Weather in Yoronjima

Stay informed about the current weather conditions in Yoronjima before starting your journey. In this section, we have gathered the latest data, clear charts, and accurate forecasts for you.

Yoronjima's climate can be described as humid subtropical, making this island an attractive destination for warmth lovers at any time of the year. There are no severe frosts here: even in the coldest winter months, January and February, the average temperature holds at a comfortable level of about +17…+18°C. Summer brings real heat, when the thermometer consistently exceeds +28°C, creating ideal conditions for a beach holiday.

Throughout the year, the weather remains quite stable, however, tourists should consider the high probability of precipitation. June and September stand out in particular, when the number of rainy days reaches a maximum (up to 19–20 days per month), marking the rainy season and the period of possible typhoons. At other times, rain is also possible, but it generally does not interfere with enjoying the mild maritime climate and the beauty of nature in Japan.

The climate on Yoronjima island is distinguished by enviable mildness and stability, offering tourists comfortable conditions almost all year round. January is considered the coolest period, however, even at this time, the average temperature stays at 17.3°C, which resembles a warm spring. As summer approaches, the air gradually warms up, reaching its peak in August, which is the hottest month with an average of about 28.3°C.

The summer season here is characterized by consistent warmth: from June to September, the thermometer confidently stays in the range of 26°C – 28°C. This time is excellent for sun and sea lovers. Winter in Yoronjima is very mild; in the period from December to February, the temperature rarely drops below 16°C even at the coolest moments (January and February minimums are about 16.3°C – 16.9°C), allowing for comfortable exploration of the island without heavy winter clothing.

An interesting feature of the local temperature regime is the minimal daily fluctuations. Judging by statistics, the difference between daily highs and nightly lows here is extremely insignificant — often it is only about 1–2 degrees. Thanks to this, evenings and nights on the island remain almost as warm as the days, eliminating the need to wrap up warmly after sunset.

In Yoronjima, thanks to the warm climate, precipitation falls exclusively as rain, and snow does not occur here even in the coolest months. Travellers should note that rain here is a fairly regular occurrence throughout the year. Even in the most stable periods, the number of days with precipitation rarely drops below twelve per month, so a light raincoat or umbrella will be indispensable items in your luggage.

The wettest period is the beginning of summer. The peak in precipitation volume falls in June (about 12 mm), when the number of rainy days reaches 19. Another notable period of unstable weather is observed in September: although the volume of water is less, rains occur very frequently — on average about 20 days per month, which may require adjustments to beach holiday plans.

If you are looking for the time with the least amount of precipitation, it is worth paying attention to spring and late autumn. April and November are considered relatively dry months: precipitation levels decrease to 4 mm, and the number of rainy days is about 12. This time is best suited for walks, as the probability of prolonged downpours in these months is minimal.

Since Yoronjima features a warm subtropical climate, in the summer months (from June to August), when the temperature reaches 28–29°C, you will need light and breathable clothing made from natural fabrics such as cotton or linen. Be sure to bring swimwear, sunglasses, and a hat, as the sun here can be very active. Do not forget reliable sunscreen with a high protection factor to comfortably spend time on the island's picturesque beaches.

Given that rainy days happen quite often throughout the year (especially in June and September), a compact umbrella or a high-quality raincoat will become your best companions on the trip. In winter and the off-season, the temperature remains quite mild and comfortable (on average about 17–19°C), so you definitely won't need heavy down jackets. However, for evening walks and windy days by the sea, it is worth packing a hoodie, a light sweater, or a windbreaker to feel cosy.

To explore the island, choose comfortable and proven walking shoes that are suitable for both city streets and nature trails. Sandals or flip-flops are also necessary for visiting the beaches. In the spring and autumn months, when the weather can be changeable, it is better to stick to the principle of layering in clothing: a T-shirt combined with a light cardigan will allow you to quickly adapt to temperature changes during the day.