Climate Insights for Shikinejima

The climate in Shikinejima is warm and mild. The average annual temperature is 18°C and approximately 2321mm of precipitation falls per year. Shikinejima receives a notable amount of rainfall throughout the year, including during its driest month. Shikinejima is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are February, January, March, when temperatures can drop to 9°C.

Shikinejima sees moderate temperature variation throughout the year, ranging from 9°C to 27°C. The warmest month is August, when average highs reach 27°C and the mean temperature sits around 27°C. February is the coolest month, with minimum temperatures around 9°C and an average of 11°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows. The sharpest temperature change occurs between November and December, with a 4°C shift in average temperatures.

Shikinejima is a very wet location, receiving approximately 2321mm of precipitation annually, which averages out to around 193mm per month. The wettest month is June, averaging 340mm of rainfall. October and September also tend to see above-average precipitation. The driest month is December, with just 104mm. That's 236mm less than June, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Shikinejima is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 6km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/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 9km/h in winter, 7km/h in spring, 6km/h in summer, 8km/h in autumn.

It is currently summer in Shikinejima, which began on June 21, 2026. Shikinejima 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 August at around 27°C, while the coldest stretch bottoms out in February near 9°C. Autumn is next, beginning on September 23, 2026 — 85 days from now.

The table below shows monthly climate averages for Shikinejima 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.