Last updated: August 21, 2025
In September, Tsushima, Japan, experiences a delightful transition into autumn, characterized by an average temperature of 24°C (76°F), with maximums reaching up to 29°C (85°F) and minima dipping to 19°C (67°F). The month is marked by a high humidity level of 80%, contributing to the tropical feel of the region. Rainfall is considerable, with an average precipitation amount of 296 mm (11.7 in) spread over 14 days, making it a month of lush landscapes and vibrant natural beauty. Visitors can expect a mix of sun and rain, perfect for exploring the island’s rich cultural heritage and stunning scenery.
September in Tsushima, Japan marks a delightful transition from the sweltering summer heat to the mildness of autumn. With temperatures ranging from a minimum of 19°C (67°F) to a pleasant average of 24°C (76°F), the island experiences a perfect blend of warmth and comfort. The days remain balmy, peaking at 29°C (85°F), allowing for ample opportunities to enjoy the stunning natural landscapes and beach activities. This month showcases a notable cooldown compared to August's highs, yet still retains a hint of summer's lingering warmth, making it an ideal time for both relaxation and exploration before the cooler months set in. As the environment shifts, so does the vibrant scenery, enchancing the island's charm and inviting visitors to bask in its unforgettable atmosphere.
September in Tsushima, Japan, is characterized by a significant surge in precipitation, recording an impressive 296 mm (11.7 in) of rainfall across 14 days. This robust downpour marks the peak of the wet season, following the already high levels of August. As summer transitions into autumn, the amount of rain in September notably exceeds that of its predecessors, such as July and August, which had 273 mm and 171 mm, respectively. This trend highlights Tsushima's reputation for heavy rainfall during this time, as the island experiences the consequences of seasonal changes and tropical influences, making September a key month for precipitation in the region.
In September, Tsushima, Japan, experiences a notable shift in humidity levels, with an average of 80%. This is a decline from the peak summer months, where humidity soared to 95% in July and 93% in August. The gradual decrease reflects the transition to autumn, but humidity remains elevated compared to earlier months in the year, such as March's low of 65% and February's 67%. As the year progresses from the sultry midsummer, September's humidity still embodies the lingering warmth of summer while hinting at the drier days to come, creating a unique atmosphere that defines the early fall season in this charming locale.
In September, Tsushima, Japan, experiences a significant drop in UV radiation compared to the peak summer months, with a UV Index of 10, categorized as very high. This marks a transition from the extreme levels of July and August, where exposure times were a mere 10 minutes. As autumn approaches, sun seekers should still exercise caution, as the burn time remains at 15 minutes. This month serves as a reminder of the waning summer sun while still necessitating protective measures; check the forecast and stay informed with Tsushima UV Index to ensure safe sun exposure.
UV Risk Categories
September in Tsushima, Japan, marks a gentle transition as the summer's vibrant sunshine begins to wane. With 257 hours of sunlight, this month follows August's peak of 313 hours, showcasing a gradual decrease as autumn sets in. The trend in hours of sunshine reflects a clear seasonal shift: from the bright and long days of mid-summer, the light gradually diminishes, yet September still holds its charm with ample sunshine compared to earlier months like June and July. This shift inspires a unique beauty, as the warm rays illuminate the island's captivating landscapes, making September a delightful time to embrace the lingering warmth of summer before the cooler months arrive.
In September, the chance of enjoying sunny weather in Tsushima, Japan hovers around 29%, marking a noticeable dip compared to the preceding summer months, which struggle to break the 31% mark in August and a low of 24% in July. This trend suggests that as the season transitions into autumn, the opportunities for sunshine lessen significantly. However, the outlook improves drastically in the following months, with October and November showcasing a robust 54% and 53% chance of sun, respectively. Thus, while September may not be the ideal month for sun-seekers, the returning clarity in weather patterns soon after offers a promising respite.
As September arrives in Tsushima, Japan, the daylight begins to subtly shift, offering 12 hours of light—slightly less than the 14 hours enjoyed in the height of summer. This gradual decrease signals the transitional nature of the season, as the days succinctly shorten ahead of the cooler months. The trend reveals a pattern of increasing daylight from January through June, peaking in July, before gently tapering off. While September still enjoys a generous amount of sunlight, it hints at the upcoming autumnal retreat into the cozy embrace of shorter days, making it a perfect time for enjoying the natural beauty of the archipelago.
As summer transitions to autumn, September winds in Tsushima, Japan, exhibit a noticeable uptick with an average speed of 7.5 m/s (17 mph)—a refreshing breath compared to the gentle breezes of June and July. This month marks a shift from the sultry humidity of summer, as the winds begin to carry a hint of the crispness of fall. Interestingly, September's winds are more robust than the preceding months, echoing the lively gusts of November. With each passing month from January through September, a subtle pattern emerges: after a peak in winter months, a gradual decline in wind speeds is observed through the summer, followed by an invigorating resurgence into the autumn season, setting a dynamic stage for the enchanting landscapes of Tsushima.
Weather in Tsushima varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Tsushima, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 29°C (85°F) and an average of 24°C (76°F). This month experiences significant precipitation, averaging 296 mm (11.7 in) over 14 days. In stark contrast, January features much cooler temperatures, with a minimum of -2°C (28°F), an average of 8°C (47°F), and a maximum of 19°C (66°F). The precipitation in January is significantly lower at 68 mm (2.7 in) over 8 days, and humidity is also reduced to 72%. For a detailed look at January weather, check out Tsushima weather in January.
September and February present stark contrasts in weather. In September, temperatures typically range from a pleasant 19°C (67°F) to a maximum of 29°C (85°F), accompanied by high humidity levels reaching 80%. The month also sees significant rainfall, with 296 mm (11.7 in) falling over an average of 14 days. In contrast, February brings much cooler conditions, with temperatures dipping to a minimum of -1°C (31°F) and averaging around 8°C (47°F). Precipitation is considerably lower in February, totaling only 59 mm (2.3 in) over about 8 days and accompanied by a relative humidity of 67%. For more specific insights into the weather during this month, you can check Tsushima weather in February.
September weather is marked by considerably warmer temperatures, with a minimum of 19°C (67°F) and an average of 24°C (76°F), reaching highs of 29°C (85°F). In contrast, March is much cooler, with minimum temperatures dipping to 4°C (40°F) and averaging only 12°C (54°F), peaking at 17°C (64°F). Furthermore, September experiences significantly higher rainfall, accumulating 296 mm (11.7 in) over 14 days, while March sees a milder precipitation of 127 mm (5.0 in) across 10 days. Additionally, the humidity levels are higher in September at 80%, compared to 65% in March. For more insights on March weather, you can visit Tsushima weather in March.
September and April present quite contrasting weather conditions. In September, temperatures are generally warm, with a minimum of 19°C (67°F) and an average high of 29°C (85°F), complemented by significant precipitation of 296 mm (11.7 in) over about 14 days, resulting in a humid atmosphere with 80% humidity. In contrast, April offers a much cooler climate, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 20°C (69°F), and significantly lower precipitation at 122 mm (4.8 in) over just 8 days, and humidity at 75%. For a detailed look at April’s climate, you can check Tsushima weather in April.
In September, the weather is notably warmer, with average temperatures ranging from a minimum of 19°C (67°F) to a maximum of 29°C (85°F), while May offers cooler temperatures, averaging between 12°C (53°F) and 22°C (72°F). Additionally, September experiences significantly higher precipitation, totaling 296 mm (11.7 in) over approximately 14 days, compared to May's milder 116 mm (4.6 in) across 8 days. Both months exhibit high humidity levels, with September at 80% and May slightly higher at 83%. For a detailed look at travel conditions, check out Tsushima weather in May.
In comparing the weather conditions of September and June, September tends to be warmer with average temperatures ranging from 19°C (67°F) to a maximum of 29°C (85°F), while June's average temperatures are slightly lower, averaging between 17°C (64°F) and 25°C (77°F). However, September experiences significantly higher rainfall, with 296 mm (11.7 in) over 14 days, compared to June's 159 mm (6.3 in) across 9 days. Additionally, while humidity remains high in both months, September's relative humidity is notably lower at 80%, compared to June's 87%. For more detailed information on weather patterns, you can check Tsushima weather in June.
In comparing the weather between September and July, September typically presents slightly cooler temperatures, with a minimum of 19°C (67°F) and an average of 24°C (76°F), while July’s temperatures are warmer, averaging 25°C (77°F) and peaking at 30°C (86°F). Both months experience notable precipitation, with September receiving about 296 mm (11.7 in) compared to July's 273 mm (10.8 in), despite having the same number of rainy days (14). Additionally, September has a lower humidity level at 80%, while July is characterized by a higher humidity level of 95%. For more details on July's climate, you can refer to Tsushima weather in July.
In comparing the weather between September and August, September experiences a noticeable drop in temperatures, with minimums around 19°C (67°F) and average highs of 29°C (85°F), compared to August's warmer minimum of 23°C (73°F) and maximum of 31°C (87°F). Additionally, September sees increased precipitation with 296 mm (11.7 in) spread over 14 days, while August has less rainfall at 171 mm (6.7 in) over 13 days. Humidity levels remain high in both months, but September's 80% is lower than August's higher 93%, suggesting a slightly more comfortable atmosphere as summer transitions into fall. For more detailed insights about August weather specifically, you can refer to Tsushima weather in August.
September and October present a noticeable shift in weather patterns. In September, temperatures range from a minimum of 19°C (67°F) to a maximum of 29°C (85°F), with an average of 24°C (76°F). This month also sees significant precipitation, totaling 296 mm (11.7 in) over about 14 days, accompanied by high humidity at around 80%. In contrast, October cools down, with temperatures dropping to a minimum of 12°C (55°F) and an average of 20°C (69°F), peaking at 27°C (80°F). The month experiences much less rainfall, with 118 mm (4.7 in) over 9 days, and slightly lower humidity at 77%. The transition from September to October marks a shift from warm, wet conditions to cooler, drier weather, making October a more pleasant month overall. For more specific details about the weather in October, visit Tsushima weather in October.
In September, the weather is characterized by warm temperatures, with a minimum of 19°C (67°F) and an average high of 29°C (85°F). The month experiences significant rainfall, totaling 296 mm (11.7 in) over about 14 days, accompanied by high humidity levels at 80%. In contrast, November brings a noticeable chill, with temperatures ranging from a minimum of 6°C (44°F) to an average maximum of 22°C (72°F). Precipitation decreases significantly to 44 mm (1.7 in) over just 8 days, and humidity dips slightly to 75%. For more details on the conditions in November, you can check out Tsushima weather in November.
September weather features warm temperatures with an average of 24°C (76°F) and highs reaching up to 29°C (85°F), accompanied by significant rainfall of 296 mm (11.7 in) over 14 days, creating a humid atmosphere with humidity levels around 80%. In contrast, December brings much cooler temperatures, with averages dropping to 10°C (50°F) and maximums reaching only 20°C (69°F). The precipitation decreases considerably to 60 mm (2.4 in) over just 7 days, and humidity levels also lower to 73%. For a more detailed look at the weather in December, you can check out Tsushima weather in December.
As September unfolds in Tsushima, it marks a transition into milder weather compared to the sweltering summer months. The temperature becomes more pleasant, averaging around 24°C (76°F), offering a welcome relief from the heat. While the humidity remains notably high at 80%, September experiences increased rainfall, with about two weeks of precipitation. This shift in weather creates a lush and vibrant environment, perfect for exploring the island's natural beauty. For a deeper dive into Tsushima’s climate patterns, visit Tsushima Climate.