Weather in Ishigaki

Stay up to date with the latest weather conditions in Ishigaki. In this section, you will find current data, forecasts, and useful weather charts to help plan your day.

The city of Ishigaki in Japan boasts a pleasant subtropical climate, ensuring warm weather throughout the year. Temperature fluctuations here are minimal, making it comfortable to visit in almost any season, with average temperatures ranging from 19.4°C in January to 28.9°C in July.

In Ishigaki, two main periods can be distinguished: a hotter and more humid summer, lasting roughly from May to October, and a mild, comfortable winter from November to April. In summer, especially in July and August, the average air temperature reaches 28-29°C, creating ideal conditions for a beach holiday. In winter, the thermometer rarely drops below 18°C, with averages hovering around 19-21°C, which is also very pleasant for walking and exploring the island.

A characteristic feature of the Ishigaki climate is a consistently high number of days with precipitation throughout the year – from 15 to 21 days per month. However, the total amount of precipitation remains relatively low (from 4 to 8 mm per month), indicating frequent but usually light rain or drizzle. The highest rainfall (8 mm) and the highest number of rainy days (up to 19-21) usually occur between August and December, yet even during these months, the weather remains predominantly warm.

The weather in Ishigaki is characterized by a warm subtropical climate year-round, making it an attractive destination for tourists at any time. The hottest month is usually July, when the average air temperature is 28.9°C, and maximum daytime values reach 29.7°C. August is also very warm, with an average temperature of 28.6°C. The coolest month is considered January, where the average temperature holds at 19.4°C, with average lows of 18.4°C and highs of 20.4°C. Overall, the annual temperature progression in Ishigaki is quite smooth, without sharp fluctuations.

The summer months in Ishigaki, from June to September, are distinguished by consistently high temperatures. Average daytime figures during this period range from 27.9°C in June and September to a peak of 28.9°C in July. Nights also remain very warm, with average minimum temperatures around 27-28°C. The difference between day and night temperatures in the summer season is small, usually not exceeding 1-2 degrees, creating a sensation of constant warmth. The high humidity characteristic of this period due to frequent rainfall can intensify the feeling of heat.

The winter period in Ishigaki, from December to February, is notable for its mildness and comfort. Average temperatures in the coldest months, January and February, are 19.4°C and 20.2°C respectively. During the day, the air warms up to an average of 20-22°C, and at night the temperature drops to 18-20°C. Daily temperature fluctuations in winter are also minimal, ensuring pleasant, non-cold weather. Even in December, the average temperature is a comfortable 21.0°C, making winter in Ishigaki very mild.

In Ishigaki, precipitation occurs throughout the year, and the city does not have a distinctly dry season. The number of days with precipitation is fairly constant, ranging on average from 15 to 21 days per month. This means that regardless of the time of your visit, there is a high probability of encountering rain, although the intensity and total volume of this precipitation have their own peculiarities.

Despite the frequency of rainy days, the total monthly rainfall in Ishigaki remains small. The "wettest" months in terms of moisture volume are considered August and September, when an average of 8 mm of precipitation is recorded. At the same time, August sees about 19 rainy days, and September sees 18. Interestingly, the highest number of days with precipitation falls in December – an average of 21 days, although the total rainfall in this month is about 6 mm. This pattern suggests that precipitation most often takes the form of light rain or drizzle rather than heavy downpours.

The period with the lowest rainfall volume falls in January, February, and March, when only 4 mm falls per month. Nevertheless, even in these months, the number of rainy days remains significant: 18 days in January, 16 in February, and 15 in March. The lowest number of rainy days in the year is observed in March and April (15 days each). Thus, even in the "driest" months by rainfall volume, one should be prepared for frequent but usually light and short-lived rains in Ishigaki.

When planning a trip to Ishigaki, it is worth considering its warm and humid subtropical climate with frequent rainfall throughout the year. The foundation of your wardrobe should be light, breathable clothing made from natural fabrics such as cotton or linen. Since the number of rainy days is significant in every month (from 15 to 21), a compact umbrella and a light waterproof jacket or raincoat will become indispensable companions on your journey. Do not forget sunscreen with high SPF, sunglasses, and a hat to protect against the active sun, even on cloudy days. Comfortable walking shoes, perhaps sandals or quick-drying trainers, will make your walks around the city and surroundings comfortable.

Although there are no sharp temperature contrasts between seasons in Ishigaki, some nuances are still worth noting. In the "coolest" months, from December to February, the average temperature holds around 19-21°C. During this time, as well as for evening walks or visiting air-conditioned premises in other months, a light sweater, fleece, or windbreaker will come in handy. In summer, especially from June to September, when the average temperature reaches 28-29°C, preference should be given to the lightest and most open clothing possible. The principle of layering in clothing will be very useful, allowing you to easily adapt to weather changes or when moving from the street into a cool room.

Given the high humidity and frequent rains, clothing made from quick-drying synthetic fabrics can prove to be a very practical choice. If you plan to enjoy the famous beaches of Ishigaki, be sure to bring swimwear. Also, especially in the warm season and for evening walks in nature, insect repellent may be needed. In general, prepare for warm weather with a high probability of precipitation, and your holiday in Ishigaki will be comfortable.