Hakone

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

The climate in Hakone, located in Japan, can be described as temperate and humid, with four distinct seasons. The city experiences significant temperature fluctuations throughout the year, offering diverse weather conditions for visitors depending on the timing of their trip. Understanding these seasonal changes will help you better plan your journey.

Summer in Hakone (from June to August) is characterized as warm and quite humid. Average temperatures during this period range from 20.3°C in June to 25.8°C in August, with June standing out for having the highest rainfall (10 mm) and a high number of rainy days. Winters (from December to February) are cold, with average temperatures around 4.3°C in January and 6.5°C in December. Although there is less precipitation in the winter months (around 2 mm), the possibility of rainy or, given the temperature, snowy days still exists.

Spring (March–May) and autumn (September–November) offer milder, transitional temperatures but are also accompanied by significant rainfall. For example, in May, the average temperature is a pleasant 17.0°C, but there are about 17 rainy days. In autumn, specifically October, the temperature stays around 16.6°C, and the rainfall is among the highest of the year (9 mm). Overall, Hakone is characterized by frequent precipitation throughout much of the year, especially from March to October, when the number of "wet" days can reach between 15 and 20 per month. Therefore, tourists planning a visit are advised to be prepared for changeable weather and to carry an umbrella or raincoat.

The climate in Hakone is characterized by notable seasonal temperature changes. The annual temperature range is quite wide: from cool and occasionally cold winters to warm and humid summers. The coldest month is usually January, when the average temperature stays at 4.3°C, with nightly lows potentially dropping to 0.9°C and daily highs rarely exceeding 7.7°C. In contrast, August is the hottest month, with an average temperature of 25.8°C. During this period, daytime temperatures often reach 28.6°C, and nights remain warm, with minimum temperatures around 22.9°C.

Summer months in Hakone, especially July and August, bring warm and sometimes hot weather. Average daily temperatures in July are 24.6°C, rising to 25.8°C in August. Daytime highs in these months range from 27°C to nearly 29°C, creating comfortable conditions for walks, although high humidity may be felt given the significant number of rainy days. June is slightly cooler, with an average temperature of 20.3°C, making it a pleasant time to visit before the peak summer heat arrives.

Winter in Hakone is cool and sometimes cold. From December to February, average temperatures range from 4.3°C to 6.5°C. January stands out as the coldest, with nighttime frosts as temperatures drop to 0.9°C. Daytime temperatures in winter usually stay in the range of 7.7°C to 10°C. Temperature fluctuations between day and night are noticeable throughout the year but are especially prominent in the transitional seasons and winter, when the difference between the daytime maximum and nighttime minimum can be about 6–8°C. Spring and autumn offer more moderate temperatures, making these seasons popular for visiting.

Hakone experiences a distinct seasonality in the distribution of precipitation throughout the year. The highest rainfall occurs in the summer and early autumn months, while winter is characterized by drier weather. Overall, precipitation is a frequent occurrence, but its intensity and total volume vary significantly from month to month.

The wettest period in Hakone can be considered summer and early autumn. June stands out as the month with the highest average rainfall, reaching 10 mm, with approximately 20 rainy days. July, August, and September are also quite wet: August and September see about 20 days with precipitation, with amounts ranging from 7–8 mm. October also brings significant rainfall (averaging 9 mm) with 17 rainy days. During these months, rain is primarily expected, and its intensity can vary.

In contrast, the winter months are the driest. January and December receive the least amount of precipitation—only about 2 mm per month. December also has the fewest days with precipitation, averaging 9. In January and February, rainfall is 2 mm and 4 mm respectively, with 11–12 days of precipitation. Since the minimum temperatures in January (0.9°C) and February (1.5°C) are close to freezing, some winter precipitation, especially in the mountainous areas of Hakone, may fall as snow or sleet, although the total amount remains low.

When planning a trip to Hakone, it is important to consider the changeable weather and prepare accordingly. Regardless of the season, comfortable walking shoes will be your best friend, as Hakone is perfect for long walks and exploring natural beauty. Layering your clothes is the key to comfort. Even in the warmer months, evenings can be cool, and the weather in the mountains changes quickly. A small folding umbrella or a light waterproof jacket will come in very handy, given that precipitation is possible year-round, with the highest number of rainy days occurring from March to October.

The winter months (December–February) in Hakone are quite cold, with average temperatures from 4.3°C to 6.5°C and lows dropping almost to freezing. You will need a warm jacket (preferably windproof and waterproof), sweaters, warm trousers, a hat, gloves, and a scarf. Spring (March–May) and autumn (October–November) bring milder weather but still require layers: a light or medium-weight jacket, jumpers, and t-shirts. In May and October, rainfall and the number of rainy days increase, so a raincoat or umbrella is essential. Summer (June–September) is the warmest time of year, with average temperatures from 20°C to nearly 26°C. Dress in light, breathable clothing, but don't forget sun protection (sunscreen, a hat) and a light layer in case of rain, especially in June when precipitation and rainy days peak.

Besides clothing, don't forget a travel adapter if needed for your devices and a portable power bank to stay connected while exploring Hakone's scenic surroundings. Given the frequent rainfall, especially from spring to autumn, quick-drying clothes can be very practical. And, of course, a camera to capture the incredible views of this corner of Japan!