Nagano weather: 7-day forecast 長野
A mountain-basin city with cold, fairly dry winters (about 1.6 m of snow, January lows near −4°C) and warm summers; days and nights differ by 9–13°C all year.
Forecast updated 23 October 2026
The next 7 days
Today
24 Oct
Rain
High 17°CLow 12°C
Sun
25 Oct
Cloudy
High 21°CLow 16°C
Rain 80%
Mon
26 Oct
Cloudy
High 18°CLow 14°C
Rain 70%
Tue
27 Oct
Cloudy
High 19°CLow 11°C
Rain 60%
Wed
28 Oct
Cloudy
High 13°CLow 5°C
Rain 30%
Thu
29 Oct
Cloudy
High 17°CLow 4°C
Rain 30%
Fri
30 Oct
Cloudy
High 18°CLow 8°C
Rain 40%
What to wear today
Mild: long sleeves or a light cardigan. Bring a thin jacket for the evening.
Rain is likely on at least one day this week: pack a compact umbrella or buy one at any convenience store.
Nagano weather by month
Typical daily highs and lows and monthly rainfall (30-year averages, 1991–2020). Tap a month to see what's on.
Nagano's climate at a glance
Nagano city sits in a basin surrounded by the Japanese Alps. It is one of the driest cities in Japan, with under 1,000 mm of rain a year, and its inland position brings big temperature swings: in January highs reach about 4°C while lows drop to −4°C.
The city gets around 1.6 m of snow a season, while the ski areas of Hakuba, Nozawa Onsen and Shiga Kogen get many metres. Summer days reach 30–31°C, but nights are cooler than in Tokyo.
Best time to visit Nagano
December to March for skiing and for the Jigokudani snow monkeys, which bathe in the hot spring most often on the coldest days of January and February. Cherry blossoms open around 11 April. Autumn colour in the mountains peaks in October, reaching the city in early November.
Tips
- Mornings are cold even when afternoons are warm. Dress in layers in spring and autumn.
- The path to the snow monkeys is a 30-minute walk on packed snow in winter. Wear boots with grip or rent spikes at the trailhead.
- Mountain resorts like Hakuba can be 5–10°C colder than Nagano city. Check the forecast for the resort itself.
Questions travellers ask
When is the best time to see the snow monkeys?
January and February, when snow covers the valley and the monkeys use the hot spring most.
How much snow does Nagano city get?
About 1.6 m a season, mostly from December to February. The ski areas in the mountains get far more.
Is Nagano hot in summer?
Days are warm, about 30–31°C in July and August, but nights cool to around 21°C.
Sources
We checked the facts on this page against these sources.
- Japan Meteorological Agency気象庁JMA climate normals 1991–2020 (Japanese)(in Japanese) (opens in a new tab)
- Japan Meteorological Agency気象庁JMA rainy season start and end dates(in Japanese) (opens in a new tab)
- Japan Meteorological Agency気象庁JMA cherry blossom and autumn leaf normals(in Japanese) (opens in a new tab)