Weather in Tokunoshima

Planning a trip to Tokunoshima? Check out the latest forecasts and weather charts in this section to ensure your journey is as comfortable as possible.

The climate of Tokunoshima can be described as humid subtropical, providing the island with warm and comfortable weather practically year-round. There is no severe cold here: even in the coolest months, January and February, the average temperature confidently holds at the +16...+17°C mark. This makes the island an attractive destination for travellers in any season, especially for those seeking a mild climate without sharp temperature fluctuations.

Summer on the island is hot but not extreme, with averages around +28°C in July and August. Spring and late autumn delight with pleasant warmth in the +20...+25°C range, which is ideal for active recreation and walks. The temperature regime here is notable for its enviable stability, creating favourable conditions for the lush vegetation for which this region of Japan is famous.

However, tourists should take into account the high probability of precipitation. Rain on Tokunoshima is a frequent and regular occurrence throughout the year, with the number of rainy days ranging from 12 to 20 per month. The wettest periods are June, marking the rainy season, and September. When packing for your trip, be sure to bring an umbrella or raincoat, as the weather can be changeable even during sunny periods.

The climate on Tokunoshima is distinguished by its mildness and lack of sharp fluctuations, making the island attractive to visit practically all year round. The annual temperature range is quite narrow: the coldest month is January with an average of 16.6°C, while the peak heat occurs in August, when the air warms up to an average of 28.4°C. Even in the winter months, there are no frosts, and the weather is more reminiscent of a pleasant spring.

The summer period on the island is long and warm. Starting from June through September, average temperatures consistently stay above 25°C. In July and August, it becomes truly hot, but without extreme sweltering heat: maximum average values rarely exceed 29°C. Winter, on the contrary, is very gentle: in December and February, thermometers show from 16°C to 18°C, allowing you to comfortably explore the island without the need to bundle up in warm clothes.

A remarkable feature of Tokunoshima's temperature regime is the surprisingly small difference between day and night readings. According to statistics, the amplitude of fluctuations during the day is often only 1–2 degrees (for example, in April the minimum is 19.7°C, and the maximum is 21.7°C). Such thermal stability means that evenings here remain almost as warm as the days, and tourists need not fear sudden night-time chills.

Precipitation on Tokunoshima falls exclusively as rain, as thanks to the subtropical climate, the temperature here remains comfortable year-round. Travellers should consider that rainy days on the island are a frequent occurrence, and humidity is usually high. Even in the "driest" periods, an umbrella or raincoat will become indispensable companions on your trip.

The most pronounced rainy season falls at the beginning of summer. The wettest month is June, when the highest amount of precipitation falls (average 14 mm) and about 19 rainy days are recorded. The second peak in rain frequency is observed in September: in this month, precipitation can fall over the course of 20 days, making it the cloudiest period of the year.

If you are looking for the time with the lowest probability of rain, it is worth paying attention to April and November. These months record the minimum number of rainy days (about 12), which increases the chances of clear weather for walks and sightseeing. In winter, precipitation is generally not heavy (about 4 mm) but quite frequent — it can rain for approximately half the month.

Tokunoshima features a mild subtropical climate, so you certainly won't need heavy winter clothing here. Even in the coolest months — January and February — the average temperature holds around 16–17°C, making the island comfortable to visit all year round. However, consider the high humidity and frequent precipitation: the number of rainy days is consistently high in any season (from 12 to 20 days a month), so protection against moisture should be the main priority when packing.

If you are planning a trip in summer, choose clothes made of light natural fabrics, as in July and August the air warms up to 28°C. Be especially prepared for rain in June and September — these are the wettest months. For travel in winter and the shoulder seasons, the layering principle is ideal: take t-shirts, light jumpers, and definitely a windbreaker to protect yourself from the sea breeze and evening coolness.

Be sure to include a compact umbrella or a high-quality raincoat that fits easily into a backpack in your list of essentials. For long walks around the island, you will need comfortable, non-slip, and preferably quick-drying shoes. Additionally, despite the cloudiness, the sun in the south of Japan can be active, so sunscreen, sunglasses, and a hat will come in handy starting from April until the very end of October.