Mount Fuji Weather in August

 Season: Summer
 What is the weather like in Mount Fuji in August?
The weather at Mount Fuji foot in August is the hottest throughout the year, but it’s bearable generally. The top of the mountain still features low temperatures, but not freezing and opens for climbing. Precipitation is frequent and intermittent over the month, so the visibility is greatly influenced and not good.

Mount Fuji in August

The Hottest Month but Seldom Intensively

During the daytime, the weather at the foot of the Mount Fuji is hot overall, with the average high temperature of 28 degrees Celsius (82.4 degrees Fahrenheit). In some days, the maximum temperature exceeds 30℃ (86℉); and there may be a few occasions when the highest temperature reaches 35℃ (95℉). If there is continuous rainfall, the daytime temperature may drop to around 25℃ (77℉). The temperature in the early mornings and evenings is very comfortable, ranging from 16-22℃ (60.8-71.6℉).

Due to the high altitude, the climate in the higher elevations of the mountain is generally cold even in this summer month, with the temperature averaging 4-10℃ (39.2-50℉). Delightfully, as there is no snow cover, the summit of Mount Fuji is open to tourists.

Precipitation & Humidity

The foothills see rain in approximately 19 days in August, averaging approximately 198 mm. Most of the time, the rainfall is light and thundershowers are more likely to occur in the afternoon and at dusk; if there are moderate to heavy showers, the sky is prone to clear up faster. The weather on the mountain is changeable and thunderstorms may occur suddenly.

The monthly average humidity is 81% under the mountain and 75% at the top.

Daylight Hours & Sunshine Hours

Sunrise time (1st-31st): 04: 54 - 05: 17
Sunset time (1st-31st): 18: 50 - 18: 16

During the first few days of the month, you can enjoy up to 14 hours of daylight each day, but then the sun rises later and sets earlier and by the end of the month, daylight hours are down to around 13 hours. Because of the frequent rainfall and thick clouds, it’s hard to see sunny days in a row. But as the duration of precipitation each day is not long, there is still about 9 hours of sunshine on average per day.

The UV rays in August cannot be underestimated with the monthly average index of 5 at the mountain foot. They are even stronger around sunny noon, not to mention at high altitudes where you’re very likely to get a severe sunburn without proper sun protection. Therefore, sunscreen is a must during your trip to Mount Fuji in August.

Spectacular Dusk View of Mt. Fuji

Visibility

Visibility in August is not good in general and is greatly affected by the weather, with noticeable variations during the day. Usually, visibility is higher in the morning than in the afternoon, and higher in northern areas, such as around Lake Yamanaka, than in the south. Therefore, you are recommended to prioritize seeing Mount Fuji in northern areas and during the morning hours. That said, it’s best to check the weather forecasts before traveling to ensure a successful viewing experience.

What to Wear and Bring to Mount Fuji in August?

 Clothing
If you’re just staying at the foothills, dress coolly: short-sleeved shirts, shorts, or skirts are fine. If the sun is too strong, it’s recommended to wear light, breathable top and long pants with sun protection characteristics. If you plan to climb the mountain, you’d better wear a quick-drying shirt underneath to prevent discomfort caused by sweating and climbing trousers for the bottom. Plus, you need to pack warm clothes in your bag, like a 3-in-1 jacket, as the temperature drops quickly above the 5th Station.

 Footwear
It’s advisable to wear breathable and light sneakers that are comfortable for long walk and it would be better to bring water-proof shoe covers in case of the rain. Mountain climbers are recommended to wear climbing shoes with high tops to protect your ankles.

 Others
Rain gear is highly needed. Other necessities for Mount Fuji trip in August include sun hats and glasses, which are particularly crucial for hikers.

Travel Highlights in Mount Fuji in August

 Every year in the early days of August, the Five Lakes region surrounding Mount Fuji hosts numerous fireworks activities, including the most grandiose Lake Kawaguchi Fireworks Festival, and other fireworks festivals held in places like the Lake Saiko and the Lake Motosuko. At night, dazzling fireworks explode in the sky above the lakes, creating a unique and dreamy spectacle against the majestic backdrop of Mount Fuji. In addition, various street food markets are also available to satisfy your appetite. You may also enjoy music performance at the festive night.

 During the Obon Festival in mid-August each year, the Lake Kawaguchi offers a unique spectacle: over one thousand of illuminated lanterns float across the lake, carrying good wishes and longings for departed loved ones. With soft light reflecting on the rippling surface and the elegant performances of a live orchestra, you’ll have an unforgettable summer night.

Tourits on Cruise of Lake Kawaguchi

Travel Tips

August is the peak climbing season for Mount Fuji, especially during the Obon Festival, when climbers flock to the mountain. However, the number of people allowed to reach the summit each day is limited to 4,000. Therefore, if you’re planning a hike in August 2026, be sure to make a reservation for climbing and book your accommodation in advance. Besides, climbing is prohibited between 4 p.m. and 3 a.m., so plan your hike accordingly.

Trial to Mount Fuji Summit

Climbers on the Way to Mt. Fuji Summit

Mount Fuji Weather by Month