Mount Fuji Weather in September

Season: Autumn

What is the weather like in Mount Fuji in September?

The foothills of Mount Fuji in September are generally quite mild, with the temperature being pleasant during the day and very cool at night. Although monthly average precipitation is high, it is mainly in form of light rain. The climate of the higher elevations is very cool around noon but cold most time; strong winds may occur from time to time, and dense fog could also permeate the mountain, making the visibility very low.

Mount Fuji in September

Overall Mild Temperature

The temperature of the Mount Fuji foothills in September is generally very pleasant, with the average high temperature of 24 degrees Celsius (75.2 degrees Fahrenheit) and average low of 15℃ (59℉). There are several days when the maximum temperatures exceed 26℃ (78.8℉), which usually occurs in the early and middle periods. In sunny weather occasionally, the highest temperature may reach around 30℃ (86℉). In the early morning and evening, it’s comfortably cool, with the minimum temperatures rarely exceeding 20℃ (68℉) or falling under 13℃ (55.4℉).

The average high temperature at Mount Fuji’s Fifth Station is around 14℃ (57.2℉), and the average low temperature is around 5℃ (41℉), which is quite chilly. The summit is much colder, with an average temperature of 1-7℃ (33.8-44.6℉), so it is usually closed to the public around September 10th.

High Precipitation & Humidity

With the monthly rainfall accumulation averaging 286mm, September is characterized as a month with high precipitation, from approximately 19 rainy days over the month. Nevertheless, you don’t need to worry too much as light rain dominates and moderate to heavy rain rarely occurs. On the mountain, rain shower accompanied by thick mist is prone to happen.

Naturally, the foothills are very humid, with monthly average humidity around 82%. The data is a bit lower in the higher elevations, around 67%.

Is There Snow in Mount Fuji in September?

Generally speaking, Mount Fuji summit has not been covered by snow in September. In history, late September is the earliest time ever recorded snow cap. However, over the past years, the first snowfall on Mount Fuji has been showing signs of delay. For instance, in 2024, the snow cap did not appear till November 6.

Daylight Hours & Sunshine Hours

Sunrise time (1st-30th): 05: 18 - 05: 39
Sunset time (1st-30th): 18: 14 - 17: 32

The daylight duration ranges from 13 hours at the beginning of September to 12 hours at the end. Therefore, if you visit Mount Fuji in late September, you may need to conclude your day earlier.

There are an average of 7 sunny days, and the average sunshine time per day is about 7 hours.

Enjoy Sightseeing on Lake Kawaguchi

Visibility

Due to frequent rainy and overcast weather, visibility in September is generally poor, especially in the early mornings, when the fog surrounding Mount Fuji can be extremely thick, severely obscuring the mountain.

Is Mount Fuji Worth It in September?

It depends on your intentions. If you are coming for a clear view of the Mount Fuji, the chances are limited due to overall low visibility. For those who wish to see the snow-capped summit, you are also likely to be disappointed, as the top is very likely to remain bare.

However, if you’re planning a summit climb for your 2026 Mount Fuji trip, it is worth a visit in early September. As it draws to the end of the climbing season this month, climbers decrease significantly, contributing to easier reservations of accommodations. However, you need to keep a close eye to the weather conditions on Mount Fuji and avoid ascending in the day with heavy rain or strong winds.

Watching Mt. Fuji in Distance

What to Pack for Mount Fuji Trip in September?

Clothing
Summer clothes like dress, or short-sleeved shirt together with shorts are suitable most time at the mountain foot. But on sunny days, it is best to wear sun-proof clothing, or a thin long-sleeved shirt and long pants because the UV rays are very strong, far exceeding the average index of 4.

For visitors who want to climb the mountain, climbing suit like 3-in-1 jacket plus climbing trousers are necessary. Besides, you are recommended to wear quick-drying inner layers for physical comfort.

Footwear
Summer shoes such as casual sneakers and canvas shoes are comfortable for walking. Remember to pack some water-proof shoe covers in case you encounter rainy weather. Professional climbing shoes are needed for hikers.

Others
Umbrella and raincoat are indispensable, and the latter is more convenient for climbers. Sun protections items such as the parasol, sun hat, sunglasses and sunscreen are equally important particularly on the mountain where the UV rays are severely strong on clear days.

Travel Advice & Tips

After climbing and coming down from the summit, climbers must be very cold and exhausted. Why not take a warm bath in a hot spring for relaxation? You can go to many places near the foot of Mount Fuji, such as the Lake Kawaguchi where both indoor and outdoor hot springs are available.

With its vast and breathtaking scenery, Mount Fuji’s surroundings offer a truly captivating outdoor experience. However, if rain is forecasted, it’s best to adjust your itinerary flexibly. For example, the Mount Fuji Museum and the Mount Fuji World Heritage Center not only offer you a peaceful experience without the disturbance of rain, but also enrich your knowledge of this iconic mountain. Or you can visit the Nakisawa Ice Caves by taking the route bus from the Lake Kawaguchi Station for about 30 minutes. There are astonishing natural wonders such as basaltic lava formations and ice columns formed by water droplets. With the colorful lights adding to the backdrop, they are even more beautiful and captivating.

Enjoy Open-air Hot Spring

Tourist Cycling Along the Lakeshore