Lake Kawaguchi Weather in August
Season: summer Weather Conditions: hottest month of the year, many cloudy and rainy days, possible typhoon strikes
Lake Kawaguchi in August
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What’s the Weather like in Lake Kawaguchi in August?
Hottest Time of the Year
August in Lake Kawaguchi is the hottest month of the year, with the average temperature at 22℃ (71.6℉). Although the average highest temperature is only 27℃ (80.6℉), data from the past years shows that the actual temperature could exceed 32 degrees Celsius (89.6℉) or even 34℃ (93.2℉) on some days. Matched with the 83% humidity caused by rainfall, people may feel uncomfortable in such a sultry climate. But, it is a little cool in the early morning and at night, and the average lowest temperature is 17 degrees Celsius (62.6℉). So, we suggest you depart for your destination early when it is not hot, and avoid going out at noon.19 Rainy Days on Average and Possible Typhoon
In Japan, typhoons are frequent in August. Lake Kawaguchi would also be influenced by much rain and strong clouds caused by the typhoon. For example, this month, Lake Kawaguchi receives 178mm of rainfall and 19 rainy days on average. In such weather, you can't expect many sunny days, which is only 3 days on average. As a result, the chance of watching the clear Mount Fuji from Lake Kawaguchi in August is not high. If you plan to see Fuji, pick a sunny day and go out before 8:00, when Fuji's visibility is the highest of the day.
Mount Fuji in August
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13.5-Hour Day Length
The daylight hours this month are long at 13.5 hours, among which the average daily sunshine hours account for 9.5 hours. As the UV index is a little high at 5, you need to wear a sun protection coat and a mask to avoid sunburn when exposed to strong rays for a long time.All in all, Lake Kawaguchi’s hot and rainy weather in August makes it not a good time to travel here.
Clothes to Wear in Lake Kawaguchi in August
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If you plan to hike Mount Fuji in August 2025, thick autumn clothes are essential to keep you warm, because the temperature on Fuji summit ranges 5 - 8℃ (41 - 46.4℉) in summer. Also, don’t forget the necessary hiking tools like hiking backpacks and hiking poles. For more detailed information, feel free to read Climbing Mount Fuji.
Last, don’t forget to take an umbrella and a raincoat in case it rains.
Lake Kawaguchi August Travel Recommendation
Due to the frequent rain and high temperature, visiting indoor or cool attractions is a better choice, such as Narusawa Ice Cave and Fugaku Wind Cave. These 2 natural caves were formed from the eruption of Mount Fuji over 1,000 years ago. Their yearly temperatures range -3 - 3℃ (26.6 – 37.4℉). Visiting them in summer, you would feel very cool. Because of the low temperature, in the caves, you can watch the natural ice inside. Meanwhile, there are unique stalactite rocks for you to see.If it is sunny and the temperature is mild, hiking Mount Fuji, taking Lake Kawaguchi Cruise to appreciate the landscape, and walking along the trail in Kawaguchiko Tenjoyama Park to appreciate the sea of hydrangea flowers are all top things to do.
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Last, don’t miss the Fuji Five Lakes Fireworks Festivals from 1st to 5th August each year. Each night, a show is held by one lake. Among them, Lake Kawaguchi’s one on August 5th is the most magnificent. 10,000 fireworks would bloom with Fuji as the background. Along the lakeside, there are some snack food vendors. You can taste delicious food while watching the show.
Tips for Going to Lake Kawaguchi in August
1. If a typhoon happens, Mount Fuji’s hiking trails may be closed and the Tokyo-Kawaguchiko Bus would stop running temporarily. In addition, the rainfall would also influence the normal running of the Kawaguchiko Cruise. It is advised to check the weather forecast in advance before coming here.2. In mid-August, Japanese spend their Obon Festival holiday either by worshiping their ancestors or going travelling. The train and bus tickets are sold out quicker than usual, so you need to book tickets in advance. In 2025, the Obon Festival will be from August 13th to 16th.
August Weather for More Destinations in Japan:
