Nagano Weather in October

Laurel Flowers in October, Nagano

Season: Mid-Autumn
In Brief: Cool; Large Day-night Temperature Variance; Maple Leaves Season

In October, Nagano's autumn is characterized by cool days and nights, with the second half of the month typically experiencing slightly colder temperatures and a notable diurnal temperature variation. Late October is also the prime time to enjoy the stunning autumn foliage.

Temperature

Avg. Temperature Range: 8~17℃/47~63℉

Before October 20 in Nagano, the daytime temperatures hover between 20°C (68°F) and 28°C (82°F). Afterward, they fall to 15-20°C (59-68°F), with nighttime lows dropping below 10°C (50°F), signaling a shift to colder weather and emphasizing the substantial diurnal temperature change. In mountainous regions, the climate can vary widely, offering a unique experience of summer, autumn, and winter all in one day.

Precipitation

Rainfall: 83 mm

Avg. Rainy Days: 9

In October, downtown Nagano has about 5 rainy days, compared to 10 in the mountains. Check the weather forecast to avoid hiking during persistent rainfall.

Sunrise & Sunset

In October, the sun rises between 5:42 and 6:09 and sets between 16:51 and 17:31, providing approximately 11.5 hours of daylight for various activities in Nagano.

Highlight this Month: Maple Leaf Season

October to November brings a stunning foliage display in Nagano, with peak viewing from late October to mid-November in 2025. High areas like Tsugaike and Mount Shirouma start turning red in late September, while low regions like Lake Suwa follow in mid-October. Plan your visit to experience this natural spectacle.

Packing List

Upper Body

Short T-shirts and light or sunscreen jackets are suitable for early October. For the second half of the month, opt for long-sleeved shirts and medium-thickness jackets.

Bottoms

Shorts and light long pants are appropriate for early October, while thicker pants like jeans are better suited for the latter part of the month.

Shoes

Mountaineering or sports shoes are essential for exploring Nagano's mountains during autumn.

Accessories

Sunscreen items like sun cream and sunglasses are necessary on sunny days. Bring warm accessories like knitted hats and gloves for colder mountain climates at the end of the month.

Rain Gear

Raincoats, rain boots, and umbrellas are necessary in October.

Top Things to Do in October in Nagano

Enjoy Chestnuts in Obuse

Obuse, a haven for chestnut lovers, boasts an array of delicious chestnut treats. From roasted chestnuts to chestnut rice and Mont Blanc cakes, travelers are spoilt for choice. But the highlight is Suzaku, a fluffy wool ball-shaped dessert made with the freshest chestnuts during the peak season from mid-September to mid-October in 2025.

Obuse in October

Soak in the Open-air Onsen of Akiyama

Akiyama is famous for its wild onsen hidden within dense primeval forests. In October, immerse yourself in the soothing hot springs while enjoying breathtaking views of colorful forests and distant snow-capped mountains. Allow the natural beauty to wash away your worries and rejuvenate your spirit.

Red Leaves in Akiyama

Admire Foliage in Tsugaike Nature Park

In early October, Tsugaike Nature Park offers a stunning three-tiered view of autumn foliage, where red leaves and evergreen trees blend seamlessly with the snow-capped peaks of the North Alps, resembling a vibrant oil painting. 

As you hike higher, the mist-covered red leaves multiply, enveloping you in a magical, fairyland-like ambiance. Along the way, quirky autumn mushrooms with grotesque shapes and colors will captivate your attention.

Tips

1. After heavy rains in October, Nagano's hillsides transform into a magical fairyland shrouded in mist. However, hiking becomes risky due to limited visibility and slippery ground. Tourists planning activities this month should consider these risks carefully.

2. In October, stay indoors at night as the weather turns cold, and wild bears frequently roam for autumn hibernation food, so use a bear bell or similar sound apps to deter potential risks in wild areas.