Climate Insights for Ishigaki

The climate in Ishigaki is warm and mild. The average annual temperature is 25°C and approximately 2021mm of precipitation falls per year. Ishigaki receives a notable amount of rainfall throughout the year, including during its driest month. Ishigaki is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, March, when temperatures can drop to 19°C.

Ishigaki has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is July, when average highs reach 29°C and the mean temperature sits around 29°C. February is the coolest month, with minimum temperatures around 19°C and an average of 20°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Ishigaki is a very wet location, receiving approximately 2021mm of precipitation annually, which averages out to around 168mm per month. The wettest month is August, averaging 257mm of rainfall. September and December also tend to see above-average precipitation. The driest month is February, with just 107mm. That's 151mm less than August, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Ishigaki is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 4km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 8km/h in winter, 6km/h in spring, 6km/h in summer, 8km/h in autumn.

It is currently summer in Ishigaki, which began on June 21, 2026. Ishigaki is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 29°C, while the coldest stretch bottoms out in February near 19°C. Autumn is next, beginning on September 23, 2026 — 90 days from now.

The table below shows monthly climate averages for Ishigaki based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.