Climate Insights for Shirahama

The climate in Shirahama is warm and mild. The average annual temperature is 25°C and approximately 2015mm of precipitation falls per year. Shirahama receives a notable amount of rainfall throughout the year, including during its driest month. Shirahama 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 January, February, March, when temperatures can drop to 19°C.

Shirahama 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. January 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 November and December, with a 3°C shift in average temperatures.

Shirahama is a very wet location, receiving approximately 2015mm of precipitation annually, which averages out to around 168mm per month. The wettest month is September, averaging 265mm of rainfall. August and May also tend to see above-average precipitation. The driest month is February, with just 121mm. That's 144mm less than September, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Shirahama is very windy, with an average annual wind speed of 33km/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 40km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in August, with average winds dropping to 26km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 14km/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 38km/h in winter, 31km/h in spring, 29km/h in summer, 34km/h in autumn.

It is currently spring in Shirahama, which began on March 20, 2026. Shirahama 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 January near 19°C. Summer is next, beginning on June 21, 2026 — 87 days from now.

The table below shows monthly climate averages for Shirahama 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.