Hokkaido Weather in September

Season: autumn
In short: favorable, intensifying temperature changes, frequent heavy showers

Autumn arrives earlier in Hokkaido than in other regions. Entering September, the temperature drops gradually, averaging at around 20℃ (68℉), a favorable level suitable for outdoor sightseeing. Hokkaido also sees intensifying temperature changes between day and night. After night falls, it becomes cool when the temperature drops below 15℃ (59℉). 

The precipitation in September is relatively high. It varies in different regions and concentrates in the southern and central parts. For frequent heavy showers, the total precipitation is significant. There are totally sunny days for about half of this month, so do not worry about your journey being affected. Besides, the sun rises at around 5 am and sets at around 6 pm, thus you have enough time to have fun.

See more: Japan Weather in September

Hiking at Shikotsu-Toya National Park

What to Wear in Hokkaido in September

For urban tours

Blouse, long-sleeve T-shirt and jeans are recommended. Long-sleeve dress is also a good idea for woman. On sunny days, T-shirt is also acceptable. But you need to bring a trenchcoat or jacket to deal with the temperature variation between day and night. Casual shoes are advised. Do not forget to carry raingear with you in case it suddenly rains.

For visiting mountainous areas

Sweater, hoodie and sweatpants are more suitable for mountainous areas with lower temperature. When darkness falls, you need to add a thick overcoat as protection against the coldness. Besides, a pair of hiking shoes are necessary for the long journey. For raingear, a raincoat would be better for moving freely when hiking.

Top Things to Do in Hokkaido in September

Tourism Rate:

Exploring the Shikotsu-Toya National Park

Going for an outing on a crisp autumn day is the first choice for visitors to Hokkaido in September with favorable climate. Shikotsu-Toya National Park offers many choices for outdoor enthusiasts. You can go kayaking or dive at the clear Lake Shikotsu, hike on Mount Tarumae and Mount Yotei, and enjoy the scenery of Lake Toya on the Usuzan Ropeway. Walking on a 450 meters (1,476.4 feet) long wooden boardwalk in Noboribetsu Hell Valley, you will discover many fumaroles and hot springs.

Water Activities on Lake Shikotsu

City Tour in Hakodate

Cool September with moderate rainfall is also the best time to experience the charm of Hokkaido cities. Hakodate, as the gateway city of Hokkaido, has many attractions worth visiting. You can start your day trip from Hakodate Morning Market, where to fill the belly with various seasonal seafood. Then visit the unique Kanemori Red Brick Warehouse, a shopping center converted from warehouses built in 1887, stroll on the vibrant Motomachi Street, and appreciate the natural scenery in Seaport Park and Goryokaku Park. After night falls, it is a good choice to take the ropeway to the top of Mt. Hakodate, to overlook the charming night view of the whole city.

Seasonal Seafood at Hakodate Morning Market

Vibrant Motomachi Street

Sapporo Autumn Fest

Stalls at Sapporo Autumn Fest

Traveling in Hokkaido in September 2025, you have the chance to taste delicious food of Hokkaido all at once in Odori Park when the Sapporo Autumn Fest is celebrated. There are more than 300 stalls from different parts of Hokkaido, selling specialties all around Hokkaido and foods made with seasonal ingredients, such as Sapporo miso ramen, kaisen-don (rice topped with seafood) and Sapporo soup curry. You can also drink beers produced in local breweries and watch wonderful musical performances at the venue.

September Weather for Other Cities in Japan:

• Tokyo Weather in September
• Kyoto Weather in September
• Osaka Weather in September
• Nara Weather in September
• Nagoya Weather in September
• Hiroshima Weather in September
• Fukuoka Weather in September

Hokkaido Weather by Month