Last updated: August 21, 2025
Tsushima, Japan, in August experiences dynamic weather characterized by its high temperatures. With maximums soaring up to 38°C (100°F) and an average of 29°C (84°F), the heat can be quite intense. The mild evenings bring some relief, with minimum temperatures around 19°C (67°F). This month also sees notable precipitation, totaling 253 mm (10.0 in) across 16 rainy days, contributing to a humidity level of 91% that accentuates the tropical climate. Travelers should be prepared for both sun and rain while enjoying the lush landscapes that thrive in these conditions.
In August, Tsushima, Japan, basks in the warmth of summer, with temperatures that truly reflect the season. The minimum temperatures hover around a comfortable 19°C (67°F), ensuring pleasant nights, while the average climbs to 29°C (84°F), offering plenty of sunshine for outdoor activities. The maximum can reach a sweltering 38°C (100°F), inviting beachgoers to cool off in the surrounding waters or seek shade under lush trees. This month stands out as one of the warmest, following a notable rise in temperatures since early spring, illustrating a clear and enticing trend toward balmy summer days that make Tsushima a vibrant destination.
In August, Tsushima experiences significant rainfall, with an impressive 253 mm (10.0 in) of precipitation over 16 days. This marks a notable drop from July’s torrential 384 mm (15.1 in), while still contributing to the island's lush landscapes. The rain in August helps maintain the humidity that characterizes the summer months, as the frequent showers often bring refreshing relief from the heat. The trend of increasing precipitation from early spring peaks in the summer, and despite a slight reduction in August, the island remains vibrant and alive with the nourishing rains that support its rich ecosystem. As September approaches, the precipitation begins to taper off, with a forecasted amount of 225 mm (8.9 in), signaling a transition into the autumn months.
In August, Tsushima, Japan, experiences a high humidity level of 91%, which reflects a noticeable trend of increasing moisture as summer progresses. Starting the year with a relatively comfortable 82% in January, humidity levels gradually rise through the months, peaking in July at an impressive 93%. Although August sees a slight dip, it still remains significantly humid, contributing to the island’s lush landscapes and vibrant natural beauty. Following this peak, humidity begins to taper off again in the cooler months, dropping to 87% in September and settling around 85% by October, hinting at the seasonal transition to autumn. Overall, the humidity levels in Tsushima not only shape the island's climate but also echo the rhythms of nature throughout the year.
In August, Tsushima, Japan, continues to experience the extreme UV Index of 11, requiring vigilant sun protection as the burn time is a brief 10 minutes. This peak in UV exposure mirrors the previous months of June and July, where the UV levels have fared similarly high, highlighting a trend of intense sun exposure during summer. Following this, the UV Index is set to decrease in September, transitioning to a very high index of 10, allowing for a slight reprieve before fall settles in. As the seasons change, it's crucial to stay informed and proactive in sun safety. For more details on UV levels throughout the year, visit Tsushima UV Index.
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August shines as the sunniest month in Tsushima, Japan, boasting an impressive 300 hours of sunshine. This peak illuminates a delightful trend, as the summer months consistently offer more daylight, with May through August all surpassing the 250-hour mark. Following August, the sunshine gradually wanes into autumn, where hours dip to 244 hours in September and further to 234 hours in October. Despite this decrease, the overall trend reveals a notable increase in sunshine from the beginning of the year, culminating in the vibrant warmth of summer, making Tsushima a radiant destination for sun seekers.
In August, the likelihood of sunny weather in Tsushima, Japan dips to 27%, which is quite low compared to the year’s earlier months. As summer progresses, particularly from June to July, sun chances are on a downward trend, highlighting the transition into a more humid and overcast period. The weather begins to improve again in October, where the probability of sunny days rises to 56%. This trend suggests that while August may not be the best month for sun-seekers, those visiting later in the year will find more favorable conditions to enjoy the beauty of Tsushima.
In August, Tsushima, Japan experiences a shift in daylight hours, boasting about 13 hours of sunlight. This marks a slight decrease from the peak 14 hours enjoyed during the summer months of June and July, emphasizing the gradual transition towards autumn. As the year progresses, daylight durations consistently diminish, with the longest days occurring in late spring and mid-summer. The gradual decline from May’s 14 hours serves as a reminder of nature’s cyclical rhythms, allowing residents and visitors alike to relish the vibrant late-summer landscapes before the shorter days of September and October arrive.
The August wind in Tsushima, Japan, offers a gentle breeze with an average speed of 2.3 m/s (5 mph), marking a slight uptick from the notably calm summer months of July and June, which recorded their lowest speeds at 1.6 m/s (4 mph) and 2.1 m/s (5 mph) respectively. As we move through the year, a clear trend emerges: the winds tend to pick up in the spring months, peaking at 3.0 m/s (7 mph) in March and April, before tapering off in the summer. Interestingly, while August's winds are milder than in spring, they are resilient enough to refresh the sultry summer air, providing a subtle reminder of the island’s dynamic coastal climate. As autumn approaches, wind speeds fluctuate slightly but remain within the 2.2 to 1.7 m/s range, hinting at the return of the more robust breezes typical of earlier in the year.
Weather in Tsushima varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Tsushima, focusing on differences in temperature, rainfall, humidity, and UV levels.
August and January present stark contrasts in weather. In August, temperatures soar with a minimum of 19°C (67°F) and an average of 29°C (84°F), peaking at a scorching 38°C (100°F). Additionally, the month is characterized by heavy rainfall, with 253 mm (10.0 in) of precipitation over 16 days and high humidity at 91%. In contrast, January experiences a significant drop in temperatures, with a minimum of -5°C (23°F), an average of 5°C (41°F), and a maximum of 18°C (64°F). Precipitation is also much lower, totaling 52 mm (2.0 in) over just 7 days, and humidity remains relatively high at 82%. For more details on January weather, you can check out Tsushima weather in January.
August and February present starkly contrasting weather experiences. In August, temperatures soar with a minimum of 19°C (67°F) and an average high of 29°C (84°F), occasionally reaching a scorching 38°C (100°F). The month is notably humid, with 91% humidity and significant rainfall of 253 mm (10.0 in) spread over 16 days. In contrast, February offers a chilly climate, where temperatures can drop to a minimum of -5°C (24°F) and average only 6°C (42°F), peaking at a still-mild 22°C (71°F). Rainfall is much less frequent in February, accumulating to 59 mm (2.3 in) over just 6 days, accompanied by a lower humidity level of 79%. For more specific details about February weather, check out Tsushima weather in February.
August and March present quite contrasting weather patterns. In August, temperatures soar, with averages around 29°C (84°F) and maximums reaching up to 38°C (100°F), accompanied by high humidity levels of 91%. This month also experiences substantial precipitation, with 253 mm (10.0 in) falling over 16 days. In stark contrast, March offers a much cooler climate, with average temperatures of only 10°C (50°F) and highs of 25°C (77°F). Precipitation is lower at 151 mm (6.0 in) over 11 days, and the humidity is more comfortable at 74%. For a deeper look at March weather, you can check Tsushima weather in March.
The weather in August is characterized by much warmer temperatures, with nightly lows around 19°C (67°F) and average highs reaching up to 29°C (84°F), peaking at a sizzling 38°C (100°F). In contrast, April experiences a significant chill, with temperatures ranging from a low of -1°C (31°F) to a comfortable average of 14°C (58°F) and a maximum of 29°C (84°F), making it one of the cooler months. Additionally, August is marked by high humidity levels at 91% and measurable precipitation on 16 days, accumulating a total of 253 mm (10.0 in). Meanwhile, April has more moderate humidity at 76% and less rainfall, with 163 mm (6.4 in) over about 10 days. For more details on April weather, you can check Tsushima weather in April.
In comparison to May, August experiences significantly warmer temperatures, with averages peaking at 29°C (84°F) and highs reaching up to 38°C (100°F). In contrast, May's temperatures are milder, ranging from a minimum of 5°C (42°F) to a maximum of 32°C (90°F), averaging around 19°C (67°F). Precipitation is more prevalent in August, with 253 mm (10.0 in) over 16 days, compared to May’s 196 mm (7.7 in) over 11 days. Additionally, humidity levels are higher in August at 91%, compared to May's 83%. For more details, you can visit Tsushima weather in May.
In comparison to June, August experiences significantly warmer temperatures, with minimums around 19°C (67°F) and maximums reaching up to 38°C (100°F), contrasting with June's cooler range of 12°C (54°F) to 33°C (91°F). The average temperature in August is higher at 29°C (84°F), compared to June's average of 23°C (74°F). Additionally, August faces increased precipitation, totaling 253 mm (10.0 in) over 16 days, while June sees 196 mm (7.7 in) of rain over 14 days. The humidity also rises slightly in August to 91%, compared to June's 87%. For a more detailed look at June weather, you can visit Tsushima weather in June.
In comparing the weather between July and August, both months experience high temperatures, but August tends to be slightly hotter on average, with temperatures ranging from a minimum of 19°C (67°F) to a maximum of 38°C (100°F), compared to July's range of 20°C (67°F) to 38°C (101°F). However, July is characterized by considerably higher rainfall, with 384 mm (15.1 in) over 23 days, whereas August sees a reduction in precipitation to 253 mm (10.0 in) over 16 days. Humidity levels remain high in both months, with July averaging 93% compared to August’s 91%. For more details, you can visit Tsushima weather in July.
August and September showcase a noticeable shift in weather patterns. In August, temperatures soar with a minimum of 19°C (67°F) and an average high of 29°C (84°F), reaching up to 38°C (100°F) on the hottest days. The month is marked by high humidity at 91% and substantial precipitation, totaling 253 mm (10.0 in) over 16 days. By contrast, September sees a drop in temperatures, with a minimum of 12°C (54°F) and an average high of 25°C (76°F), peaking at 37°C (98°F). Although precipitation remains frequent at 225 mm (8.9 in) over the same number of days, humidity decreases slightly to 87%. For a more detailed overview of September weather patterns, you can visit Tsushima weather in September.
In comparing the weather between August and October, significant differences emerge. August typically boasts much higher temperatures, with minimums around 19°C (67°F) and maximums reaching up to 38°C (100°F), while October sees cooler temperatures, ranging from a minimum of 7°C (44°F) to a maximum of 32°C (90°F). Despite being slightly less humid in October at 85%, it remains relatively humid compared to summer months. Precipitation levels are quite similar, with August experiencing 253 mm (10.0 in) over 16 days and October seeing 246 mm (9.7 in) over just 14 days. For more detailed insights, you can check the Tsushima weather in October.
August and November present starkly contrasting weather conditions. In August, temperatures soar with a minimum of 19°C (67°F) and an average high of 29°C (84°F), peaking at a sweltering 38°C (100°F). This month is also characterized by heavy rainfall, accumulating 253 mm (10.0 in) over 16 days, and high humidity levels at 91%. In contrast, November brings a significant drop in temperature, with a minimum of 1°C (33°F) and an average of 13°C (55°F), reaching a maximum of 24°C (76°F). Precipitation decreases dramatically to 61 mm (2.4 in) over just 5 days, accompanied by slightly lower humidity at 83%. For those interested in more detailed weather trends, check out Tsushima weather in November.
August and December present stark contrasts in weather conditions. In August, temperatures soar with a minimum of 19°C (67°F) and an average high of 29°C (84°F), peaking at a scorching 38°C (100°F). This month also sees significant rainfall, with 253 mm (10.0 in) over 16 days, accompanied by high humidity at 91%. In contrast, December experiences much cooler temperatures, with minors dipping to -5°C (24°F) and an average of just 7°C (45°F), while the maximum reaches 20°C (68°F). Precipitation decreases dramatically to 68 mm (2.7 in) across only 7 days, and humidity settles slightly lower at 83%. For more details about the weather in December, you can visit Tsushima weather in December.
August on Tsushima brings a distinct blend of intense heat and humidity, setting it apart from other months. With average temperatures soaring to 29°C (84°F) and peaks reaching an eye-watering 38°C (100°F), it's a time when the island basks in the summer sun. However, this warmth is accompanied by high humidity levels of 91%, making the air feel even heavier. Frequent rainfall, with about 253 mm over 16 days, provides brief respite but also contributes to the overall sultry atmosphere. For those wishing to delve deeper into Tsushima's climate and seasonal variations, check out Tsushima Climate.