Weather in Shirahama

Planning a trip or simply curious about the weather in Shirahama? Here you will find the most up-to-date information on weather conditions, including detailed forecasts and clear charts.

The city of Shirahama in Japan features a temperate climate with four distinct seasons. Visitors can expect warm, and at times hot, summer months, and relatively mild, cool winters. Temperature variations throughout the year are significant, allowing tourists to choose the most comfortable time to travel based on their preferences.

Summer in Shirahama, particularly from June to September, is characterized by the highest temperatures, averaging 25-27°C, as well as the highest rainfall and number of wet days. The winter months, from December to February, bring cooler weather with average temperatures around 7-9°C and significantly less rainfall. Spring (March-May) and autumn (October-November) are transitional seasons with pleasant, moderate temperatures and a moderate number of rainy days, making them popular times to visit.

The climate in Shirahama is characterized by noticeable seasonal temperature variations. Throughout the year, the average temperature ranges from a cool 7.0°C in January to a warm 26.9°C in August. January is typically the coldest month, with the average minimum temperature dropping to 4.8°C and the daily maximum reaching an average of 9.2°C. Conversely, August is the hottest month, with average nightly lows around 25.0°C and daily highs reaching 28.9°C.

The summer months in Shirahama, especially July and August, bring consistently warm weather. In July, the average temperature is 25.7°C (ranging from 23.9°C to 27.5°C), and in August it is 26.9°C (from 25.0°C to 28.9°C). June is also warm, with an average temperature of 21.7°C. The difference between day and night temperatures in summer is not very large, indicating warm nights. The weather during this period feels hot and, given the number of wet days, likely humid.

Winter in Shirahama is quite mild. In December, the average temperature holds at 8.9°C (from 6.8°C to 11.0°C), in January it drops to 7.0°C (from 4.8°C to 9.2°C), and in February it rises slightly to 7.6°C (from 5.2°C to 10.0°C). Night frosts are not typical, as minimum temperatures remain above freezing. Daytime temperatures also remain positive, creating cool but not freezing conditions. Temperature fluctuations between day and night in winter are slightly more pronounced than in summer, but still remain moderate, at around 4-5°C.

In Shirahama, precipitation occurs throughout the year, although its intensity and frequency vary notably depending on the season. There is a distinct wetter period covering the summer and early autumn months, while late autumn and winter are characterized by less rainfall.

The highest amount of precipitation falls in June, with an average of about 11 mm. July is also a wet month, bringing around 10 mm of precipitation. In May, August, September, and October, rainfall amounts to approximately 8 mm in each of these months. The summer months and early autumn stand out with the highest frequency of rain: July, August, and September see an average of 18 rainy days each. June is also frequently rainy, with about 17 days per month. Given the warm temperatures of this period, the precipitation likely takes the form of summer rains, possibly heavy showers.

A drier season sets in from November to April. The driest month by volume of precipitation is December, when only about 2 mm falls. There is slightly more precipitation in January and November (3 mm each). In terms of rainy days, the least wet month is November (average 8 days), followed by December (9 days), as well as January, February, and April (10 rainy days each). In these cooler months, the rains are likely less intense.

When planning a trip to Shirahama, it is important to prepare for diverse weather conditions. The winter months (December to February) and early spring (March) are characterized by cool weather with average temperatures ranging from 7°C to 11°C. During this time, you will need warm items: sweaters, an insulated jacket (preferably windproof), a hat, and gloves, especially if you are travelling in January. Although the total amount of rainfall is low during these months, it rains about 10 days a month, so a compact umbrella or a light waterproof jacket that also protects against the wind will be very useful. November is also quite cool, and similar clothing recommendations apply.

From late spring (May) and throughout the summer (June-August), as well as in early autumn (September-October), warm and humid weather settles in Shirahama. Average temperatures during this period range from 18°C to 27°C. When packing your suitcase, opt for light, breathable clothing made from natural fabrics. Do not forget sunscreen, a hat, and sunglasses for protection against the sun. June, July, August, and September are the months with the highest probability of rain – up to 17-18 rainy days per month. Therefore, a reliable umbrella or a light raincoat will become your indispensable companions. Even in May and October, it is worth being prepared for periodic rainfall.

Regardless of the season, comfortable walking shoes will always be useful for exploring Shirahama and its picturesque surroundings. The principle of layering clothing is an excellent strategy for any time of year, but it is especially relevant for transitional seasons such as April or November, when the temperature can change noticeably throughout the day. This approach will allow you to easily adapt to weather conditions and feel comfortable while enjoying all the charms of this enchanting corner of Japan.