Yokohama Weather in September

 Season: Autumn
 What is the weather like in Yokohama in September?
On the whole, the weather in Yokohama in September is hot, but not severe and at an acceptable level. In the early morning and evening, it is generally cool. Due to frequent rainfalls, average sunshine hours are very short. It is worth noting that September is the typhoon season.

Beautiful Sea View in Yokohama

Temperature

Average temperature: 21-27 degrees Celsius (69.8-80.6 degrees Fahrenheit)

The climate in Yokohama in September is generally hot during the daytime, especially around noon in the early and middle month, with the maximum temperature basically no less than 28℃ (82.4 ℉). There may be several days when the highest temperature reaches 32-34℃ (89.6-93.2℉). In the early morning and during the night time, the temperature is cool at about 20-26℃ (68-78.8℉). 

In late September, the temperature during the day generally shows an apparent downward trend down to approximately 22℃ (71.6℉), with fluctuations; the minimum temperature is much lower, too, at 18-22℃ (64.4-71.6℉).

High Precipitation & Humidity

September is a month with high precipitation and frequent rainfalls in Yokohama, with the monthly average precipitation of 203mm distributing over 19 days. However, most rainfalls are very mild.

The monthly average humidity is 76%, which is at a high level. During the hot days, you may feel uncomfortable due to the humid air.

Yokohama in Overcast Day in September

September: Typhoon Season in Yokohama

September is one of the peak typhoon months in Yokohama. When the typhoon strikes, it is usually accompanied by a heavy rainstorm. Under such circumstances, not only tourist attractions like the Giant Ferris Wheel and Yokohama Air Cabin will cease operations, but even transportation such as trains will also be suspended. Therefore, you need to keep a close eye on the local weather forecast and avoid visiting Yokohama in such extreme weather. 

Daylight Duration & Sunshine Duration

Sunrise Time: 05: 52 - 06: 12
Sunset Time: 18: 04 - 18: 44

The average daylight duration is approximately 12.5 hours, which is enough for your daily visit; however, the average daily sunshine duration is only about 4 hours, because of the high chance of overcast or rainy weather. Thus, to make the most of your visit, you need to adjust your itinerary according to the weather. For instance, arrange some indoor attractions like the Cup Noodles Museum Yokohama on a rainy day and leave the sunny days for outdoor explorations. 

Tourists Selecting Sea Food

Packing Guide for Yokohama Trip in September

 Clothes

Most of the time in September, you can just wear summer clothes, like a short-sleeved shirts together with shorts or thin jeans. Skirts and dresses are suitable for female tourists to wear during the daytime. However, you may need to add a long-sleeved shirt or thin coat after dusk when the temperature drops. If you are planning to visit Yokohama in late September, you’d better wear layers like a thin coat over a long-sleeve shirt.

 Shoes
Casual sneakers and walking shoes are both appropriate options. It is worth noting that the shoes you wear are better to be water-proof and anti-slip in consideration of the frequent rainfalls in this month.

 Other Accessories
You definitely need to bring an umbrella, and you can bring other things like a hat and sunscreen if you want. After all, the ultraviolet rays this month are not weak, with an index of around 5 on average.

Pros and Cons of Visiting Yokohama in September

 Cons: Traveling in September is very likely to be affected by the rain since it is frequent and the typhoon may strike, which is not conducive to travel. 

 Pros: The overall temperature is at a comfortable level. Plus, the summer vacation has just passed, and the number of tourists decrease a lot. As a result, you can enjoy more favorable travel prices than in peak season. What’s more, the long queues at tourist attractions, especially at famous ones, will also reduce, contributing to a better travel experience.

Travel Advice for Yokohama Trip in September 

Beer Exhibitions during the Festival

 If you’re going to visit Yokohama in late September 2025, don’t miss the Yokohama Beer Festival, held at the Yokohama Red Brick Warehouse, which runs for 18 days starting from September 26 this year. During this time, you can enjoy acclaimed authentic German and local beers, as well as a wide variety of non-alcoholic beverages.

 Usually, in mid or late September every year, there is an event called “Sankeien Garden Harvest Moon Viewing” held in the Sankeien Garden to celebrate the Mid-Autumn Festival. During the festival, the closing hours of this scenic area will be extended from the usual 17:00 to 21:00. On a clear night, you can stroll through the Garden and enjoy the bright moonlight and the light show. Besides, there are music performances such as string music and wind instruments that add vibrancy and excitement to the silent night.

Yokohama Weather by Month