pattern established during the summer months, peaking in August with a UV Index of 13. While September marks a slight decrease, it remains crucial for residents and visitors to adopt protective measures against harmful UV rays as summer transitions to autumn. Notably, the UV exposure level has been consistently high from April to September, emphasizing the importance of awareness and preparation. For more insights on protecting yourself from UV radiation, visit Amakusa UV Index.
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As summer transitions into autumn, September in Amakusa, Japan, boasts an impressive 264 hours of sunshine, continuing the region's trend of radiant daylight. After basking in the peak warmth of August's 305 hours, the sun begins to retreat slightly, yet remains a steadfast companion throughout early fall. This gradual decrease from the summer zenith is mirrored in the typical daylight patterns of previous months, peaking in April and May before following a gentle decline. While September may herald the start of the rainy season, the lingering warmth and ample sunshine offer a delightful backdrop for outdoor activities, encouraging visitors to savor the comforting rays as they embrace the transition into cooler months.
In September, the likelihood of sunny weather in Amakusa, Japan, stands at 35%, marking a slight improvement compared to the summer months, where sunshine drops to as low as 19% in July. This increase reflects a transitional period as the year shifts from the sweltering summer heat to the more temperate conditions of autumn. While September's sun chance remains modest, it is notably better than the rainy months of June and July. As the region approaches October, which boasts a 63% chance of clear skies, September serves as a gentle prelude to the more consistent sunshine that follows, making it a pleasant time to enjoy the lingering warmth before autumn fully sets in.
In Amakusa, Japan, the daylight duration in September offers a gentle transition from the long summer days. With 12 hours of daylight, September marks a gradual decrease from the height of sunshine experienced in June and July, where daylight peaked at 14 hours. As summer gives way to fall, daylight begins to dwindle, signaling the approach of autumn. This month provides a perfect balance, inviting residents and visitors alike to enjoy the lingering warmth and beauty of the changing season, before the days dip back to 11 hours in October and settle into the shorter daylight of winter. The rhythm of daylight in Amakusa presents a captivating shift, celebrating the passage of time through nature's light.
As summer transitions to autumn in Amakusa, September brings a gentle whisper of wind, with an average speed of 2.2 m/s (5 mph), marking a noticeable decline from the breezy summer months. This slight dip reflects a broader trend observed throughout the year, where the winds typically peak in the cooler months and lessen as the temperatures rise. Interestingly, after a relatively calm June with the lowest speeds recorded, there’s a gradual recovery in July and August before September ushers in a more subdued airflow. As the year winds down, one can't help but appreciate the delicate dance of seasons, where each month offers its own unique breeze, inviting reflection and connection to the natural world.
Weather in Amakusa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Amakusa, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present strikingly different weather patterns. In September, temperatures range from a mild 17°C (62°F) to a sweltering 35°C (95°F), with an average of 26°C (79°F). The month is characterized by high humidity at 84% and significant rainfall, totaling 227 mm (8.9 in) over approximately 15 days. In contrast, January experiences a much cooler climate, with temperatures varying from a chilling -2°C (29°F) to a maximum of 21°C (69°F) and an average of just 8°C (47°F). Precipitation is considerably lower in January, at 54 mm (2.1 in) over about 6 days, with humidity at 75%. For more details, you can refer to Amakusa weather in January.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 35°C (95°F) and an average of 26°C (79°F). This month also sees significant precipitation, with 227 mm (8.9 in) falling over 15 days, resulting in a humidity level of 84%. In contrast, February experiences much cooler temperatures, with a minimum of -2°C (29°F), an average of 9°C (49°F), and a maximum of 22°C (72°F). Precipitation is significantly lower at 91 mm (3.6 in) over just 9 days, accompanied by a humidity level of 71%. For more details on February weather, you can check Amakusa weather in February.
September and March present contrasting weather profiles, with September characterized by warmer temperatures and higher humidity. In September, daytime temperatures range from a minimum of 17°C (62°F) to a maximum of 35°C (95°F), with an average of 26°C (79°F). This month also sees significant precipitation, averaging 227 mm (8.9 in) over 15 days, resulting in a high humidity level of 84%. In stark contrast, March offers much cooler conditions, with temperatures fluctuating from a minimum of 3°C (38°F) to a maximum of 25°C (78°F), and an average temperature of 13°C (56°F). The precipitation is lower in March at 143 mm (5.6 in) over 12 days, accompanied by reduced humidity at 71%. For more detailed information on March weather, visit Amakusa weather in March.
In comparing the weather between September and April, it is evident that September is significantly warmer, with average temperatures reaching 26°C (79°F) and highs soaring up to 35°C (95°F). In contrast, April's temperatures are much cooler, with averages around 17°C (63°F) and highs maxing out at 29°C (84°F). Additionally, September experiences more precipitation, totaling 227 mm (8.9 in) over 15 rainy days, compared to April's 134 mm (5.3 in) across just 9 days. Despite being less rainy, April still retains a relatively high humidity level of 78%, slightly lower than September's 84%. For more detailed insights, you can check out Amakusa weather in April.
September and May present contrasting weather experiences. September boasts warmer average temperatures, ranging from a minimum of 17°C (62°F) to a maximum of 35°C (95°F), while May offers cooler conditions with temperatures from 10°C (50°F) to 30°C (86°F). Both months see similar precipitation levels—September with 227 mm (8.9 in) over 15 days and May with 224 mm (8.8 in) over 11 days. Humidity remains constant at 84% in both months, but the warmer temperatures of September can make the humidity feel more intense. For a closer look at May weather, visit Amakusa weather in May.
In comparing the weather of September and June, both months experience relatively warm temperatures, but September generally showcases slightly higher averages, with a minimum of 17°C (62°F) and an average of 26°C (79°F), peaking at 35°C (95°F). In contrast, June starts a bit cooler, featuring a minimum of 16°C (61°F) and an average of 24°C (76°F), with maximum temperatures reaching 32°C (90°F). Rainfall is more pronounced in June, totaling 298 mm (11.7 in) over 16 days, compared to September's 227 mm (8.9 in) across 15 days. Humidity levels remain high in both months, with September at 84% and June slightly higher at 86%. For more details, you can explore Amakusa weather in June.
In comparing the weather between September and July, September experiences slightly cooler temperatures, with a minimum of 17°C (62°F) and a maximum of 35°C (95°F), averaging around 26°C (79°F). In contrast, July tends to be warmer with a minimum of 20°C (68°F) and can reach up to 37°C (99°F), averaging 28°C (82°F). While both months see significant rainfall, July receives more precipitation at 475 mm (18.7 in) over 19 days, compared to September's 227 mm (8.9 in) over 15 days. Humidity levels are also higher in July at 92%, compared to 84% in September. For more detailed information about the weather in July, you can visit Amakusa weather in July.
When comparing the weather in September to August, September tends to be slightly cooler and less humid. The average temperature in September is around 26°C (79°F), with a minimum of 17°C (62°F) and a maximum of 35°C (95°F), whereas August is warmer, with an average of 29°C (85°F), a minimum of 21°C (69°F), and a maximum of 39°C (103°F). Additionally, September experiences 227 mm (8.9 in) of precipitation over 15 days, while August has higher rainfall, totaling 295 mm (11.6 in) also over 15 days. Humidity levels are slightly lower in September at 84% compared to 91% in August. For more detailed information on the weather in August, you can check Amakusa weather in August.
September experiences warmer temperatures with a minimum of 17°C (62°F) and an average of 26°C (79°F), peaking at a sweltering 35°C (95°F). In contrast, October sees a more moderate climate, with temperatures ranging from a cooler minimum of 11°C (52°F) and an average of 21°C (70°F), reaching up to a maximum of 33°C (92°F). Additionally, September brings significantly more rainfall, with 227 mm (8.9 in) over 15 days, compared to October's 120 mm (4.7 in) spread across just 9 days. While humidity remains high in both months, it slightly decreases in October to 83%, down from 84% in September. For more detailed information, you can check Amakusa weather in October.
September and November present quite contrasting weather conditions. In September, temperatures range from a minimum of 17°C (62°F) to a scorching maximum of 35°C (95°F), with an average temperature of 26°C (79°F). This month also sees significant rainfall, with 227 mm (8.9 in) of precipitation spread over 15 days, accompanied by high humidity levels around 84%. In contrast, November experiences much cooler temperatures, with a range from 5°C (41°F) to a maximum of 26°C (79°F), and an average of 15°C (59°F). Precipitation falls to 88 mm (3.5 in) over just 8 days, and humidity decreases slightly to 81%. These significant shifts mark a transition from the warm, wet conditions of late summer to the cooler, drier climate of late autumn. For more details, you can check Amakusa weather in November.
September and December present contrasting weather conditions, highlighting the transition from summer to winter. In September, temperatures range significantly, with a minimum of 17°C (62°F) and a peak reaching 35°C (95°F), while the average hovers around a warm 26°C (79°F). This month also experiences high humidity levels at 84% and substantial rainfall, totaling 227 mm (8.9 in) over 15 days. Conversely, December brings a cooler climate, characterized by a minimum temperature of 1°C (33°F) and an average of just 10°C (50°F), peaking at a milder 25°C (77°F). Precipitation decreases to 90 mm (3.5 in) over only 7 days, accompanied by slightly lower humidity at 79%. For more detailed insights on December weather, you can visit Amakusa weather in December.
As summer transitions to autumn, September in Amakusa offers a distinctive change in weather patterns. With warm temperatures still prevalent, the month averages a comfortable 26°C but can occasionally reach sweltering highs of 35°C. This month is characterized by increased humidity at 84%, adding a muggy feel to the air, especially with around 15 days of rainfall totaling 227 mm. This combination of warmth and moisture creates a unique tropical ambiance, setting September apart from the drier and cooler months of the year. For more detailed insights, visit Amakusa Climate.